# Airbus Service Bulletin A350-57-P074

Copy: No revision named ("A350-57-P074"), 51 pages: PDF https://openairdocs.org/files/sha256/32/4d/324dbda36591477f98b9b8e4dc7ba7864cb8f9c04cc5a1fd72f1a2ba66ceaca0; text https://openairdocs.org/service-documents/airbus/a350-57-p074/file/324dbda36591.md. Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2023-1038, the docket of AD 2023-14-09. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Airbus](https://openairdocs.org/service-documents/airbus.md)
- Type: Service bulletin (Service Bulletin)
- Number: A350-57-P074
- Page: https://openairdocs.org/service-documents/airbus/a350-57-p074

## ADs that cite it (2) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2025-20-05](https://openairdocs.org/ad/2025-20-05.md), effective Dec 30, 2025: No revision named
- [AD 2023-14-09](https://openairdocs.org/ad/2023-14-09.md), effective Sep 7, 2023: No revision named

Also cited in [2 proposed ADs](https://openairdocs.org/service-documents/airbus/a350-57-p074/proposed.md).

## Text (51 pages)

Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2023-1038, the docket of AD 2023-14-09. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 1
CONF ALL
AIRBUS
2, ROND POINT EMILE DEWOITINE
31700 BLAGNAC
FRANCE
 
The content of this document is the property of Airbus. All rights including copyrights are reserved.
It is supplied in confidence and commercial security on its contents must be maintained.
It must not be used for any purpose other than that for which it is supplied, nor may information
contained in it be disclosed to unauthorized persons.
It must not be reproduced in whole or in part without permission in writing from the owners of the
copyright. Requests for reproduction of any data in this document and the media authorized for it must
be addressed to Airbus.
MANDATORY MANDATORY MANDATORY
ATA SYSTEM: 57
TITLE: WINGS - INTRODUCE OVERLAP SEALANT OPTIMISATION IN WINGBOX
- 1000 WUC
MODIFICATION No.:
116646L01172

### Page 2

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jun 24/22 A350-57-P074
Page 2
ATA SYSTEM: 57
TITLE: WINGS - INTRODUCE OVERLAP SEALANT OPTIMISATION IN WINGBOX
- 1000 WUC
SUMMARY
This summary is for information only and is not approved for modification of the aircraft.
A. MODIFICATIONS
CONF 001
MODIFICATION CLASSIFICATION
MAJOR None
MINOR 116646L01172
NOTE: As per EASA IR 21, a minor change is one that has no appreciable effect on the
mass, balance, structural strength, reliability, operational characteristics affecting
the airworthiness of the product. All other changes are major changes.
NOTE: This modification is related to an airworthiness issue and has been re-classified and
confirmed by EASA as minor in accordance with EU Part 21.A.91. As such, this is
handled by Airbus under the Design Organisation Approval ref. EASA.21J.031.
CONF 002
MODIFICATION CLASSIFICATION
MAJOR None
MINOR 116646L01172
NOTE: As per EASA IR 21, a minor change is one that has no appreciable effect on the
mass, balance, structural strength, reliability, operational characteristics affecting
the airworthiness of the product. All other changes are major changes.
NOTE: This modification is related to an airworthiness issue and has been re-classified and
confirmed by EASA as minor in accordance with EU Part 21.A.91. As such, this is
handled by Airbus under the Design Organisation Approval ref. EASA.21J.031.
CONF ALL
B. REASON
(1) History
It has been identified that overlap sealant which provides the second layer of
protection to prevent stringer edge glow in case of lighting strike may not have been
applied at all required locations of the A350 wing. Inspection Ref. SB A350-57-P067
was introduced to address this issue and this modification Ref. SB A350-57-P074 is
specific to A350–1000 aircraft wing upper (WUC) locations that may be affected. When
applicable to configuration alignment both SB's can be carried out in conjunction.
(2) Objective/Action
Modification (MOD) 116646 L01172 restores the original design intent for sealant
application on the WUC.

### Page 3

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jun 24/22 A350-57-P074
Page 3
(3) Advantages
Embodiment of this modification ensures that the correction of missing sealant will
restore the 2 independent layers of lightning strike protection in accordance with the
certification requirement.
(4) Operational/Maintenance Consequences
None
C. GENERAL EVALUATION
EVALUATION TABLE
COMPLIANCE MANDATORY COST SAVING NO
A/C OPERATION
AFFECTED
NO VENDOR SB NO
CANCELS INSPECTION SB NO ETOPS AFFECTED NO
PAX COMFORT AFFECTED NO POTENTIAL AD YES
RELIABILITY AFFECTED NO STRUCTURAL LIFE EXTENSION NO
LIFE LIMIT NO LINE MAINTENANCE AFFECTED NO
NOTE: Service Bulletin must be accomplished.
D. MAINTENANCE CONFIGURATION
CONF 001
MAINTENANCE CONFIGURATION
FUEL TANKS OPENED YES
CONF 002
MAINTENANCE CONFIGURATION
FUEL TANKS OPENED YES
CONF ALL
E. MATERIAL PRICE INFORMATION
CONF 001
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
No material
CONF 002
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
No material
CONF ALL
F. APPLICABILITY
This Service Bulletin is applicable to this (these) operator(s):
CPA QTR

### Page 4

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jun 24/22 A350-57-P074
Page 4
G. CONCURRENT REQUIREMENTS
None
H. NATURE OF THE WORK
CONF 001
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
AIRCRAFT YES
EQUIPMENT NO
CONF 002
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
AIRCRAFT YES
EQUIPMENT NO
CONF ALL
I. MANPOWER
CONF 001
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
MANPOWER
TOTAL MAN-HOURS 90.75 h
ELAPSED TIME (HOURS) 17.75 h
CONF 002
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
MANPOWER
TOTAL MAN-HOURS 102.75
h
ELAPSED TIME (HOURS) 19.50 h

### Page 5

A350
SERVICE BULLETIN
SUMMARY
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTX-A-001-01 Fig.SA Sol.AA SHEET 1/1
REV 00 Jun 24/22 A350-57-P074General overview
Page 5
CONF ALL
J. GENERAL OVERVIEW
CONF ALL
RIBS, LOWER STRINGERS AND WING LOWER COVER NOT SHOWN
VIEW LOOKING UP
A
RIB1
RIB3
RIB5
RIB6
RIB7
RIB8
RIB10
RIB13
RIB15
RIB17
RIB19
RIB21
RIB27
STGR3
STGR4
STGR6
STGR11
STGR12
STGR13
STGR14
STGR15
STGR16
STGR17
STGR18
F
W
DINBD
STGR1
STGR2 Z500
Z600
LH
RH
LH SHOWN
RH SYMMETRICAL
A
STGR19
DO THE APPLICATION OF SEALANT TO THE UPPER RIB FEET
RH SYMMETRICAL
LH SHOWN
ICN-A350-A-57XXP074-A-FAPE3-06GTX-A-001-01

### Page 6

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 6
ATA SYSTEM: 57
TITLE: WINGS - INTRODUCE OVERLAP SEALANT OPTIMISATION IN WINGBOX
- 1000 WUC
1. PLANNING INFORMATION
A. APPLICABILITY
NOTE: This modification is applicable by Service Bulletin only.
(1) Models
ON A/C 0088, 0102, 0110, 0118, 0125
350-1041
CONF ALL
(2) Applicability by MSN
0088 0102 0110 0118 0125
(3) MSN by configuration
CONF 001
MSN CONFIGURATION
0088 0102 0110 0125 001
CONF 002
MSN CONFIGURATION
0118 002
CONF ALL
(4) Configuration definition
CONF 001
Configuration 001
CONF 001 is valid for all aircraft given in the applicability of this Service Bulletin
which do not have MOD No. 100357L41136 embodied.
CONF 001 retrofits following modifications: 116646L01172.
CONF 002
Configuration 002
CONF 002 is valid for all aircraft given in the applicability of this Service Bulletin
which have MOD No. 100357L41136 embodied.
CONF 002 retrofits following modifications: 116646L01172.
CONF ALL
B. CONCURRENT REQUIREMENTS
None
C. REASON
(1) History
It has been identified that overlap sealant which provides the second layer of
protection to prevent stringer edge glow in case of lighting strike may not have been
applied at all required locations of the A350 wing. Inspection Ref. SB A350-57-P067

### Page 7

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 7
was introduced to address this issue and this modification Ref. SB A350-57-P074 is
specific to A350–1000 aircraft wing upper (WUC) locations that may be affected. When
applicable to configuration alignment both SB's can be carried out in conjunction.
(2) Objective/Action
Modification (MOD) 116646 L01172 restores the original design intent for sealant
application on the WUC.
(3) Advantages
Embodiment of this modification ensures that the correction of missing sealant will
restore the 2 independent layers of lightning strike protection in accordance with the
certification requirement.
(4) Operational/Maintenance Consequences
None
D. DESCRIPTION
T o accomplish this Service Bulletin it is necessary to:
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
1 Apply Sealant to the Upper Rib Feet in the LH Wing
2 Apply Sealant to the Upper Rib Feet in the RH Wing
E. COMPLIANCE
(1) Classification
MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale
Accomplishment of this Service Bulletin must be done no later than 6 years from entry
into service..
This Service Bulletin has been classified Mandatory. It is expected that an
Airworthiness Directive (AD) published by the European Union Aviation Safety Agency
(EASA) will be issued to confirm this classification. It is anticipated that the AD will
confirm the threshold given but reference should be made to the AD for confirmation
of the mandated accomplishment timescale.
F. APPROVAL
The technical content of this document is approved under the authority of the Design
Organisation Approval ref. EASA.21J.031.
If an aircraft listed in the applicability has a modification or repair embodied that is not
of AIRBUS origin, and which affects the content of this Service Bulletin, the operator
is responsible for obtaining approval by its airworthiness authority for any adaptation
necessary before incorporation of the Service Bulletin.
G. MANPOWER
CONF 001
The manpower estimates given in this Service Bulletin are based on the direct labor cost to
do the work. These estimates assume that the work will be done by experienced personnel,
and may need to be revised upwards to suit operator’s circumstances. The estimates do not
include the time to prepare, plan or inspect the work. Manufacture and procurement of parts
and tools, drying times for paints, sealants, etc., and general administration work are also
not included.

### Page 8

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 8
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
PREPARATION
Job Set-up 0.25 h
Open the LH Wing Access Covers and Access Doors 11.50 h
Remove the Pipes in the LH Wing Between Ribs 12 and 22 8.00 h
Open the RH Wing Access Covers and Access Doors 11.50 h
Remove the Pipes in the RH Wing Between Ribs 12 and 22 8.00 h
PROCEDURE
Apply Sealant to the Upper Rib Feet in the LH Wing 2.00 h
Apply Sealant to the Upper Rib Feet in the RH Wing 2.00 h
PREPARATION FOR TEST
Install the Pipes in the LH Wing Between Ribs 12 and 22 12.00 h
Install the Pipes in the RH Wing Between Ribs 12 and 22 12.00 h
TEST
T est 0.25 h
CLOSE-UP
Close the LH Wing Access Covers and Access Doors 11.50 h
Close the RH Wing Access Covers and Access Doors 11.50 h
Close-up 0.25 h
TOTAL MAN-HOURS 90.75 h
ELAPSED TIME (HOURS) 17.75 h
NOTE: For an explanation of the man-hours and elapsed time, refer to the
Gantt Chart given in Appendix A.
CONF 002
The manpower estimates given in this Service Bulletin are based on the direct labor cost to
do the work. These estimates assume that the work will be done by experienced personnel,
and may need to be revised upwards to suit operator’s circumstances. The estimates do not
include the time to prepare, plan or inspect the work. Manufacture and procurement of parts
and tools, drying times for paints, sealants, etc., and general administration work are also
not included.
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
PREPARATION
Job Set-up 0.25 h
Open the LH Wing Access Covers and Access Doors 11.50 h
Remove the Pipes in the LH Wing Between Ribs 12 and 22 11.00 h
Open the RH Wing Access Covers and Access Doors 11.50 h
Remove the Pipes in the RH Wing Between Ribs 12 and 22 10.00 h
PROCEDURE
Apply Sealant to the Upper Rib Feet in the LH Wing 2.00 h

### Page 9

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 9
Apply Sealant to the Upper Rib Feet in the RH Wing 2.00 h
PREPARATION FOR TEST
Install the Pipes in the LH Wing Between Ribs 12 and 22 16.00 h
Install the Pipes in the RH Wing Between Ribs 12 and 22 15.00 h
TEST
T est 0.25 h
CLOSE-UP
Close the LH Wing Access Covers and Access Doors 11.50 h
Close the RH Wing Access Covers and Access Doors 11.50 h
Close-up 0.25 h
TOTAL MAN-HOURS 102.75 h
ELAPSED TIME (HOURS) 19.50 h
NOTE: For an explanation of the man-hours and elapsed time, refer to the
Gantt Chart given in Appendix A.
CONF ALL
H. WEIGHT AND BALANCE
Not changed
I. ELECTRICAL LOAD DATA
Not changed
J. REFERENCES
CONF 001
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
AIRCRAFT STRUCTURAL REPAIR (ASR)
A350-A-51-24-XX-01ZZZ-667Z-A A350-A-51-76-12-00ZZZ-660Z-A
ELECTRICAL STANDARD PRACTICES (ESP)
A350-A-20-55-XX-01ZZZ-042Z-A
INTRODUCTION (INTRO)
A350-A-00-61-04-11ZZZ-018Z-D
MAINTENANCE PROCEDURE (MP)
A350-A-24-41-XX-00ZZZ-170Z-A A350-A-28-12-62-04ZZZ-520Z-A
A350-A-28-12-62-04ZZZ-720Z-A
A350-A-28-12-62-05ZZZ-520Z-A
A350-A-28-12-62-05ZZZ-720Z-A
A350-A-28-12-62-06ZZZ-520Z-A
A350-A-28-12-62-06ZZZ-720Z-A
A350-A-28-12-63-00ZZZ-520Z-A A350-A-28-12-82-00ZZZ-520Z-A

### Page 10

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 10
MAINTENANCE PROCEDURE (MP)
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-520Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-520Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-520Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-12-82-00ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-520Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-520Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-520Z-A
A350-A-47-20-62-00ZZZ-720Z-A
A350-A-57-27-71-00ZZZ-520Z-A
A350-A-57-27-71-00ZZZ-720Z-A
A350-A-57-27-71-01ZZZ-520Z-A
A350-A-57-27-71-01ZZZ-720Z-A
SERVICE BULLETIN (SB)
A350-57-P067 A350-57-P074
SYSTEM DESCRIPTION (SD)
A350-A-06-3X-XX-01ZZZ-04CZ-A A350-A-57-2X-XX-01ZZZ-04CZ-A
CONSUMABLE MATERIAL LIST (CML)
CONF 002
(1) Application of Sealant to the Upper Rib Feet
(a) T ask set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to the Upper
Rib Feet
AIRCRAFT STRUCTURAL REPAIR (ASR)
A350-A-51-24-XX-01ZZZ-667Z-A A350-A-51-76-12-00ZZZ-660Z-A
ELECTRICAL STANDARD PRACTICES (ESP)
A350-A-20-55-XX-01ZZZ-042Z-A
INTRODUCTION (INTRO)
A350-A-00-61-04-11ZZZ-018Z-D
MAINTENANCE PROCEDURE (MP)
A350-A-24-41-XX-00ZZZ-170Z-A A350-A-28-12-62-04ZZZ-520Z-A
A350-A-28-12-62-04ZZZ-720Z-A
A350-A-28-12-62-05ZZZ-520Z-A
A350-A-28-12-62-05ZZZ-720Z-A
A350-A-28-12-62-06ZZZ-520Z-A

### Page 11

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 11
MAINTENANCE PROCEDURE (MP)
A350-A-28-12-62-06ZZZ-720Z-A
A350-A-28-12-63-00ZZZ-520Z-A
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-520Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-520Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-520Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-12-82-00ZZZ-520Z-A
A350-A-28-12-82-00ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-520Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-520Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-28-31-61-01ZZZ-520Z-A
A350-A-28-31-61-01ZZZ-720Z-A
A350-A-28-31-61-02ZZZ-520Z-A
A350-A-28-31-61-02ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-520Z-A
A350-A-47-20-62-00ZZZ-720Z-A
A350-A-57-27-71-00ZZZ-520Z-A
A350-A-57-27-71-00ZZZ-720Z-A
A350-A-57-27-71-01ZZZ-520Z-A
A350-A-57-27-71-01ZZZ-720Z-A
SERVICE BULLETIN (SB)
A350-57-P067 A350-57-P074
SYSTEM DESCRIPTION (SD)
A350-A-06-3X-XX-01ZZZ-04CZ-A A350-A-57-2X-XX-01ZZZ-04CZ-A
CONSUMABLE MATERIAL LIST (CML)
CONF ALL
K. PUBLICATION AFFECTED
None
L. INDUSTRY SUPPORT INFORMATION
For the accomplishment of this Service Bulletin within 6 years after the initial issue date
of the Service Bulletin, AIRBUS will credit the man-hours indicated in this Service Bulletin
at the agreed in-house warranty labor rate. Claims for this allowance shall be received no
later than 90 days after completion of the last affected aircraft of your fleet fulfilling above
timeframe conditions.

### Page 12

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 12
2. MATERIAL INFORMATION
A. MATERIAL APPLICABILITY
CONF 001
Material for task set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to
the Upper Rib Feet
MATERIAL QTY SEE NOTES
Referenced tools See SB
Consumables See SB
Referenced consumables See SB
Referenced parts See SB
CONF 002
Material for task set A350-A-57-XX-P074-01000-93AA-A Application of Sealant to
the Upper Rib Feet
MATERIAL QTY SEE NOTES
Referenced tools See SB
Consumables See SB
Referenced consumables See SB
Referenced parts See SB
CONF ALL
B. TOOLING
CONF 001
Referenced tools for task set A350-A-57-XX-P074-01000-93AA-A Application of
Sealant to the Upper Rib Feet
T o accomplish this Service Bulletin it is necessary to use the tools listed in:
Ref. MP A350-A-57-27-71-00ZZZ-520Z-A
Ref. MP A350-A-57-27-71-00ZZZ-720Z-A
Ref. MP A350-A-57-27-71-01ZZZ-520Z-A
Ref. MP A350-A-57-27-71-01ZZZ-720Z-A
Ref. MP A350-A-28-12-82-00ZZZ-520Z-A
Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
CONF 002
Referenced tools for task set A350-A-57-XX-P074-01000-93AA-A Application of
Sealant to the Upper Rib Feet
T o accomplish this Service Bulletin it is necessary to use the tools listed in:
Ref. MP A350-A-57-27-71-00ZZZ-520Z-A
Ref. MP A350-A-57-27-71-00ZZZ-720Z-A
Ref. MP A350-A-57-27-71-01ZZZ-520Z-A
Ref. MP A350-A-57-27-71-01ZZZ-720Z-A
Ref. MP A350-A-28-12-82-00ZZZ-520Z-A
Ref. MP A350-A-28-12-82-00ZZZ-720Z-A

### Page 13

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 13
CONF ALL
C. CONSUMABLES
CONF 001
Consumables for task set A350-A-57-XX-P074-01000-93AA-A Application of
Sealant to the Upper Rib Feet
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
06ABA1 Polysulfide Sealant - FuelT ank Brushable
06ABB1 Polysulfide Sealant - FuelT ank Fillet
06PAG1 Adhesion Promoter - ForPolysulfide Sealant
08BBF1 Non Aqueous Cleaner - -Methyl-Ethyl-Ketone
14SBA1 T extile - Lint free Cotton
CONF 002
Consumables for task set A350-A-57-XX-P074-01000-93AA-A Application of
Sealant to the Upper Rib Feet
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
06ABA1 Polysulfide Sealant - FuelT ank Brushable
06ABB1 Polysulfide Sealant - FuelT ank Fillet
06PAG1 Adhesion Promoter - ForPolysulfide Sealant
08BBF1 Non Aqueous Cleaner - -Methyl-Ethyl-Ketone
14SBA1 T extile - Lint free Cotton
CONF 001
Referenced consumables for task set A350-A-57-XX-P074-01000-93AA-A
Application of Sealant to the Upper Rib Feet
T o accomplish this Service Bulletin it is necessary to use the consumable materials listed in:
Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. MP A350-A-28-12-62-04ZZZ-720Z-A
Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. MP A350-A-28-12-62-05ZZZ-720Z-A
Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. MP A350-A-28-12-62-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
Ref. MP A350-A-57-27-71-00ZZZ-720Z-A

### Page 14

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 14
Ref. MP A350-A-57-27-71-01ZZZ-720Z-A
Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
CONF 002
Referenced consumables for task set A350-A-57-XX-P074-01000-93AA-A
Application of Sealant to the Upper Rib Feet
T o accomplish this Service Bulletin it is necessary to use the consumable materials listed in:
Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. MP A350-A-28-12-62-04ZZZ-720Z-A
Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. MP A350-A-28-31-61-01ZZZ-720Z-A
Ref. MP A350-A-28-31-61-02ZZZ-720Z-A
Ref. MP A350-A-28-12-62-05ZZZ-720Z-A
Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. MP A350-A-28-12-62-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
Ref. MP A350-A-57-27-71-00ZZZ-720Z-A
Ref. MP A350-A-57-27-71-01ZZZ-720Z-A
Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
CONF ALL
D. LIST OF NEW PARTS
CONF 001
Referenced parts for task set A350-A-57-XX-P074-01000-93AA-A Application of
Sealant to the Upper Rib Feet
T o accomplish this Service Bulletin it is necessary to use the expendable parts listed in:
Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. MP A350-A-28-12-62-04ZZZ-720Z-A
Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. MP A350-A-28-12-62-05ZZZ-720Z-A
Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. MP A350-A-28-12-62-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-00ZZZ-720Z-A

### Page 15

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 15
CONF 002
Referenced parts for task set A350-A-57-XX-P074-01000-93AA-A Application of
Sealant to the Upper Rib Feet
T o accomplish this Service Bulletin it is necessary to use the expendable parts listed in:
Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. MP A350-A-28-12-62-04ZZZ-720Z-A
Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. MP A350-A-28-31-61-01ZZZ-720Z-A
Ref. MP A350-A-28-31-61-02ZZZ-720Z-A
Ref. MP A350-A-28-12-62-05ZZZ-720Z-A
Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. MP A350-A-28-12-62-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
CONF ALL
E. LIST OF EXISTING PARTS
No parts

### Page 16

A350
SERVICE BULLETIN
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Page 16
3. ACCOMPLISHMENT INSTRUCTIONS
Task set A350-A-57-XX-P074-01000-93AA-A (A350-A-57-XX-P074-01ZZZ-93AZ-A)
Application of Sealant to the Upper Rib Feet
WARNING: MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND ALL THE CAUTIONS
INCLUDED IN THE REFERENCED PROCEDURES.
WARNING: THIS PROCEDURE USES A FUEL SYSTEM ITEM THAT IS IN A CATEGORY
KNOWN AS A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION
(CDCCL) CDCCL IDENTIFIES AN ITEM THAT CAN BE THE SOURCE OF A
POSSIBLE FUEL TANK IGNITION. YOU MUST KEEP ALL CDCCL ITEMS IN THE
APPROVED CONFIGURATION. DAMAGE, WEAR OR CHANGES TO A CDCCL
ITEM CAN CAUSE A POSSIBLE FUEL TANK EXPLOSION.
CAUTION: ALWAYS OBEY THE PRECAUTIONS THAT FOLLOW TO KEEP ELECTRICAL
WIRING IN A SATISFACTORY CONDITION (ELECTRICALLY AND MECHANICALLY
SERVICEABLE). WHEN YOU DO A MAINTENANCE WORK, REPAIRS OR
MODIFICATIONS, ALWAYS KEEP ELECTRICAL WIRING, COMPONENTS AND
THE WORK AREA AS CLEAN AS POSSIBLE. TO DO THIS:
- PUT PROTECTION, SUCH AS PLASTIC SHEETING, CLOTHS, ETC., AS
NECESSARY ON WIRING AND COMPONENTS.
- REGULARLY REMOVE ALL SHAVINGS, UNWANTED MATERIAL AND
OTHER CONTAMINATION.
THESE PRECAUTIONS WILL DECREASE THE RISK OF CONTAMINATION AND
DAMAGE TO THE ELECTRICAL WIRING INSTALLATION.
IF THERE IS CONTAMINATION, REFER TO Ref. ESP A350-A-20-55-XX-01ZZZ-
042Z-A.
NOTE: The accomplishment instructions of this Service Bulletin include procedures given in
other documents or in other sections of the Service Bulletin. When the words “refer to”
are used and the operator has a procedure accepted by the local authority he belongs to,
the accepted alternative procedure can be used. When the words “in accordance with”
are used then the given procedure must be followed.
NOTE: The access and close-up instructions, not comprising return to service tests, in this
Service Bulletin do not constitute or affect the technical intent of the Service Bulletin.
Operators can therefore, as deemed necessary, omit or add access and/or close-up steps
to add flexibility to their maintenance operations as long as the technical intent of the
Service Bulletin is met within the set parameters.
NOTE: Manual titles given in the accomplishment instructions are referred to by acronyms. Refer
to paragraph 1.J., References, for the definition of acronyms.
NOTE: This Service Bulletin is classified mandatory or expected to be classified mandatory by
an Airworthiness Directive (AD). The paragraphs 3.C. and 3.E. in these accomplishment
instructions are Required for Compliance (RC) and must be done to comply with the AD.
T o allow more flexibility, the rule "refer to" and "in accordance with" will apply to these
paragraphs 3.C. and 3.E. Other paragraphs are recommended and may be deviated from,
done as part of other actions or done with accepted methods different from those given
in the Service Bulletin, as long as the RC paragraphs can be done and the aircraft can be
put back into a serviceable condition.
NOTE: This Service Bulletin contains the instructions for the on-aircraft maintenance necessary
to ensure the continued airworthiness of the aircraft.
For any deviations to the instructions, including Required for Compliance paragraph
contained herein, contact AIRBUS for further instructions and approval.
A. TASK SET ASSOCIATED INFORMATION

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Page 17
CONF 001
Maintenance Configuration
Fuel tanks opened
CONF 002
Maintenance Configuration
Fuel tanks opened
Task Manpower
CONF 001
TOTAL MAN-HOURS 90.75 h
CONF 002
TOTAL MAN-HOURS 102.75 h
CONF 001
ELAPSED TIME (HOURS) 17.75 h
CONF 002
ELAPSED TIME (HOURS) 19.50 h
CONF ALL
B. PREPARATION
(1) Task A350-A-57-XX-P074-01001-540A-A (A350-A-57-XX-P074-01ZZZ-540Z-A)
Job Set-up
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 0.25 h
Minimum Number of person 1
Elapsed Time 0.25 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
INTRO A350-A-00-61-04-11ZZZ-018Z-D
MP A350-A-24-41-XX-00ZZZ-170Z-A
Procedure
NOTE: For the basic Aircraft configuration, refer to Ref. INTRO A350-A-00-61-04-
11ZZZ-018Z-D “Maintenance Procedure - Introduction”.
(a) Make sure that the aircraft is electrically grounded, refer to Ref. MP A350-A-24-
41-XX-00ZZZ-170Z-A.
(2) Task A350-A-57-XX-P074-02001-540A-A (A350-A-57-XX-P074-02ZZZ-540Z-A)
Open the LH Wing Access Covers and Access Doors
WARNING: MAKE SURE THE AREA AROUND THE AIRCRAFT IS SAFE BEFORE
YOU START A REFUEL/DEFUEL PROCEDURE. IN THIS SAFE AREA,
DO NOT LET PERSONS:
- SMOKE
- MAKE SPARKS OR FIRE
- USE EQUIPMENT THAT IS NOT APPROVED FOR THE TASK.
AIRCRAFT FUEL IS FLAMMABLE.

### Page 18

A350
SERVICE BULLETIN
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Page 18
WARNING: BEFORE YOU DO WORK ON THE FUEL SYSTEM, MAKE SURE THAT
YOU OBEY THE FUEL SAFETY PROCEDURES. THIS WILL PREVENT
INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500
Manpower/Resources/Skills
Man-hours 11.50 h
Minimum Number of person 2
Elapsed Time 5.75 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-82-00ZZZ-520Z-A
A350-A-57-27-71-00ZZZ-520Z-A
A350-A-57-27-71-01ZZZ-520Z-A
Procedure
(a) Do the Job Set-up procedure as specified in the Removal of the Fuel T ank Access
- Covers, refer to Ref. MP A350-A-57-27-71-00ZZZ-520Z-A.
(b) Do the Job Set-up procedure as specified in the Removal of the NACA-Duct Panel
Assembly - Surge T ank, refer to Ref. MP A350-A-28-12-82-00ZZZ-520Z-A.
(c) Remove the fuel tank access covers Panel 541AB, Panel 541BB, Panel 541CB,
Panel 541DB, Panel 541EB, Panel 542AB, Panel 542BB, Panel 542DB, Panel
542EB, Panel 542FB, Panel 542GB, Panel 542HB, Panel 542JB, Panel 542KB, Panel
542LB, Panel 542MB, Panel 542NB, and Panel 543EB, refer to Ref. MP A350-A-57-
27-71-00ZZZ-520Z-A.
(d) Remove the tank internal doors Door 541BZ, Door 541CZ, and Door 542AZ, refer
to Ref. MP A350-A-57-27-71-01ZZZ-520Z-A.
(e) Remove the NACA-Duct panel assembly between Rib 26 and Rib 27, refer to Ref.
MP A350-A-28-12-82-00ZZZ-520Z-A.
CONF 001
(3) Task A350-A-57-XX-P074-01001-520A-A (A350-A-57-XX-P074-01ZZZ-520Z-A)
Remove the Pipes in the LH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 8.00 h
Minimum Number of person 4

### Page 19

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SERVICE BULLETIN
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Page 19
Elapsed Time 2.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-62-04ZZZ-520Z-A
A350-A-28-12-62-05ZZZ-520Z-A
A350-A-28-12-62-06ZZZ-520Z-A
A350-A-28-12-63-00ZZZ-520Z-A
A350-A-28-12-63-01ZZZ-520Z-A
A350-A-28-12-63-06ZZZ-520Z-A
A350-A-28-12-63-07ZZZ-520Z-A
A350-A-47-20-62-00ZZZ-520Z-A
Procedure
(a) Remove the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-
12-63-07ZZZ-520Z-A.
(b) Remove the pipes of the AFT inert gas generation system between Rib 12 and
Rib 22, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(c) Remove the pipes of the FWD inert gas generation system between Rib 14 and
Rib 16, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(d) Remove the vent pipes between Rib 14 and Rib 16, refer to Ref. MP A350-A-28-
12-62-04ZZZ-520Z-A.
(e) Remove the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
62-05ZZZ-520Z-A.
(f) Remove the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-520Z-A.
(g) Remove the pipes of the FWD inert gas generation system between Rib 18 and
Rib 20, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(h) Remove the vent pipe between Rib 19 and Rib 20, refer to Ref. MP A350-A-28-12-
62-06ZZZ-520Z-A.
(i) Remove the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-
12-63-06ZZZ-520Z-A.
(j) Remove the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-520Z-A.
CONF 002
(3) Task A350-A-57-XX-P074-01002-520A-A (A350-A-57-XX-P074-01ZZZ-520Z-A)
Remove the Pipes in the LH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 11.00 h
Minimum Number of person 4
Elapsed Time 2.75 h

### Page 20

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 20
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-62-04ZZZ-520Z-A
A350-A-28-12-62-05ZZZ-520Z-A
A350-A-28-12-62-06ZZZ-520Z-A
A350-A-28-12-63-00ZZZ-520Z-A
A350-A-28-12-63-01ZZZ-520Z-A
A350-A-28-12-63-06ZZZ-520Z-A
A350-A-28-12-63-07ZZZ-520Z-A
A350-A-28-25-61-03ZZZ-520Z-A
A350-A-28-25-61-05ZZZ-520Z-A
A350-A-28-31-61-01ZZZ-520Z-A
A350-A-28-31-61-02ZZZ-520Z-A
A350-A-47-20-62-00ZZZ-520Z-A
Procedure
(a) Remove the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-
12-63-07ZZZ-520Z-A.
(b) Remove the pipes of the refuel gallery between Rib 12 and Rib 15, refer to Ref.
MP A350-A-28-25-61-03ZZZ-520Z-A.
(c) Remove the pipes of the AFT inert gas generation system between Rib 12 and
Rib 22, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(d) Remove the pipes of the FWD inert gas generation system between Rib 14 and
Rib 16, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(e) Remove the vent pipes between Rib 14 and Rib 16, refer to Ref. MP A350-A-28-
12-62-04ZZZ-520Z-A.
(f) Remove the pipes of the refuel gallery between Rib 15 and Rib 16, refer to Ref.
MP A350-A-28-25-61-05ZZZ-520Z-A.
(g) Remove the fuel jettison pipe between Rib 15 and Rib 16, refer to Ref. MP A350-
A-28-31-61-01ZZZ-520Z-A.
(h) Remove the fuel jettison pipes between Rib 16 and Rib 22, refer to Ref. MP A350-
A-28-31-61-02ZZZ-520Z-A.
(i) Remove the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
62-05ZZZ-520Z-A.
(j) Remove the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-520Z-A.
(k) Remove the pipes of the FWD inert gas generation system between Rib 18 and
Rib 20, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(l) Remove the vent pipe between Rib 19 and Rib 20, refer to Ref. MP A350-A-28-12-
62-06ZZZ-520Z-A.
(m) Remove the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-
12-63-06ZZZ-520Z-A.

### Page 21

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 21
(n) Remove the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-520Z-A.
CONF ALL
(4) Task A350-A-57-XX-P074-03001-540A-A (A350-A-57-XX-P074-03ZZZ-540Z-A)
Open the RH Wing Access Covers and Access Doors
WARNING: MAKE SURE THE AREA AROUND THE AIRCRAFT IS SAFE BEFORE
YOU START A REFUEL/DEFUEL PROCEDURE. IN THIS SAFE AREA,
DO NOT LET PERSONS:
- SMOKE
- MAKE SPARKS OR FIRE
- USE EQUIPMENT THAT IS NOT APPROVED FOR THE TASK.
AIRCRAFT FUEL IS FLAMMABLE.
WARNING: BEFORE YOU DO WORK ON THE FUEL SYSTEM, MAKE SURE THAT
YOU OBEY THE FUEL SAFETY PROCEDURES. THIS WILL PREVENT
INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600
Manpower/Resources/Skills
Man-hours 11.50 h
Minimum Number of person 2
Elapsed Time 5.75 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-82-00ZZZ-520Z-A
A350-A-57-27-71-00ZZZ-520Z-A
A350-A-57-27-71-01ZZZ-520Z-A
Procedure
(a) Do the Job Set-up procedure as specified in the Removal of the Fuel T ank Access
- Covers, refer to Ref. MP A350-A-57-27-71-00ZZZ-520Z-A.
(b) Do the Job Set-up procedure as specified in the Removal of the NACA-Duct Panel
Assembly - Surge T ank, refer to Ref. MP A350-A-28-12-82-00ZZZ-520Z-A.
(c) Remove the fuel tank access covers Panel 641AB, Panel 641BB, Panel 641CB,
Panel 641DB, Panel 641EB, Panel 642AB, Panel 642BB, Panel 642DB, Panel
642EB, Panel 642FB, Panel 642GB, Panel 642HB, Panel 642JB, Panel 642KB, Panel
642LB, Panel 642MB, Panel 642NB, and Panel 643EB, refer to Ref. MP A350-A-57-
27-71-00ZZZ-520Z-A.
(d) Remove the tank internal doors Door 641BZ, Door 641CZ, and Door 642AZ, refer
to Ref. MP A350-A-57-27-71-01ZZZ-520Z-A.

### Page 22

A350
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Page 22
(e) Remove the NACA-Duct panel assembly between Rib 26 and Rib 27, refer to Ref.
MP A350-A-28-12-82-00ZZZ-520Z-A.
CONF 001
(5) Task A350-A-57-XX-P074-02001-520A-A (A350-A-57-XX-P074-02ZZZ-520Z-A)
Remove the Pipes in the RH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 8.00 h
Minimum Number of person 4
Elapsed Time 2.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-63-00ZZZ-520Z-A
A350-A-28-12-63-01ZZZ-520Z-A
A350-A-28-12-63-06ZZZ-520Z-A
A350-A-28-12-63-07ZZZ-520Z-A
A350-A-28-25-61-03ZZZ-520Z-A
A350-A-28-25-61-05ZZZ-520Z-A
A350-A-47-20-62-00ZZZ-520Z-A
Procedure
(a) Remove the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-
12-63-07ZZZ-520Z-A.
(b) Remove the pipes of the refuel gallery between Rib 12 and Rib 15, refer to Ref.
MP A350-A-28-25-61-03ZZZ-520Z-A.
(c) Remove the pipes of the AFT inert gas generation system between Rib 12 and
Rib 22, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(d) Remove the pipes of the FWD inert gas generation system between Rib 14 and
Rib 16, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(e) Remove the pipe of the refuel gallery between Rib 15 and Rib 16, refer to Ref. MP
A350-A-28-25-61-05ZZZ-520Z-A.
(f) Remove the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-520Z-A.
(g) Remove the pipes of the FWD inert gas generation system between Rib 18 and
Rib 20, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(h) Remove the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-
12-63-06ZZZ-520Z-A.

### Page 23

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Page 23
(i) Remove the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-520Z-A.
CONF 002
(5) Task A350-A-57-XX-P074-02002-520A-A (A350-A-57-XX-P074-02ZZZ-520Z-A)
Remove the Pipes in the RH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 10.00 h
Minimum Number of person 4
Elapsed Time 2.50 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-63-00ZZZ-520Z-A
A350-A-28-12-63-01ZZZ-520Z-A
A350-A-28-12-63-06ZZZ-520Z-A
A350-A-28-12-63-07ZZZ-520Z-A
A350-A-28-25-61-03ZZZ-520Z-A
A350-A-28-25-61-05ZZZ-520Z-A
A350-A-28-31-61-01ZZZ-520Z-A
A350-A-28-31-61-02ZZZ-520Z-A
A350-A-47-20-62-00ZZZ-520Z-A
Procedure
(a) Remove the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-
12-63-07ZZZ-520Z-A.
(b) Remove the pipes of the refuel gallery between Rib 12 and Rib 15, refer to Ref.
MP A350-A-28-25-61-03ZZZ-520Z-A.
(c) Remove the pipes of the AFT inert gas generation system between Rib 12 and
Rib 22, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(d) Remove the pipes of the FWD inert gas generation system between Rib 14 and
Rib 16, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.
(e) Remove the pipes of the refuel gallery between Rib 15 and Rib 16, refer to Ref.
MP A350-A-28-25-61-05ZZZ-520Z-A.
(f) Remove the fuel jettison pipe between Rib 15 and Rib 16, refer to Ref. MP A350-
A-28-31-61-01ZZZ-520Z-A.
(g) Remove the fuel jettison pipes between Rib 16 and Rib 22, refer to Ref. MP A350-
A-28-31-61-02ZZZ-520Z-A.
(h) Remove the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-520Z-A.
(i) Remove the pipes of the FWD inert gas generation system between Rib 18 and
Rib 20, refer to Ref. MP A350-A-47-20-62-00ZZZ-520Z-A.

### Page 24

A350
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Page 24
(j) Remove the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-
12-63-06ZZZ-520Z-A.
(k) Remove the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-520Z-A.
CONF ALL
C. PROCEDURE
(1) Task A350-A-57-XX-P074-01001-257A-A (A350-A-57-XX-P074-01ZZZ-257Z-A)
Apply Sealant to the Upper Rib Feet in the LH Wing
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500 Work location From Rib 3 to Rib 27
Manpower/Resources/Skills
Man-hours 2.00 h
Minimum Number of person 4
Elapsed Time 0.50 h
Skills Airframe
Material necessary to do the job
Consumables
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
06ABA1 Polysulfide Sealant - FuelT ank Brushable
06ABB1 Polysulfide Sealant - FuelT ank Fillet
06PAG1 Adhesion Promoter - ForPolysulfide Sealant
08BBF1 Non Aqueous Cleaner - -Methyl-Ethyl-Ketone
14SBA1 T extile - Lint free Cotton
Referenced Information
Manuals/Drawings References/Sheets
ASR A350-A-51-24-XX-01ZZZ-667Z-AA350-A-51-76-12-00ZZZ-660Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-57-2X-XX-01ZZZ-04CZ-A
CML CONSUMABLE MATERIAL LIST (CML)
Procedure
Ref. Fig.BA Application of Sealant to the Upper Rib Feet
(a) Standard Practices given in this procedure:
1 For identification of zones, refer to Ref. SD A350-A-06-3X-XX-01ZZZ-04CZ-A.
2 For the identification of the ribs, refer to Ref. SD A350-A-57-2X-XX-01ZZZ-
04CZ-A.

### Page 25

A350
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Page 25
3 For the specification of Material application codes given in this Service
Bulletin, refer to Ref. CML.
4 Apply sealant in accordance with Ref. ASR A350-A-51-24-XX-01ZZZ-667Z-A
and Ref. ASR A350-A-51-76-12-00ZZZ-660Z-A.
(b) Clean the working area with:
  T extile - Lint free Cotton14SBA1  
made moist with:
  Non Aqueous Cleaner - -
Methyl-Ethyl-Ketone
08BBF1  
(c) Apply adhesion promoter to areas being filled or sealed, refer to Sheet 2 and
Sheet 4, Section B-B or Sheet 3 and Sheet 5, Section C-C. With:
  Adhesion Promoter - For
Polysulfide Sealant
06PAG1  
NOTE: If the rib foot does not extend beyond the stringer edge, refer to Sheet 2
and Sheet 4, Section B-B.
If the rib foot extends beyond the stringer edge, refer to Sheet 3 and
Sheet 5, Section C-C.
(d) Fill the void under the rib foot, refer to Sheet 2 and Sheet 4, Section B-B or Sheet
3 and Sheet 5, Section C-C. With:
  Polysulfide Sealant -
Fuel T ank Brushable
06ABA1  
or
  Polysulfide Sealant -
Fuel T ank Fillet
06ABB1  
NOTE: If the rib foot does not extend beyond the stringer edge, refer to Sheet 2
and Sheet 4, Section B-B.
If the rib foot extends beyond the stringer edge, refer to Sheet 3 and
Sheet 5, Section C-C.
(e) Apply fillet sealant around the rib feet, refer to Sheet 2, Sheet 3, and Sheet 4,
Section A-A. With:
  Polysulfide Sealant -
Fuel T ank Fillet
06ABB1  
(f) Apply the overlapping sealant as necessary to join existing fillet seal around the
rib foot and the stringers overlapping sealant, refer to Sheet 2, Sheet 3, and
Sheet 4, Section A-A. With:
  Polysulfide Sealant -
Fuel T ank Brushable
06ABA1  
or
  Polysulfide Sealant -
Fuel T ank Fillet
06ABB1

### Page 26

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTR-A-001-01 Fig.BA Sol.AA SHEET 1/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 26
CONF ALL
RIBS, LOWER STRINGERS AND WING LOWER COVER NOT SHOWN
VIEW LOOKING UP
A
RIB1
RIB3
RIB5
RIB6
RIB7
RIB8
RIB10
RIB13
RIB15
RIB17
RIB19
RIB21
RIB27
STGR3
STGR4
STGR6
STGR11
STGR12
STGR13
STGR14
STGR15
STGR16
STGR17
STGR18
F
W
DINBD
STGR1
STGR2 Z500
Z600
LH
RH
LH SHOWN
RH SYMMETRICAL
A
STGR19
RH SYMMETRICAL
LH SHOWN
B C
B C
B C B C
B C
B C
B C
B C
B C
B C
B C
B C
B C
B C
B C
ICN-A350-A-57XXP074-A-FAPE3-06GTR-A-001-01

### Page 27

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTS-A-001-01 Fig.BA Sol.AA SHEET 2/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 27
CONF ALL
NOTE:
FOR FLAG NOTES, SEE SHEET 05
TYPICAL VIEW
VIEW LOOKING UP
A
A
B
B
MIN 25 mm
(0.985 in)04
MIN 25 mm
(0.985 in) 04
MIN 25 mm
(0.985 in) 04
STRINGER
UPPER COVER
STRINGER
01
01
01
01
MIN 25 mm
(0.985 in)04
03
03
02
RIB FOOT
RIB FOOT
03
05
B
A
A
ICN-A350-A-57XXP074-A-FAPE3-06GTS-A-001-01

### Page 28

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTT-A-001-01 Fig.BA Sol.AA SHEET 3/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 28
CONF ALL
NOTE:
FOR FLAG NOTES, SEE SHEET 05
TYPICAL VIEW
VIEW LOOKING UP
A
A
MIN 25 mm
(0.985 in)04
MIN 25 mm
(0.985 in) 04
MIN 25 mm
(0.985 in) 04
STRINGER
UPPER COVER
STRINGER
01
01
01
01
MIN 25 mm
(0.985 in)04
03
03
02
RIB FOOT
RIB FOOT
03
06
C
C
C
ICN-A350-A-57XXP074-A-FAPE3-06GTT-A-001-01

### Page 29

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTU-A-001-01 Fig.BA Sol.AA SHEET 4/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 29
CONF ALL
AA
OVERLAPPING SEALANT
FILLET SEALANT
STRINGER
UPPER COVER
01
6 mm TO 12 mm
(0.237 in TO 0.472 in)
01
STRINGER
B B
UPPER COVERRIB FOOT
0102
07
03
TYPICAL VIEW
TYPICAL VIEW
NOTE:
FOR FLAG NOTES, SEE SHEET 05
ICN-A350-A-57XXP074-A-FAPE3-06GTU-A-001-01

### Page 30

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTV-A-001-01 Fig.BA Sol.AA SHEET 5/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 30
CONF ALL
NOTE:
06 IF THE END OF THE RIB FOOT EXTENDS BEYOND THE STRINGER EDGE, APPLY THE OVERLAPPING
SEALANT ON THE VISIBLE STRINGER EDGE JOINING UP WITH THE FILLET SEAL OF THE RIB FOOT
EDGE WITH NO GAPS PRESENT
APPLY MATERIAL No 06ABA1 AS OVERLAPPING SEALANT AS NECESSARY TO ENSURE THAT07
EDGE AND CORNER / RADIUS OF THE COMPONENT SHALL NOT BE VISIBLE.  IF NECESSARY
USE MATERIAL No 06ABB1 FOR THE FILLET SEAL
03 APPLY MATERIAL No 06ABB1 AS FILLET SEALANT
THE FILLET SEAL MUST EXTEND A MINIMUM OF 25 mm (0.985 in) PAST THE RIB FOOT AND, IF04
PRESENT, JOIN ANY EXISTING FILLET SEALANT ON THE STRINGER EDGE TO FORM A
CONTINUOUS FILLET SEAL
02 APPLY MATERIAL No 06ABA1 OR 06ABB1 TO THE GAP BETWEEN THE STRINGERS AND RIB FOOT. 
GAPS AND VOIDS TO BE COMPLETLY FILLED.  FILL VOID PROGRESSIVELY TO AVOID FORMING AIR 
GAPS
01 APPLY MATERIAL No 06PAG1
C CTYPICAL VIEW
STRINGER UPPER COVERRIB FOOT
01
01
06
02
02
05 CASE WHERE RIB FOOT DOES NOT EXTEND BEYOND THE STRINGER EDGE. APPLY MATERIAL No
06ABA1 AS NECESSARY TO ENSURE ANY VISIBLE STRINGER EDGE IS COVERED. BLEND IN WITH
ADJACENT STRINGER EDGE FILLET SEALANT.
ICN-A350-A-57XXP074-A-FAPE3-06GTV-A-001-01

### Page 31

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 31
(2) Task A350-A-57-XX-P074-02001-257A-A (A350-A-57-XX-P074-02ZZZ-257Z-A)
Apply Sealant to the Upper Rib Feet in the RH Wing
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600 Work location From Rib 3 to Rib 27
Manpower/Resources/Skills
Man-hours 2.00 h
Minimum Number of person 4
Elapsed Time 0.50 h
Skills Airframe
Material necessary to do the job
Consumables
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
06ABA1 Polysulfide Sealant - FuelT ank Brushable
06ABB1 Polysulfide Sealant - FuelT ank Fillet
06PAG1 Adhesion Promoter - ForPolysulfide Sealant
08BBF1 Non Aqueous Cleaner - -Methyl-Ethyl-Ketone
14SBA1 T extile - Lint free Cotton
Referenced Information
Manuals/Drawings References/Sheets
ASR A350-A-51-24-XX-01ZZZ-667Z-AA350-A-51-76-12-00ZZZ-660Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-57-2X-XX-01ZZZ-04CZ-A
CML CONSUMABLE MATERIAL LIST (CML)
Procedure
Ref. Fig.BA Application of Sealant to the Upper Rib Feet
(a) Standard Practices given in this procedure:
1 For identification of zones, refer to Ref. SD A350-A-06-3X-XX-01ZZZ-04CZ-A.
2 For the identification of the ribs, refer to Ref. SD A350-A-57-2X-XX-01ZZZ-
04CZ-A.
3 For the specification of Material application codes given in this Service
Bulletin, refer to Ref. CML.
4 Apply sealant in accordance with Ref. ASR A350-A-51-24-XX-01ZZZ-667Z-A
and Ref. ASR A350-A-51-76-12-00ZZZ-660Z-A.
(b) Clean the working area with:
  T extile - Lint free Cotton14SBA1

### Page 32

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 32
made moist with:
  Non Aqueous Cleaner - -
Methyl-Ethyl-Ketone
08BBF1  
(c) Apply adhesion promoter to areas being filled or sealed, refer to Sheet 2 and
Sheet 4, Section B-B or Sheet 3 and Sheet 5, Section C-C. With:
  Adhesion Promoter - For
Polysulfide Sealant
06PAG1  
NOTE: If the rib foot does not extend beyond the stringer edge, refer to Sheet 2
and Sheet 4, Section B-B.
If the rib foot extends beyond the stringer edge, refer to Sheet 3 and
Sheet 5, Section C-C.
(d) Fill the void under the rib foot, refer to Sheet 2 and Sheet 4, Section B-B or Sheet
3 and Sheet 5, Section C-C. With:
  Polysulfide Sealant -
Fuel T ank Brushable
06ABA1  
or
  Polysulfide Sealant -
Fuel T ank Fillet
06ABB1  
NOTE: If the rib foot does not extend beyond the stringer edge, refer to Sheet 2
and Sheet 4, Section B-B.
If the rib foot extends beyond the stringer edge, refer to Sheet 3 and
Sheet 5, Section C-C.
(e) Apply fillet sealant around the rib feet, refer to Sheet 2, Sheet 3, and Sheet 4,
Section A-A. With:
  Polysulfide Sealant -
Fuel T ank Fillet
06ABB1  
(f) Apply the overlapping sealant as necessary to join existing fillet seal around the
rib foot and the stringers overlapping sealant, refer to Sheet 2, Sheet 3, and
Sheet 4, Section A-A. With:
  Polysulfide Sealant -
Fuel T ank Brushable
06ABA1  
or
  Polysulfide Sealant -
Fuel T ank Fillet
06ABB1

### Page 33

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTR-A-001-01 Fig.BA Sol.AA SHEET 1/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 33
CONF ALL
RIBS, LOWER STRINGERS AND WING LOWER COVER NOT SHOWN
VIEW LOOKING UP
A
RIB1
RIB3
RIB5
RIB6
RIB7
RIB8
RIB10
RIB13
RIB15
RIB17
RIB19
RIB21
RIB27
STGR3
STGR4
STGR6
STGR11
STGR12
STGR13
STGR14
STGR15
STGR16
STGR17
STGR18
F
W
DINBD
STGR1
STGR2 Z500
Z600
LH
RH
LH SHOWN
RH SYMMETRICAL
A
STGR19
RH SYMMETRICAL
LH SHOWN
B C
B C
B C B C
B C
B C
B C
B C
B C
B C
B C
B C
B C
B C
B C
ICN-A350-A-57XXP074-A-FAPE3-06GTR-A-001-01

### Page 34

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTS-A-001-01 Fig.BA Sol.AA SHEET 2/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 34
CONF ALL
NOTE:
FOR FLAG NOTES, SEE SHEET 05
TYPICAL VIEW
VIEW LOOKING UP
A
A
B
B
MIN 25 mm
(0.985 in)04
MIN 25 mm
(0.985 in) 04
MIN 25 mm
(0.985 in) 04
STRINGER
UPPER COVER
STRINGER
01
01
01
01
MIN 25 mm
(0.985 in)04
03
03
02
RIB FOOT
RIB FOOT
03
05
B
A
A
ICN-A350-A-57XXP074-A-FAPE3-06GTS-A-001-01

### Page 35

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTT-A-001-01 Fig.BA Sol.AA SHEET 3/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 35
CONF ALL
NOTE:
FOR FLAG NOTES, SEE SHEET 05
TYPICAL VIEW
VIEW LOOKING UP
A
A
MIN 25 mm
(0.985 in)04
MIN 25 mm
(0.985 in) 04
MIN 25 mm
(0.985 in) 04
STRINGER
UPPER COVER
STRINGER
01
01
01
01
MIN 25 mm
(0.985 in)04
03
03
02
RIB FOOT
RIB FOOT
03
06
C
C
C
ICN-A350-A-57XXP074-A-FAPE3-06GTT-A-001-01

### Page 36

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTU-A-001-01 Fig.BA Sol.AA SHEET 4/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 36
CONF ALL
AA
OVERLAPPING SEALANT
FILLET SEALANT
STRINGER
UPPER COVER
01
6 mm TO 12 mm
(0.237 in TO 0.472 in)
01
STRINGER
B B
UPPER COVERRIB FOOT
0102
07
03
TYPICAL VIEW
TYPICAL VIEW
NOTE:
FOR FLAG NOTES, SEE SHEET 05
ICN-A350-A-57XXP074-A-FAPE3-06GTU-A-001-01

### Page 37

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTV-A-001-01 Fig.BA Sol.AA SHEET 5/5
REV 00 Jun 24/22 A350-57-P074Application of Sealant to the Upper Rib Feet
Page 37
CONF ALL
NOTE:
06 IF THE END OF THE RIB FOOT EXTENDS BEYOND THE STRINGER EDGE, APPLY THE OVERLAPPING
SEALANT ON THE VISIBLE STRINGER EDGE JOINING UP WITH THE FILLET SEAL OF THE RIB FOOT
EDGE WITH NO GAPS PRESENT
APPLY MATERIAL No 06ABA1 AS OVERLAPPING SEALANT AS NECESSARY TO ENSURE THAT07
EDGE AND CORNER / RADIUS OF THE COMPONENT SHALL NOT BE VISIBLE.  IF NECESSARY
USE MATERIAL No 06ABB1 FOR THE FILLET SEAL
03 APPLY MATERIAL No 06ABB1 AS FILLET SEALANT
THE FILLET SEAL MUST EXTEND A MINIMUM OF 25 mm (0.985 in) PAST THE RIB FOOT AND, IF04
PRESENT, JOIN ANY EXISTING FILLET SEALANT ON THE STRINGER EDGE TO FORM A
CONTINUOUS FILLET SEAL
02 APPLY MATERIAL No 06ABA1 OR 06ABB1 TO THE GAP BETWEEN THE STRINGERS AND RIB FOOT. 
GAPS AND VOIDS TO BE COMPLETLY FILLED.  FILL VOID PROGRESSIVELY TO AVOID FORMING AIR 
GAPS
01 APPLY MATERIAL No 06PAG1
C CTYPICAL VIEW
STRINGER UPPER COVERRIB FOOT
01
01
06
02
02
05 CASE WHERE RIB FOOT DOES NOT EXTEND BEYOND THE STRINGER EDGE. APPLY MATERIAL No
06ABA1 AS NECESSARY TO ENSURE ANY VISIBLE STRINGER EDGE IS COVERED. BLEND IN WITH
ADJACENT STRINGER EDGE FILLET SEALANT.
ICN-A350-A-57XXP074-A-FAPE3-06GTV-A-001-01

### Page 38

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 38
D. PREPARATION FOR TEST
CONF 001
(1) Task A350-A-57-XX-P074-01001-720A-A (A350-A-57-XX-P074-01ZZZ-720Z-A)
Install the Pipes in the LH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 12.00 h
Minimum Number of person 4
Elapsed Time 3.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-62-04ZZZ-720Z-A
A350-A-28-12-62-05ZZZ-720Z-A
A350-A-28-12-62-06ZZZ-720Z-A
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-720Z-A
Procedure
(a) Install the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-12-
63-07ZZZ-720Z-A.
(b) Install the pipes of the AFT inert gas generation system between Rib 12 and Rib
22, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(c) Install the pipes of the FWD inert gas generation system between Rib 14 and Rib
16, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(d) Install the vent pipes between Rib 14 and Rib 16, refer to Ref. MP A350-A-28-12-
62-04ZZZ-720Z-A.
(e) Install the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
62-05ZZZ-720Z-A.
(f) Install the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-720Z-A.
(g) Install the pipes of the FWD inert gas generation system between Rib 18 and Rib
20, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(h) Install the vent pipe between Rib 19 and Rib 20, refer to Ref. MP A350-A-28-12-
62-06ZZZ-720Z-A.
(i) Install the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-12-
63-06ZZZ-720Z-A.

### Page 39

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 39
(j) Install the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-720Z-A.
CONF 002
(1) Task A350-A-57-XX-P074-01002-720A-A (A350-A-57-XX-P074-01ZZZ-720Z-A)
Install the Pipes in the LH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 16.00 h
Minimum Number of person 4
Elapsed Time 4.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-62-04ZZZ-720Z-A
A350-A-28-12-62-05ZZZ-720Z-A
A350-A-28-12-62-06ZZZ-720Z-A
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-28-31-61-01ZZZ-720Z-A
A350-A-28-31-61-02ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-720Z-A
Procedure
(a) Install the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-12-
63-07ZZZ-720Z-A.
(b) Install the pipes of the refuel gallery between Rib 12 and Rib 15, refer to Ref. MP
A350-A-28-25-61-03ZZZ-720Z-A.
(c) Install the pipes of the AFT inert gas generation system between Rib 12 and Rib
22, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(d) Install the pipes of the FWD inert gas generation system between Rib 14 and Rib
16, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(e) Install the vent pipes between Rib 14 and Rib 16, refer to Ref. MP A350-A-28-12-
62-04ZZZ-720Z-A.
(f) Install the pipes of the refuel gallery between Rib 15 and Rib 16, refer to Ref. MP
A350-A-28-25-61-05ZZZ-720Z-A.
(g) Install the fuel jettison pipe between Rib 15 and Rib 16, refer to Ref. MP A350-A-
28-31-61-01ZZZ-720Z-A.

### Page 40

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 40
(h) Install the fuel jettison pipes between Rib 16 and Rib 22, refer to Ref. MP A350-A-
28-31-61-02ZZZ-720Z-A.
(i) Install the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
62-05ZZZ-720Z-A.
(j) Install the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-720Z-A.
(k) Install the pipes of the FWD inert gas generation system between Rib 18 and Rib
20, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(l) Install the vent pipe between Rib 19 and Rib 20, refer to Ref. MP A350-A-28-12-
62-06ZZZ-720Z-A.
(m) Install the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-12-
63-06ZZZ-720Z-A.
(n) Install the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-720Z-A.
CONF 001
(2) Task A350-A-57-XX-P074-02001-720A-A (A350-A-57-XX-P074-02ZZZ-720Z-A)
Install the Pipes in the RH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 12.00 h
Minimum Number of person 4
Elapsed Time 3.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-720Z-A
Procedure
(a) Install the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-12-
63-07ZZZ-720Z-A.
(b) Install the pipes of the refuel gallery between Rib 12 and Rib 15, refer to Ref. MP
A350-A-28-25-61-03ZZZ-720Z-A.
(c) Install the pipes of the AFT inert gas generation system between Rib 12 and Rib
22, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.

### Page 41

A350
SERVICE BULLETIN
REV 00 Jun 24/22 A350-57-P074
Page 41
(d) Install the pipes of the FWD inert gas generation system between Rib 14 and Rib
16, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(e) Install the pipes of the refuel gallery between Rib 15 and Rib 16, refer to Ref. MP
A350-A-28-25-61-05ZZZ-720Z-A.
(f) Install the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-720Z-A.
(g) Install the pipes of the FWD inert gas generation system between Rib 18 and Rib
20, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(h) Install the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-12-
63-06ZZZ-720Z-A.
(i) Install the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-720Z-A.
CONF 002
(2) Task A350-A-57-XX-P074-02002-720A-A (A350-A-57-XX-P074-02ZZZ-720Z-A)
Install the Pipes in the RH Wing Between Ribs 12 and 22
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600 Work location From Rib 12 to Rib 22
Manpower/Resources/Skills
Man-hours 15.00 h
Minimum Number of person 4
Elapsed Time 3.75 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-28-31-61-01ZZZ-720Z-A
A350-A-28-31-61-02ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-720Z-A
Procedure
(a) Install the vent pipes between Rib 12 and Rib 18, refer to Ref. MP A350-A-28-12-
63-07ZZZ-720Z-A.
(b) Install the pipes of the refuel gallery between Rib 12 and Rib 15, refer to Ref. MP
A350-A-28-25-61-03ZZZ-720Z-A.
(c) Install the pipes of the AFT inert gas generation system between Rib 12 and Rib
22, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(d) Install the pipes of the FWD inert gas generation system between Rib 14 and Rib
16, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.

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Page 42
(e) Install the pipes of the refuel gallery between Rib 15 and Rib 16, refer to Ref. MP
A350-A-28-25-61-05ZZZ-720Z-A.
(f) Install the fuel jettison pipe between Rib 15 and Rib 16, refer to Ref. MP A350-A-
28-31-61-01ZZZ-720Z-A.
(g) Install the fuel jettison pipes between Rib 16 and Rib 22, refer to Ref. MP A350-A-
28-31-61-02ZZZ-720Z-A.
(h) Install the vent pipe between Rib 18 and Rib 19, refer to Ref. MP A350-A-28-12-
63-01ZZZ-720Z-A.
(i) Install the pipes of the FWD inert gas generation system between Rib 18 and Rib
20, refer to Ref. MP A350-A-47-20-62-00ZZZ-720Z-A.
(j) Install the vent pipes between Rib 19 and Rib 21, refer to Ref. MP A350-A-28-12-
63-06ZZZ-720Z-A.
(k) Install the vent pipe between Rib 21 and Rib 22, refer to Ref. MP A350-A-28-12-
63-00ZZZ-720Z-A.
CONF ALL
E. TEST
CONF 001
(1) Task A350-A-57-XX-P074-01001-300A-A (A350-A-57-XX-P074-01ZZZ-300Z-A)
Test
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 0.25 h
Minimum Number of person 1
Elapsed Time 0.25 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-62-04ZZZ-720Z-A
A350-A-28-12-62-05ZZZ-720Z-A
A350-A-28-12-62-06ZZZ-720Z-A
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-12-82-00ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-720Z-A
A350-A-57-27-71-00ZZZ-720Z-A
Procedure
This Service Bulletin requires the accomplishment of T ests given in other topics which
are referenced in the table below:
Subtask Maintenance Procedure
Ref. T ask A350-A-57-XX-P074-01ZZZ-740Z-A Ref. MP A350-A-57-27-71-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-740Z-A Ref. MP A350-A-57-27-71-00ZZZ-720Z-A

### Page 43

A350
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Page 43
Ref. T ask A350-A-57-XX-P074-01ZZZ-740Z-A Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-740Z-A Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-62-04ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-62-05ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-62-06ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
CONF 002
(1) Task A350-A-57-XX-P074-01002-300A-A (A350-A-57-XX-P074-01ZZZ-300Z-A)
Test
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 0.25 h
Minimum Number of person 1
Elapsed Time 0.25 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-62-04ZZZ-720Z-A
A350-A-28-12-62-05ZZZ-720Z-A
A350-A-28-12-62-06ZZZ-720Z-A
A350-A-28-12-63-00ZZZ-720Z-A
A350-A-28-12-63-01ZZZ-720Z-A
A350-A-28-12-63-06ZZZ-720Z-A
A350-A-28-12-63-07ZZZ-720Z-A
A350-A-28-12-82-00ZZZ-720Z-A
A350-A-28-25-61-03ZZZ-720Z-A
A350-A-28-25-61-05ZZZ-720Z-A
A350-A-28-31-61-01ZZZ-720Z-A
A350-A-28-31-61-02ZZZ-720Z-A
A350-A-47-20-62-00ZZZ-720Z-A
A350-A-57-27-71-00ZZZ-720Z-A
Procedure
This Service Bulletin requires the accomplishment of T ests given in other topics which
are referenced in the table below:

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A350
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Page 44
Subtask Maintenance Procedure
Ref. T ask A350-A-57-XX-P074-01ZZZ-740Z-A Ref. MP A350-A-57-27-71-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-740Z-A Ref. MP A350-A-57-27-71-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-740Z-A Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-740Z-A Ref. MP A350-A-28-12-82-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-07ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-25-61-03ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-47-20-62-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-62-04ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-62-05ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-25-61-05ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-31-61-01ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-31-61-01ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-31-61-02ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-31-61-02ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-01ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-62-06ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-06ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-01ZZZ-720Z-A Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
Ref. T ask A350-A-57-XX-P074-02ZZZ-720Z-A Ref. MP A350-A-28-12-63-00ZZZ-720Z-A
CONF ALL
F. CLOSE-UP
(1) Task A350-A-57-XX-P074-01001-740A-A (A350-A-57-XX-P074-01ZZZ-740Z-A)
Close the LH Wing Access Covers and Access Doors
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
500
Manpower/Resources/Skills
Man-hours 11.50 h
Minimum Number of person 2
Elapsed Time 5.75 h
Skills Airframe

### Page 45

A350
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REV 00 Jun 24/22 A350-57-P074
Page 45
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-82-00ZZZ-720Z-A
A350-A-57-27-71-00ZZZ-720Z-A
A350-A-57-27-71-01ZZZ-720Z-A
Procedure
(a) Install the tank internal doors Door 541BZ, Door 541CZ, and Door 542AZ, refer
to Ref. MP A350-A-57-27-71-01ZZZ-720Z-A.
(b) Install the fuel tank access covers Panel 541AB, Panel 541BB, Panel 541CB, Panel
541DB, Panel 541EB, Panel 542AB, Panel 542BB, Panel 542DB, Panel 542EB,
Panel 542FB, Panel 542GB, Panel 542HB, Panel 542JB, Panel 542KB, Panel 542LB,
Panel 542MB, Panel 542NB, and Panel 543EB, refer to Ref. MP A350-A-57-27-71-
00ZZZ-720Z-A.
(c) Install the NACA-Duct panel assembly between Rib 26 and Rib 27, refer to Ref.
MP A350-A-28-12-82-00ZZZ-720Z-A.
(d) Do the Close-up procedure as specified in the Installation of the Fuel T ank Access
- Covers, refer to Ref. MP A350-A-57-27-71-00ZZZ-720Z-A.
(e) Do the Close-up procedure as specified in the Installation the NACA-Duct Panel
Assembly - Surge T ank, refer to Ref. MP A350-A-28-12-82-00ZZZ-720Z-A.
(2) Task A350-A-57-XX-P074-02001-740A-A (A350-A-57-XX-P074-02ZZZ-740Z-A)
Close the RH Wing Access Covers and Access Doors
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
600
Manpower/Resources/Skills
Man-hours 11.50 h
Minimum Number of person 2
Elapsed Time 5.75 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP
A350-A-28-12-82-00ZZZ-720Z-A
A350-A-57-27-71-00ZZZ-720Z-A
A350-A-57-27-71-01ZZZ-720Z-A
Procedure
(a) Install the tank internal doors Door 641BZ, Door 641CZ, and Door 642AZ, refer
to Ref. MP A350-A-57-27-71-01ZZZ-720Z-A.
(b) Install the fuel tank access covers Panel 641AB, Panel 641BB, Panel 641CB, Panel
641DB, Panel 641EB, Panel 642AB, Panel 642BB, Panel 642DB, Panel 642EB,
Panel 642FB, Panel 642GB, Panel 642HB, Panel 542JB, Panel 642KB, Panel 642LB,
Panel 642MB, Panel 642NB, and Panel 643EB, refer to Ref. MP A350-A-57-27-71-
00ZZZ-720Z-A.

### Page 46

A350
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REV 00 Jun 24/22 A350-57-P074
Page 46
(c) Install the NACA-Duct panel assembly between Rib 26 and Rib 27, refer to Ref.
MP A350-A-28-12-82-00ZZZ-720Z-A.
(d) Do the Close-up procedure as specified in the Installation of the Fuel T ank Access
- Covers, refer to Ref. MP A350-A-57-27-71-00ZZZ-720Z-A.
(e) Do the Close-up procedure as specified in the Installation the NACA-Duct Panel
Assembly - Surge T ank, refer to Ref. MP A350-A-28-12-82-00ZZZ-720Z-A.
(3) Task A350-A-57-XX-P074-03001-740A-A (A350-A-57-XX-P074-03ZZZ-740Z-A)
Close-up
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 0.25 h
Minimum Number of person 1
Elapsed Time 0.25 h
Skills Airframe
Procedure
(a) Make sure that the work areas are clean and clear of tools and other items of
equipment.
(b) Put the aircraft back to its initial configuration.
G. ADMINISTRATIVE
(1) Task A350-A-57-XX-P074-01001-90AA-A (A350-A-57-XX-P074-01ZZZ-90AZ-A)
Administrative
Procedure
Confirm in the applicable aircraft records that you have completed all the work defined
in this Service Bulletin task set as required.

### Page 47

A350
SERVICE BULLETIN
APPENDIX
REV 00 Jun 24/22 A350-57-P074
Page 47
APPENDIX
A. Manpower Gantt Chart
CONF 001
Manpower Gantt Chart
For an explanation of the man-hours and elapsed time, refer to the next page.
CONF 002
Manpower Gantt Chart
For an explanation of the man-hours and elapsed time, refer to the next page.

### Page 48

A350
SERVICE BULLETIN
APPENDIX
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTW-A-001-01 Fig.AA Sol.AA SHEET 1/1
REV 00 Jun 24/22 A350-57-P074Gantt Chart
Page 48
CONF 001
ELAPSED TIME ASSUMPTION SERVICE BULLETIN No A350-57-P074
SB ELAPSED TIME
(HOURS)
JOB SET-UP
MH ET/S
TOTAL MANHOURS
SB ELAPSED TIME
90.75
17.75
STEPS
0.25 0.25
100
OPEN THE LH WING ACCESS COVERS 11.50 5.75
REMOVE THE PIPES IN THE LH WING 8.00 2.00
OPEN THE RH WING ACCESS COVERS 11.50 5.75
REMOVE THE PIPES IN THE RH WING 8.00 2.00
CLOSE THE LH WING ACCESS 11.50 5.75
CLOSE THE RH WING ACCESS 11.50 5.75
MH
ET/S:
PER
MANHOURS
ELAPSED TIME PER STEP
NUMBER OF PERSONS
01
02
THIS CHART IS ONLY A PROPOSAL.
OPERATORS MAY DETERMINE THAT ANOTHER WAY
TO DO THE WORK IS MORE SUITABLE FOR THEM.
01
02
NOTE:
PER
1
2
4
2
4
2
2
INSTALL THE PIPES IN THE LH WING 12.00 3.004
:
:
IF A VSB IS INVOLVED, THE ASSOCIATED MANHOURS
ARE NOT REFLECTED IN THIS GANTT CHART.
APPLY SEALANT TO THE UPPER RIB 0.504
APPLY SEALANT TO THE UPPER RIB 0.504
INSTALL THE PIPES IN THE RH WING 12.00 4
CLOSE-UP 0.25 0.251
AND ACCESS DOORS
BETWEEN RIBS 12 AND 22
AND ACCESS DOORS
BETWEEN RIBS 12 AND 22
FEET IN THE LH WING
FEET IN THE RH WING
BETWEEN RIBS 12 AND 22
COVERS AND ACCESS DOORS
BETWEEN RIBS 12 AND 22
COVERS AND ACCESS DOORS
321
TEST 0.25 0.251
2.00
2.00
3.00
4 5 6 7 8 9 11 12 13 14 15 16 17 18
ICN-A350-A-57XXP074-A-FAPE3-06GTW-A-001-01

### Page 49

A350
SERVICE BULLETIN
APPENDIX
Figure ICN-A350-A-57XXP074-A-FAPE3-06GTY-A-001-01 Fig.AA Sol.AB SHEET 1/1
REV 00 Jun 24/22 A350-57-P074Gantt Chart
Page 49
CONF 002
ELAPSED TIME ASSUMPTION SERVICE BULLETIN No A350-57-P074
SB ELAPSED TIME
(HOURS)
JOB SET-UP
MH ET/S
TOTAL MANHOURS
SB ELAPSED TIME
102.75
19.50
STEPS
0.25 0.25
100
OPEN THE LH WING ACCESS COVERS 11.50 5.75
REMOVE THE PIPES IN THE LH WING 11.00 2.75
OPEN THE RH WING ACCESS COVERS 11.50 5.75
REMOVE THE PIPES IN THE RH WING 10.00 2.50
CLOSE THE LH WING ACCESS 11.50 5.75
CLOSE THE RH WING ACCESS 11.50 5.75
MH
ET/S:
PER
MANHOURS
ELAPSED TIME PER STEP
NUMBER OF PERSONS
01
02
THIS CHART IS ONLY A PROPOSAL.
OPERATORS MAY DETERMINE THAT ANOTHER WAY
TO DO THE WORK IS MORE SUITABLE FOR THEM.
01
02
NOTE:
PER
1
2
4
2
4
2
2
INSTALL THE PIPES IN THE LH WING 16.00 4.004
:
:
IF A VSB IS INVOLVED, THE ASSOCIATED MANHOURS
ARE NOT REFLECTED IN THIS GANTT CHART.
APPLY SEALANT TO THE UPPER RIB 0.504
APPLY SEALANT TO THE UPPER RIB 0.504
INSTALL THE PIPES IN THE RH WING 15.00 4
CLOSE-UP 0.25 0.251
AND ACCESS DOORS
BETWEEN RIBS 12 AND 22
AND ACCESS DOORS
BETWEEN RIBS 12 AND 22
FEET IN THE LH WING
FEET IN THE RH WING
BETWEEN RIBS 12 AND 22
COVERS AND ACCESS DOORS
BETWEEN RIBS 12 AND 22
COVERS AND ACCESS DOORS
321
TEST 0.25 0.251
2.00
2.00
3.75
4 5 6 7 8 9 11 12 13 14 15 16 17 18 19 20
ICN-A350-A-57XXP074-A-FAPE3-06GTY-A-001-01

### Page 50

A350
SERVICE BULLETIN
APPENDIX
REV 00 Jun 24/22 A350-57-P074
Page 50
CONF ALL
B. REPORTING SHEET
TITLE: WINGS - INTRODUCE OVERLAP SEALANT OPTIMISATION IN WINGBOX -
1000 WUC
MODIFICATION No.: 116646L01172
(1) SB Reporting status
This Service Bulletin will only be incorporated into affected customized Maintenance
and Flight Operations Products if it is duly reported to Airbus.
(2) GENERAL information
The SB Reporting policy is published in ISI 00.00.00135. This document provides
information regarding: the SB Reporting means and benefits, the update of
customized Maintenance Products and customized Flight Operations Products.
If this Service Bulletin has an operational impact, refer to paragraph "Flight Operations
Products" for further information on the update of affected Flight Operations Products.
(3) SB Reporting procedure
Standard practice to report SB is to use the online reporting application on
AirbusWorld.
Refer to ISI 00.00.00179:
- For complete information on reporting means to Airbus, Question 2 "What are
the standard practices for SB Reporting?"
- If this SB requires previous or simultaneous accomplishment of other SBs,
Question 3 "What about the reporting of prerequisite Service Bulletins?"
NOTE: ISI 00.00.00179 covers all the frequently asked questions about SB Reporting.
It is revised on a regular basis.

### Page 51

A350
SERVICE BULLETIN
APPENDIX
REV 00 Jun 24/22 A350-57-P074
Page 51
C. QUALITY PERCEPTION FORM
Use this form to tell us what is your perception of the quality of this Service Bulletin.
The reported data that you provide us will be used to analyse areas of difficulties and to
take corrective action to further improve the quality of our Service Bulletin.
We thank you for the time you have taken in completing this form.
Quality rating of this SB 4 3 2 1
Quality rating of the Accomplishment Instructions 4 3 2 1
Quality rating of the Illustrations 4 3 2 1
Is this SB easy to understand ? Y / N
NOTE: Please rate on a scale of 1 to 4, with 4 being the highest score
If you have difficulties in the accomplishment of this SB please quote below the area(s) and
give a short description of the issue.
Planning Material Instructions
X Applicability X T ooling X Preparation
X Reason X List of Materials
Operator Supplied
X Mod/Inspection
X Manpower X Kit content X T est
X References X Re-identification X Close-up
X Publication X Illustrations
X Industry Support
Comments :
Operator : Date :
Name/Title
Please return this form to :
AIRBUS
2, ROND POINT EMILE DEWOITINE
31700 BLAGNAC
FRANCE
Or via your Resident Customer Support Office.

---
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