# Airbus Service Bulletin A350-57-P077

Copy: No revision named ("SB A350-57-P077"), 90 pages: PDF https://openairdocs.org/files/sha256/ca/3a/ca3adcb6c389a6fd70a6f39b7c5e1f9449b46f4aa0f2f8cde149841edf9c9e46; text https://openairdocs.org/service-documents/airbus/a350-57-p077/file/ca3adcb6c389.md. Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2023-1883, the docket of AD 2024-08-01. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Airbus](https://openairdocs.org/service-documents/airbus.md)
- Type: Service bulletin (Service Bulletin)
- Number: A350-57-P077
- Page: https://openairdocs.org/service-documents/airbus/a350-57-p077

## ADs that cite it (1) (OpenAirDocs)

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

- [AD 2024-08-01](https://openairdocs.org/ad/2024-08-01.md), effective Jun 6, 2024: No revision named

## Text (90 pages)

Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2023-1883, the docket of AD 2024-08-01. 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 Jan 31/23 A350-57-P077
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 - TRAILING EDGE AND TRAILING EDGE DEVICES - INSPECTION
OF INBOARD FLAP TRUNNION
MODIFICATION No.:
None

### Page 2

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jan 31/23 A350-57-P077
Page 2
ATA SYSTEM: 57
TITLE: WINGS - TRAILING EDGE AND TRAILING EDGE DEVICES - INSPECTION
OF INBOARD FLAP TRUNNION
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 None
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.
CONF 002
MODIFICATION CLASSIFICATION
MAJOR None
MINOR None
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.
CONF 003
MODIFICATION CLASSIFICATION
MAJOR None
MINOR None
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.
CONF ALL
B. REASON
(1) History
Cracks have been detected on the A350-900 INBD flap trunnion made from aluminum
alloy 7037 due to an abnormal behavior of this material. The INBD flap trunnion is a
single forged part that combines the outer trunnion tube, trunnion arm, and the load
introduction rib inside the flap.
(2) Objective/Action
This ISB provides the instructions to perform a repetitive SDI of the trunnion to
detect any crack initiation on pre-mod 107224L00548 aircraft (MOD 107224: WINGS
- INBOARD FLAP - INTRODUCE TRUNNION MATERIAL CHANGE FROM AL7037 TO
AL7010).

### Page 3

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jan 31/23 A350-57-P077
Page 3
(3) Advantages
The accomplishment of this ISB contributes to ensure early finding detection and
maintaining the structural integrity of the INBD flap trunnion.
(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
FLAPS/SLATS EXTENDED YES
CONF 002
MAINTENANCE CONFIGURATION
FLAPS/SLATS EXTENDED YES
CONF 003
MAINTENANCE CONFIGURATION
FLAPS/SLATS EXTENDED YES
CONF ALL
E. MATERIAL PRICE INFORMATION
CONF 001
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
No material
CONF 002
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY

### Page 4

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jan 31/23 A350-57-P077
Page 4
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET QTYPER A/C PRICE PER A/C MAIN PARTS
Components See SB See Note Washer
NOTE: Price information to be obtained from the given supplier.
CONF 003
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET QTYPER A/C PRICE PER A/C MAIN PARTS
Components See SB See Note Washer
NOTE: Price information to be obtained from the given supplier.
CONF ALL
F. APPLICABILITY
This Service Bulletin is applicable to this (these) operator(s):
36V CPA DAL ETH FBU FIN HVN QTR SIA THA
G. CONCURRENT REQUIREMENTS
None
H. NATURE OF THE WORK
CONF 001
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
AIRCRAFT YES
EQUIPMENT NO
CONF 002
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
AIRCRAFT YES
EQUIPMENT NO
CONF 003
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY

### Page 5

A350
SERVICE BULLETIN
SUMMARY
REV 00 Jan 31/23 A350-57-P077
Page 5
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
AIRCRAFT YES
EQUIPMENT NO
CONF ALL
I. MANPOWER
CONF 001
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
MANPOWER
TOTAL MAN-HOURS 8.25 h
ELAPSED TIME (HOURS) 4.25 h
CONF 002
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
MANPOWER
TOTAL MAN-HOURS 16.75 h
ELAPSED TIME (HOURS) 7.00 h
CONF 003
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
MANPOWER
TOTAL MAN-HOURS 11.25 h
ELAPSED TIME (HOURS) 7.00 h

### Page 6

A350
SERVICE BULLETIN
SUMMARY
Figure ICN-A350-A-57XXP077-A-FAPE3-06QNC-A-001-01 Fig.SA Sol.AC SHEET 1/1
REV 00 Jan 31/23 A350-57-P077General Overview
Page 6
CONF ALL
J. GENERAL OVERVIEW
CONF 002
A
Z561
FR35
FR74
Z197
AZ661
Z198
NOTE:
INSPECTION ON THE INBD FLAP TRUNNION ARM.
LH SHOWN
RH SYMMETRICAL
A
ICN-A350-A-57XXP077-A-FAPE3-06QNC-A-001-01

### Page 7

A350
SERVICE BULLETIN
SUMMARY
Figure ICN-A350-A-57XXP077-A-FAPE3-06P42-A-001-01 Fig.SA Sol.AA SHEET 1/1
REV 00 Jan 31/23 A350-57-P077General Overview
Page 7
CONF 001
A
Z561
FR35
FR74
Z197
AZ661
Z198
NOTE:
INSPECTION ON THE INBD FLAP TRUNNION ARM.
LH SHOWN
RH SYMMETRICAL
A
ICN-A350-A-57XXP077-A-FAPE3-06P42-A-001-01

### Page 8

A350
SERVICE BULLETIN
SUMMARY
Figure ICN-A350-A-57XXP077-A-FAPE3-06P41-A-002-01 Fig.SA Sol.AB SHEET 1/1
REV 00 Jan 31/23 A350-57-P077General Overview
Page 8
CONF 003
Z561
FR35
FR74
Z197
A
NOTE:
INSPECTION ON THE INBD FLAP TRUNNION ARM.
A
ICN-A350-A-57XXP077-A-FAPE3-06P41-A-002-01

### Page 9

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 9
ATA SYSTEM: 57
TITLE: WINGS - TRAILING EDGE AND TRAILING EDGE DEVICES - INSPECTION
OF INBOARD FLAP TRUNNION
CONF ALL
1. PLANNING INFORMATION
A. APPLICABILITY
NOTE: This Service Bulletin is only applicable to aircraft on which MOD No. 107224L00548
(WINGS - INBOARD FLAP - INTRODUCE TRUNNION MATERIAL CHANGE FROM AL7037
TO AL7010) is not embodied except MSN 0021.
(1) Models
ON A/C 0005-0024, 0026-0032, 0034-0046
350-941
CONF ALL
(2) Applicability by MSN
0005-0024 0026-0032 0034-0046
(3) MSN by configuration
CONF 001
MSN CONFIGURATION
0005 0006 0007 0008 0009 0010 0011 0012 0013 0014 0015
0016 0017 0018 0019 0020
001
CONF 002
MSN CONFIGURATION
0022 0023 0024 0026 0027 0028 0029 0030 0031 0032 0034
0035 0036 0037 0038 0039 0040 0041 0042 0043 0044 0045
0046
002
CONF 003
MSN CONFIGURATION
0021 003
CONF ALL
(4) Configuration definition
CONF 001
Configuration 001
CONF 001 is applicable to the aircraft on which MOD No. 102046L00129 and
MOD No. 107224L00548 are not embodied.
CONF 002
Configuration 002
CONF 002 is applicable to the aircraft on which MOD No. 102046L00129 is
embodied and MOD No. 107224L00548 is not embodied.
CONF 003

### Page 10

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 10
Configuration 003
CONF 003 is applicable to the aircraft on which MOD No. 102046L00129 is
embodied and MOD No. 107224L00548 is partially embodied.
CONF ALL
B. CONCURRENT REQUIREMENTS
None
C. REASON
(1) History
Cracks have been detected on the A350-900 INBD flap trunnion made from aluminum
alloy 7037 due to an abnormal behavior of this material. The INBD flap trunnion is a
single forged part that combines the outer trunnion tube, trunnion arm, and the load
introduction rib inside the flap.
(2) Objective/Action
This ISB provides the instructions to perform a repetitive SDI of the trunnion to
detect any crack initiation on pre-mod 107224L00548 aircraft (MOD 107224: WINGS
- INBOARD FLAP - INTRODUCE TRUNNION MATERIAL CHANGE FROM AL7037 TO
AL7010).
(3) Advantages
The accomplishment of this ISB contributes to ensure early finding detection and
maintaining the structural integrity of the INBD flap trunnion.
(4) Operational/Maintenance Consequences
None
D. DESCRIPTION
T o accomplish this Service Bulletin it is necessary to:
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
CONF 002 003
1 Remove the Trunnion Bolt from the INBD Flap ASSY, LH Side
CONF 002
2 Remove the Trunnion Bolt from the INBD Flap ASSY, RH Side
CONF 001
3 Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH Side
CONF 002 003
3 Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH Side
CONF 001
4 Do an SDI of the Trunnion Arm at the INBD Flap ASSY, RH Side
CONF 002
4 Do an SDI of the Trunnion Arm at the INBD Flap ASSY, RH Side
5 Install the Trunnion Bolt on the INBD Flap ASSY, LH Side
CONF 003
5 Install the Trunnion Bolt on the INBD Flap ASSY, LH Side
CONF 002

### Page 11

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 11
6 Install the Trunnion Bolt on the INBD Flap ASSY, RH Side
CONF 001
7 Complete and Send the Inspection Report Sheet
CONF 002 003
7 Complete and Send the Inspection Report Sheet
CONF ALL
E. COMPLIANCE
CONF 001
(1) Classification
MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale
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 thresholds and intervals given but reference should be made to the AD for
confirmation of the mandated accomplishment timescale.
Accomplishment of this Service Bulletin must be done in accordance with the table
below.
T able 1, CONF 001 - SDI of the Trunnion Arm at the INBD Flap Location, LH and RH
sides
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL
All aircraft Do an SDI of the
trunnion arm at
the INBD flap
in accordance
with Ref. T ask
set A350-A-
57-XX-P077-
01ZZZ-93BZ-A
Before 9 years
from aircraft EIS
None None
If crack is found Contact AIRBUS
and follow their
instructions
Before next flight None None
If crack is
not found
Repeat the
inspection in
accordance
with Ref. T ask
set A350-A-
57-XX-P077-
01ZZZ-93BZ-A
None None 3 years
CONF 002
(1) Classification
MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale
This Service Bulletin has been classified Mandatory. It is expected that an
Airworthiness Directive (AD) published by the European Union Aviation Safety Agency

### Page 12

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 12
(EASA) will be issued to confirm this classification. It is anticipated that the AD will
confirm the thresholds and intervals given but reference should be made to the AD for
confirmation of the mandated accomplishment timescale.
Accomplishment of this Service Bulletin must be done in accordance with the table
below.
T able 2, CONF 002 - SDI of the Trunnion Arm at the INBD Flap Location, LH and RH
sides
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL
All aircraft Do an SDI of the
trunnion arm at
the INBD flap
in accordance
with Ref. T ask
set A350-A-
57-XX-P077-
01ZZZ-93BZ-A
Before 9 years
from aircraft EIS
None None
If crack is found Contact AIRBUS
and follow their
instructions
Before next flight None None
If crack is
not found
Repeat the
inspection in
accordance
with Ref. T ask
set A350-A-
57-XX-P077-
01ZZZ-93BZ-A
None None 3 years
CONF 003
(1) Classification
MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale
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 thresholds and intervals given but reference should be made to the AD for
confirmation of the mandated accomplishment timescale.
Accomplishment of this Service Bulletin must be done in accordance with the table
below.
T able 3, CONF 003 - SDI of the Trunnion Arm at the INBD Flap Location, LH side
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL
All aircraft Do an SDI of the
trunnion arm at
the INBD flap
in accordance
with Ref. T ask
set A350-A-
Before 9 years
from aircraft EIS
None None

### Page 13

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 13
COMPLIANCE TIME
CONDITIONS ACTION
THRESHOLD GRACE PERIOD
REPETITIVE
INTERVAL
57-XX-P077-
01ZZZ-93BZ-A
If crack is found Contact AIRBUS
and follow their
instructions
Before next flight None None
If crack is
not found
Repeat the
inspection in
accordance
with Ref. T ask
set A350-A-
57-XX-P077-
01ZZZ-93BZ-A
None None 3 years
CONF ALL
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.
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
PREPARATION
Job Set-up 2.50 h
PROCEDURE
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH
Side
1.50 h
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, RH
Side
1.50 h
Complete and Send the Inspection Report Sheet 0.25 h
PREPARATION FOR TEST
None
TEST
None
CLOSE-UP

### Page 14

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 14
Close-up 2.50 h
TOTAL MAN-HOURS 8.25 h
ELAPSED TIME (HOURS) 4.25 h
NOTE: For an explanation of the man-hours and elapsed time, refer to the
Gantt Chart given in Appendix B.
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) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
PREPARATION
Job Set-up 2.50 h
PROCEDURE
Remove the Trunnion Bolt from the INBD Flap ASSY, LH
Side
1.50 h
Remove the Trunnion Bolt from the INBD Flap ASSY, RH
Side
1.50 h
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH
Side
2.00 h
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, RH
Side
2.00 h
Install the Trunnion Bolt on the INBD Flap ASSY, LH Side 2.00 h
Install the Trunnion Bolt on the INBD Flap ASSY, RH Side 2.00 h
Complete and Send the Inspection Report Sheet 0.25 h
PREPARATION FOR TEST
None
TEST
T est 0.50 h
CLOSE-UP
Close-up 2.50 h
TOTAL MAN-HOURS 16.75 h
ELAPSED TIME (HOURS) 7.00 h
NOTE: For an explanation of the man-hours and elapsed time, refer to the
Gantt Chart given in Appendix B.
CONF 003
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

### Page 15

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 15
and tools, drying times for paints, sealants, etc., and general administration work are also
not included.
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
PREPARATION
Job Set-up 2.50 h
PROCEDURE
Remove the Trunnion Bolt from the INBD Flap ASSY, LH
Side
1.50 h
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH
Side
2.00 h
Install the Trunnion Bolt on the INBD Flap ASSY, LH Side 2.00 h
Complete and Send the Inspection Report Sheet 0.25 h
PREPARATION FOR TEST
None
TEST
T est 0.50 h
CLOSE-UP
Close-up 2.50 h
TOTAL MAN-HOURS 11.25 h
ELAPSED TIME (HOURS) 7.00 h
NOTE: For an explanation of the man-hours and elapsed time, refer to the
Gantt Chart given in Appendix B.
CONF ALL
H. WEIGHT AND BALANCE
Not changed
I. ELECTRICAL LOAD DATA
Not changed
J. REFERENCES
CONF 001
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
ELECTRICAL STANDARD PRACTICES (ESP)
A350-A-20-55-XX-01ZZZ-042Z-A
INTRODUCTION (INTRO)
A350-A-00-61-04-11ZZZ-018Z-D
IN SERVICE INFORMATION (ISI)
00.00.00179

### Page 16

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 16
MAINTENANCE PROCEDURE (MP)
A350-A-24-41-XX-00ZZZ-170Z-A A350-A-27-5X-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-53-35-76-1CZZZ-520Z-A
A350-A-53-35-76-1CZZZ-720Z-A
A350-A-53-35-83-01ZZZ-520Z-A
A350-A-53-35-83-01ZZZ-720Z-A
NON DESTRUCTIVE TEST (NDT)
A350-A-57-54-63-00ZZZ-355Z-A
SYSTEM DESCRIPTION (SD)
A350-A-06-3X-XX-01ZZZ-04CZ-A A350-A-06-4X-XX-01ZZZ-04CZ-A
CONF 002
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
AIRCRAFT STRUCTURAL REPAIR (ASR)
A350-A-51-24-XX-01ZZZ-667Z-A A350-A-51-42-XX-01ZZZ-667Z-A
A350-A-51-75-12-00ZZZ-660Z-A
CONSUMABLE MATERIAL LIST (CML)
Full content
ELECTRICAL STANDARD PRACTICES (ESP)
A350-A-20-55-XX-01ZZZ-042Z-A
INTRODUCTION (INTRO)
A350-A-00-61-04-11ZZZ-018Z-D
IN SERVICE INFORMATION (ISI)
00.00.00179
MAINTENANCE PROCEDURE (MP)
A350-A-20-51-50-01ZZZ-25BZ-A A350-A-24-41-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-01ZZZ-170Z-A
A350-A-27-5X-XX-06ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-27-51-XX-07ZZZ-345Z-A
A350-A-27-54-62-00ZZZ-720Z-A A350-A-53-35-76-1CZZZ-520Z-A
A350-A-53-35-76-1CZZZ-720Z-A
A350-A-53-35-83-01ZZZ-520Z-A
A350-A-53-35-83-01ZZZ-720Z-A
A350-A-57-54-62-00ZZZ-520Z-A
A350-A-57-54-62-00ZZZ-720Z-A
NON DESTRUCTIVE TEST (NDT)
A350-A-57-54-63-00ZZZ-353Z-A

### Page 17

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 17
SYSTEM DESCRIPTION (SD)
A350-A-06-2X-XX-01ZZZ-04CZ-A A350-A-06-3X-XX-01ZZZ-04CZ-A
A350-A-06-4X-XX-01ZZZ-04CZ-A
STANDARDS MANUAL (SM)
Full content
CONF 003
(1) Inspection of the Trunnion Arm at the INBD Flap ASSY
(a) T ask set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion Arm at the
INBD Flap ASSY
AIRCRAFT STRUCTURAL REPAIR (ASR)
A350-A-51-24-XX-01ZZZ-667Z-A A350-A-51-42-XX-01ZZZ-667Z-A
A350-A-51-75-12-00ZZZ-660Z-A
CONSUMABLE MATERIAL LIST (CML)
Full content
ELECTRICAL STANDARD PRACTICES (ESP)
A350-A-20-55-XX-01ZZZ-042Z-A
INTRODUCTION (INTRO)
A350-A-00-61-04-11ZZZ-018Z-D
IN SERVICE INFORMATION (ISI)
00.00.00179
MAINTENANCE PROCEDURE (MP)
A350-A-20-51-50-01ZZZ-25BZ-A A350-A-24-41-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-01ZZZ-170Z-A
A350-A-27-5X-XX-06ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-27-51-XX-07ZZZ-345Z-A
A350-A-27-54-62-00ZZZ-720Z-A A350-A-53-35-76-1CZZZ-520Z-A
A350-A-53-35-76-1CZZZ-720Z-A
A350-A-53-35-83-01ZZZ-520Z-A
A350-A-53-35-83-01ZZZ-720Z-A
A350-A-57-54-62-00ZZZ-520Z-A
A350-A-57-54-62-00ZZZ-720Z-A
NON DESTRUCTIVE TEST (NDT)
A350-A-57-54-63-00ZZZ-353Z-A
SYSTEM DESCRIPTION (SD)
A350-A-06-2X-XX-01ZZZ-04CZ-A A350-A-06-3X-XX-01ZZZ-04CZ-A
A350-A-06-4X-XX-01ZZZ-04CZ-A

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A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 18
STANDARDS MANUAL (SM)
Full content
CONF ALL
K. PUBLICATION AFFECTED
None
L. INDUSTRY SUPPORT INFORMATION
This Service Bulletin is the subject of an AIRBUS monitored retrofit campaign.
For the organization of this retrofit, you are kindly requested to contact AIRBUS retrofit
management department: monitored.retrofit@airbus.com.
AIRBUS will not provide industry support for accomplishment of this Service Bulletin.

### Page 19

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 19
2. MATERIAL INFORMATION
A. MATERIAL APPLICABILITY
CONF 001
Material for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion
Arm at the INBD Flap ASSY
MATERIAL QTY SEE NOTES
Referenced tools See SB
Referenced consumables See SB
CONF 002
Material for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion
Arm at the INBD Flap ASSY
MATERIAL QTY SEE NOTES
Referenced tools See SB
Consumables See SB
Referenced consumables See SB
Components See SB
Referenced parts See SB
CONF 003
Material for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the Trunnion
Arm at the INBD Flap ASSY
MATERIAL QTY SEE NOTES
Referenced tools See SB
Consumables See SB
Referenced consumables See SB
Components See SB
Referenced parts See SB
CONF ALL
B. TOOLING
CONF 001
Referenced tools for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the tools listed in:
Ref. NDT A350-A-57-54-63-00ZZZ-355Z-A
Ref. MP A350-A-27-5X-XX-00ZZZ-170Z-A
Ref. MP A350-A-53-35-83-01ZZZ-520Z-A
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
CONF 002
Referenced tools for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the tools listed in:
Ref. NDT A350-A-57-54-63-00ZZZ-353Z-A

### Page 20

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 20
Ref. MP A350-A-27-5X-XX-00ZZZ-170Z-A
Ref. MP A350-A-27-5X-XX-01ZZZ-170Z-A
Ref. MP A350-A-27-5X-XX-06ZZZ-170Z-A
Ref. MP A350-A-27-54-62-00ZZZ-720Z-A
Ref. MP A350-A-53-35-83-01ZZZ-520Z-A
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
Ref. MP A350-A-57-54-62-00ZZZ-520Z-A
Ref. MP A350-A-57-54-62-00ZZZ-720Z-A
CONF 003
Referenced tools for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the tools listed in:
Ref. NDT A350-A-57-54-63-00ZZZ-353Z-A
Ref. MP A350-A-27-5X-XX-00ZZZ-170Z-A
Ref. MP A350-A-27-5X-XX-01ZZZ-170Z-A
Ref. MP A350-A-27-5X-XX-06ZZZ-170Z-A
Ref. MP A350-A-27-54-62-00ZZZ-720Z-A
Ref. MP A350-A-53-35-83-01ZZZ-520Z-A
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
Ref. MP A350-A-57-54-62-00ZZZ-520Z-A
Ref. MP A350-A-57-54-62-00ZZZ-720Z-A
CONF ALL
C. CONSUMABLES
CONF 002
Consumables for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
03FDB1 Mineral Oil base Grease -Anti-FrettingPaste
06LCB1
Non Hardening Jointing
Putty - Medium T emp. Area
Chromate Free
08BAA9 Non Aqueous Cleaner -General
14SBA1 T extile - Lint free Cotton
CONF 003
Consumables for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
03FDB1 Mineral Oil base Grease -Anti-FrettingPaste

### Page 21

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 21
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
06LCB1
Non Hardening Jointing
Putty - Medium T emp. Area
Chromate Free
08BAA9 Non Aqueous Cleaner -General
14SBA1 T extile - Lint free Cotton
CONF 001
Referenced consumables for task set A350-A-57-XX-P077-01000-93BA-A
Inspection of the Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the consumable materials listed in:
Ref. MP A350-A-53-35-76-1CZZZ-720Z-A
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
CONF 002
Referenced consumables for task set A350-A-57-XX-P077-01000-93BA-A
Inspection of the Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the consumable materials listed in:
Ref. MP A350-A-27-54-62-00ZZZ-720Z-A
Ref. MP A350-A-53-35-76-1CZZZ-720Z-A
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
CONF 003
Referenced consumables for task set A350-A-57-XX-P077-01000-93BA-A
Inspection of the Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the consumable materials listed in:
Ref. MP A350-A-27-54-62-00ZZZ-720Z-A
Ref. MP A350-A-53-35-76-1CZZZ-720Z-A
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
CONF ALL
D. LIST OF NEW PARTS
CONF 002
Components for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
Procurement address D4296
AIRBUS Material, Logistics and Suppliers Standard
Parts
Customer Order Fulfilment
Phone: +49 (0) 40 50 76 40 02
E-mail: Please contact your Single Point Of Contact
(SPOC)
Internet: http://spares.airbus.com or via SPEC2000
NOTE(S)
For standard hardware the purchase order must be addressed to AIRBUS at the
address given above. Quote the number of this Service Bulletin, the MSN and, if
applicable the Retrofit Information Letter (RIL) reference.

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A350
SERVICE BULLETIN
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Page 22
ITEM PART No. QTY (UM) KEYWORD DRAWING SEE NOTES
4 ABS1149AP1125B(D4296) 2 WASHER (1) (2)
NOTE(S)
Refer to the AIRBUS Ref. SM if you find part numbers of hardware components which
you cannot identify. The SM will give you the correct part number to part number
relationship.
(1): The components listed above are not an AIRBUS Kit, the required parts must be
ordered as necessary through the given channel.
(2): Operator supplied standard hardware parts, required to accomplish this Service
Bulletin, are to be supplied from the operator's stock.
CONF 003
Components for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
Procurement address D4296
AIRBUS Material, Logistics and Suppliers Standard
Parts
Customer Order Fulfilment
Phone: +49 (0) 40 50 76 40 02
E-mail: Please contact your Single Point Of Contact
(SPOC)
Internet: http://spares.airbus.com or via SPEC2000
NOTE(S)
For standard hardware the purchase order must be addressed to AIRBUS at the
address given above. Quote the number of this Service Bulletin, the MSN and, if
applicable the Retrofit Information Letter (RIL) reference.
ITEM PART No. QTY (UM) KEYWORD DRAWING SEE NOTES
4 ABS1149AP1125B(D4296) 1 WASHER (1) (2)
NOTE(S)
Refer to the AIRBUS Ref. SM if you find part numbers of hardware components which
you cannot identify. The SM will give you the correct part number to part number
relationship.
(1): The components listed above are not an AIRBUS Kit, the required parts must be
ordered as necessary through the given channel.
(2): Operator supplied standard hardware parts, required to accomplish this Service
Bulletin, are to be supplied from the operator's stock.
CONF 002
Referenced parts for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the expendable parts listed in:
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A
CONF 003
Referenced parts for task set A350-A-57-XX-P077-01000-93BA-A Inspection of the
Trunnion Arm at the INBD Flap ASSY
T o accomplish this Service Bulletin it is necessary to use the expendable parts listed in:
Ref. MP A350-A-53-35-83-01ZZZ-720Z-A

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REV 00 Jan 31/23 A350-57-P077
Page 23
CONF 001
No parts
CONF ALL
E. LIST OF EXISTING PARTS
No parts

### Page 24

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 24
3. ACCOMPLISHMENT INSTRUCTIONS
Task set A350-A-57-XX-P077-01000-93BA-A (A350-A-57-XX-P077-01ZZZ-93BZ-A)
Inspection of the Trunnion Arm at the INBD Flap ASSY
WARNING: MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND ALL THE CAUTIONS
INCLUDED IN THE REFERENCED PROCEDURES.
WARNING: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN
POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND RELATED DOORS
- THE CARGO DOORS
- THE ENGINES
- THE PAYLOAD
- OTHER COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS
AND/OR DAMAGE TO EQUIPMENT.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES
ARE CLEAR. MOVEMENT OF THE FLIGHT CONTROL SURFACES CAN CAUSE
INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT OR EQUIPMENT.
WARNING: MAKE SURE THAT NO AIR IS SUPPLIED TO THE AIR CONDITIONING SYSTEM
FROM THE MAIN ENGINE, THE APU OR FROM A GROUND SOURCE. HOT
COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
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.
CAUTION: IF YOU EXTEND OR RETRACT THE FLAPS WITH A PNEUMATIC TOOL, MAKE
SURE THAT YOU DO THE LAST TURNS MANUALLY UNTIL THEY TOUCH
THE STOPS AT THE END POSITION. IF YOU DO THE LAST TURNS WITH A
PNEUMATIC TOOL, YOU CAN CAUSE DAMAGE TO THE FLAPS.
CAUTION: MAKE SURE THAT YOU DO NOT CAUSE DAMAGE TO THE SURFACES. THESE
COMPONENTS ARE MADE OF CARBON FIBER REINFORCED PLASTIC.
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.

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A350
SERVICE BULLETIN
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Page 25
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.
NOTE: The purpose of flowcharts is to supplement the information given in the Procedure and
Compliance paragraphs and not to serve as the primary source for tasks or compliance
times given in this Service Bulletin.
NOTE: Discarded parts must be managed at the operator's discretion.
A. TASK SET ASSOCIATED INFORMATION
CONF 001
Maintenance Configuration
Flaps/slats extended
CONF 002
Maintenance Configuration
Flaps/slats extended
CONF 003
Maintenance Configuration
Flaps/slats extended
Task Manpower
CONF 001
TOTAL MAN-HOURS 8.25 h
CONF 002
TOTAL MAN-HOURS 16.75 h
CONF 003
TOTAL MAN-HOURS 11.25 h
CONF 001
ELAPSED TIME (HOURS) 4.25 h
CONF 002
ELAPSED TIME (HOURS) 7.00 h
CONF 003
ELAPSED TIME (HOURS) 7.00 h

### Page 26

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REV 00 Jan 31/23 A350-57-P077
Page 26
CONF ALL
B. PREPARATION
CONF 001
(1) Task A350-A-57-XX-P077-01002-540A-A (A350-A-57-XX-P077-01ZZZ-540Z-A)
Job Set-up
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 2.50 h
Minimum Number of person 2
Elapsed Time 1.25 h
Referenced Information
Manuals/Drawings References/Sheets
INTRO A350-A-00-61-04-11ZZZ-018Z-D
MP
A350-A-24-41-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-53-35-76-1CZZZ-520Z-A
A350-A-53-35-83-01ZZZ-520Z-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.
(b) Do the manual extension of the flaps, refer to Ref. MP A350-A-27-5X-XX-00ZZZ-
170Z-A.
(c) Remove the access Panel 197JL (Panel 198JR), refer to Ref. MP A350-A-53-35-76-
1CZZZ-520Z-A.
(d) Retract the flaps fully, refer to Ref. MP A350-A-27-5X-XX-07ZZZ-170Z-A.
(e) Remove the cover ASSY, refer to Ref. MP A350-A-53-35-83-01ZZZ-520Z-A.
(f) Extend the flaps, refer to Ref. MP A350-A-27-5X-XX-00ZZZ-170Z-A.
CONF 002
(1) Task A350-A-57-XX-P077-01003-540A-A (A350-A-57-XX-P077-01ZZZ-540Z-A)
Job Set-up
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 2.50 h
Minimum Number of person 2
Elapsed Time 1.25 h
Referenced Information
Manuals/Drawings References/Sheets
INTRO A350-A-00-61-04-11ZZZ-018Z-D

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A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 27
Manuals/Drawings References/Sheets
MP
A350-A-24-41-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-53-35-76-1CZZZ-520Z-A
A350-A-53-35-83-01ZZZ-520Z-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.
(b) Do the manual extension of the flaps, refer to Ref. MP A350-A-27-5X-XX-00ZZZ-
170Z-A.
(c) Remove the access Panel 197JL (Panel 198JR), refer to Ref. MP A350-A-53-35-76-
1CZZZ-520Z-A.
(d) Retract the flaps fully, refer to Ref. MP A350-A-27-5X-XX-07ZZZ-170Z-A.
(e) Remove the cover ASSY, refer to Ref. MP A350-A-53-35-83-01ZZZ-520Z-A.
CONF 003
(1) Task A350-A-57-XX-P077-01004-540A-A (A350-A-57-XX-P077-01ZZZ-540Z-A)
Job Set-up
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 2.50 h
Minimum Number of person 2
Elapsed Time 1.25 h
Referenced Information
Manuals/Drawings References/Sheets
INTRO A350-A-00-61-04-11ZZZ-018Z-D
MP
A350-A-24-41-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-00ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-53-35-76-1CZZZ-520Z-A
A350-A-53-35-83-01ZZZ-520Z-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.
(b) Do the manual extension of the flaps, refer to Ref. MP A350-A-27-5X-XX-00ZZZ-
170Z-A.
(c) Remove the access Panel 197JL, refer to Ref. MP A350-A-53-35-76-1CZZZ-520Z-
A.

### Page 28

A350
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Page 28
(d) Retract the flaps fully, refer to Ref. MP A350-A-27-5X-XX-07ZZZ-170Z-A.
(e) Remove the LH cover ASSY, refer to Ref. MP A350-A-53-35-83-01ZZZ-520Z-A.
CONF ALL
C. PROCEDURE
CONF 002 003
(1) Task A350-A-57-XX-P077-08001-520A-A (A350-A-57-XX-P077-08ZZZ-520Z-A)
Remove the Trunnion Bolt from the INBD Flap ASSY, LH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
Access Panel 197JL561
Work location From Frame 59 to Frame 60
Manpower/Resources/Skills
Man-hours 1.50 h
Minimum Number of person 2
Elapsed Time 0.75 h
Skills Airframe
Material necessary to do the job
Consumables
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
08BAA9 Non Aqueous Cleaner -General
14SBA1 T extile - Lint free Cotton
Referenced Information
Manuals/Drawings References/Sheets
ASR A350-A-51-42-XX-01ZZZ-667Z-A
MP
A350-A-27-51-XX-07ZZZ-345Z-A
A350-A-27-5X-XX-06ZZZ-170Z-A
A350-A-57-54-62-00ZZZ-520Z-A
SD
A350-A-06-2X-XX-01ZZZ-04CZ-A
A350-A-06-3X-XX-01ZZZ-04CZ-A
A350-A-06-4X-XX-01ZZZ-04CZ-A
CML CONSUMABLE MATERIAL LIST (CML)
Procedure
Ref. Fig.BM Release the T ension in Flap Support 1, LH Side
Ref. Fig.BC Removal of the Trunnion Bolt from the INBD Flap ASSY, LH Side
(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 Frame (FR) identification, refer to Ref. SD A350-A-06-2X-XX-01ZZZ-
04CZ-A.
3 For the identification of access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.

### Page 29

A350
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REV 00 Jan 31/23 A350-57-P077
Page 29
4 For the specification of Material application codes given in this Service
Bulletin, refer to Ref. CML.
5 T ag all the parts you must remove and retain to make the subsequent
installation easier.
6 Put all the retained hardware in identified plastic bags and attach the bags
to the related unit.
7 Remove and install fasteners in accordance with Ref. ASR A350-A-51-42-XX-
01ZZZ-667Z-A.
(b) Release the tension in flap support lever 1 as specified in Ref. MP A350-A-57-54-
62-00ZZZ-520Z-A step 4.A.(1).
(c) Remove from the trunnion arm as specified in Ref. MP A350-A-57-54-62-00ZZZ-
520Z-A step 4.A.(3):
1 BOLT   Item (1) Retain
attached with:
1 NUT   Item (5) Retain
1 WASHER-KEY   Item (4) Discard
1 WASHER   Item (3) Retain
1 RETAINER   Item (2) Retain
NOTE: T o remove the bolt, item (1), you must unlock the tabs of the washer-
key, item (4).
(d) Clean the work area with:
  Non Aqueous Cleaner -
General
08BAA9  
and
  T extile - Lint free Cotton14SBA1  
(e) Put flap support lever 1 back in tension as specified in Ref. MP A350-A-57-54-62-
00ZZZ-520Z-A step 4.A.(4).
(f) Do the BITE function of the flap control and monitoring (INBD-flap drive
function), refer to Ref. MP A350-A-27-51-XX-07ZZZ-345Z-A.
(g) Extend the flaps fully, refer to Ref. MP A350-A-27-5X-XX-06ZZZ-170Z-A.

### Page 30

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHU-A-001-01 Fig.BM Sol.AA SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Release the T ension in Flap Support 1, LH Side
Page 30
CONF 002 003
B
A
FR59
FR60
B
FLAP SUPPORT 1
FLAP TORQUE-SHAFT ASSY
5011CV
FLAP T-BEVEL
GEARBOX
LSDS
FR35
FR74
Z197
A
ICN-A350-A-57XXP077-A-FAPE3-06PHU-A-001-01

### Page 31

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P3R-A-002-01 Fig.BC Sol.AA SHEET 1/2
REV 00 Jan 31/23 A350-57-P077Removal of the Trunnion Bolt
from the INBD Flap ASSY, LH Side Page 31
CONF 002 003
A
Z561
A
FR35
FR74
Z197
B
INBD FLAP
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06P3R-A-002-01

### Page 32

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P3S-A-002-01 Fig.BC Sol.AA SHEET 2/2
REV 00 Jan 31/23 A350-57-P077Removal of the Trunnion Bolt
from the INBD Flap ASSY, LH Side Page 32
CONF 002 003
C
B
TRUNNION ARM
C
FLAP SUPPORT
LEVER 1
(4)
(3)
(2)
(5)
(1)
ANTI ROTATION PIN
TRUNNION ARM
FLAP SUPPORT
LEVER 1
ICN-A350-A-57XXP077-A-FAPE3-06P3S-A-002-01

### Page 33

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 33
CONF 002
(2) Task A350-A-57-XX-P077-09001-520A-A (A350-A-57-XX-P077-09ZZZ-520Z-A)
Remove the Trunnion Bolt from the INBD Flap ASSY, RH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
Access Panel 198JR661
Work location From Frame 59 to Frame 60
Manpower/Resources/Skills
Man-hours 1.50 h
Minimum Number of person 2
Elapsed Time 0.75 h
Skills Airframe
Material necessary to do the job
Consumables
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
08BAA9 Non Aqueous Cleaner -General
14SBA1 T extile - Lint free Cotton
Referenced Information
Manuals/Drawings References/Sheets
ASR A350-A-51-42-XX-01ZZZ-667Z-A
MP
A350-A-27-51-XX-07ZZZ-345Z-A
A350-A-27-5X-XX-06ZZZ-170Z-A
A350-A-57-54-62-00ZZZ-520Z-A
SD
A350-A-06-2X-XX-01ZZZ-04CZ-A
A350-A-06-3X-XX-01ZZZ-04CZ-A
A350-A-06-4X-XX-01ZZZ-04CZ-A
CML CONSUMABLE MATERIAL LIST (CML)
Procedure
Ref. Fig.BN Release the T ension in Flap Support 1, RH Side
Ref. Fig.BD Removal of the Trunnion Bolt from the INBD Flap ASSY, RH Side
(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 Frame (FR) identification, refer to Ref. SD A350-A-06-2X-XX-01ZZZ-
04CZ-A.
3 For the identification of access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.
4 For the specification of Material application codes given in this Service
Bulletin, refer to Ref. CML.
5 T ag all the parts you must remove and retain to make the subsequent
installation easier.

### Page 34

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 34
6 Put all the retained hardware in identified plastic bags and attach the bags
to the related unit.
7 Remove and install fasteners in accordance with Ref. ASR A350-A-51-42-XX-
01ZZZ-667Z-A.
(b) Release the tension in flap support lever 1 as specified in Ref. MP A350-A-57-54-
62-00ZZZ-520Z-A step 4.A.(1).
(c) Remove from the trunnion arm as specified in Ref. MP A350-A-57-54-62-00ZZZ-
520Z-A step 4.A.(3):
1 BOLT   Item (1) Retain
attached with:
1 NUT   Item (5) Retain
1 WASHER-KEY   Item (4) Discard
1 WASHER   Item (3) Retain
1 RETAINER   Item (2) Retain
NOTE: T o remove the bolt, item (1), you must unlock the tabs of the washer-
key, item (4).
(d) Clean the work area with:
  Non Aqueous Cleaner -
General
08BAA9  
and
  T extile - Lint free Cotton14SBA1  
(e) Put flap support lever 1 back in tension as specified in Ref. MP A350-A-57-54-62-
00ZZZ-520Z-A step 4.A.(4).
(f) Do the BITE function of the flap control and monitoring (INBD-flap drive
function), refer to Ref. MP A350-A-27-51-XX-07ZZZ-345Z-A.
(g) Extend the flaps fully, refer to Ref. MP A350-A-27-5X-XX-06ZZZ-170Z-A.

### Page 35

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHV-A-001-01 Fig.BN Sol.AA SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Release the T ension in Flap Support 1, RH Side
Page 35
CONF 002
B
A
FR35
FR74
FR59
FR60
B
FLAP SUPPORT 1
FLAP T-BEVEL
GEARBOX
LSDS
5111CV
FLAP TORQUE-SHAFT ASSY
Z198 A
ICN-A350-A-57XXP077-A-FAPE3-06PHV-A-001-01

### Page 36

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P3T-A-002-01 Fig.BD Sol.AA SHEET 1/2
REV 00 Jan 31/23 A350-57-P077Removal of the Trunnion Bolt
from the INBD Flap ASSY, RH Side Page 36
CONF 002
A
FR35
FR74
Z661
A
Z198
B
INBD FLAP
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06P3T-A-002-01

### Page 37

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P3U-A-002-01 Fig.BD Sol.AA SHEET 2/2
REV 00 Jan 31/23 A350-57-P077Removal of the Trunnion Bolt
from the INBD Flap ASSY, RH Side Page 37
CONF 002
B
C
C
TRUNNION ARM
FLAP SUPPORT
LEVER 1
(4)
(3)
(2)
(5)
(1)
ANTI ROTATION PIN
TRUNNION ARM
FLAP SUPPORT
LEVER 1
ICN-A350-A-57XXP077-A-FAPE3-06P3U-A-002-01

### Page 38

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 38
CONF 001
(3) Task A350-A-57-XX-P077-04001-300A-A (A350-A-57-XX-P077-04ZZZ-300Z-A)
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
561 Access Panel 197JL
Manpower/Resources/Skills
Man-hours 1.50 h
Minimum Number of person 1
Elapsed Time 1.50 h
Skills Non-Destructive T esting
Referenced Information
Manuals/Drawings References/Sheets
NDT A350-A-57-54-63-00ZZZ-355Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-06-4X-XX-01ZZZ-04CZ-A
Procedure
Ref. Fig.FA Flowchart
Ref. Fig.BI Inspection Area
(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 access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.
(b) At the threshold given in the PLANNING INFORMATION paragraph E.(2), do the
ultrasonic inspection of the trunnion arm at the INBD flap ASSY in accordance
with Ref. NDT A350-A-57-54-63-00ZZZ-355Z-A:
1 If crack is found:
a Contact AIRBUS for further instructions.
2 If no crack is found:
a Repeat the inspection in accordance with Ref. T ask set A350-A-
57-XX-P077-01ZZZ-93BZ-A at the interval given in the PLANNING
INFORMATION paragraph 1.E.(2).
(c) After completion of all inspections, complete and send the Inspection Report
sheet in accordance with Ref. T ask A350-A-57-XX-P077-02ZZZ-90AZ-A.

### Page 39

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P3Y-A-002-01 Fig.FA Sol.AA SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Flowchart
Page 39
CONF 001
COMPLIANCE TIMES GIVEN IN THIS SERVICE BULLETIN.
AND COMPLIANCE PARAGRAPHS AND NOT TO SERVE AS THE PRIMARY SOURCE FOR TASKS OR
NOTE:
THE PURPOSE OF FLOWCHARTS IS TO SUPPLEMENT THE INFORMATION GIVEN IN THE PROCEDURE
FOR THE ACCOMPLISHMENT TIMESCALE, REFER TO PARAGRAPH 1.E.(2).01
NO CRACK FOUND?IS THERE ANY
YES
REPEAT THE
INSPECTION 01
DO AN SDI WITH ULTRASONIC
ON THE TRUNNION ARM OF
CONTACT AIRBUS FOR FURTHER
INSTRUCTIONS 01
THE INBD FLAP ASSY, LH SIDE 01
ICN-A350-A-57XXP077-A-FAPE3-06P3Y-A-002-01

### Page 40

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06OY9-A-002-01 Fig.BI Sol.AA SHEET 1/2
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 40
CONF 001
AB
INBD FLAP
Z561
FR35
FR74
PAX DOOR 3
Z197
A
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06OY9-A-002-01

### Page 41

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PAY-A-002-01 Fig.BI Sol.AA SHEET 2/2
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 41
CONF 001
SCAN PATH FOR INBD EDGE
01
NOTE:
INSPECTION AREA.
01
B
LUG HOLE
PINTLE HOLE
SCAN PATH FOR OUTBD EDGE
F
W
D
INBD
DO THE ULTRASONIC INSPECTION OF THE UPPER OR LOWER SURFACE OF THE TRUNNION ARM
IN ACCORDANCE WITH NDT A350-A-57-54-63-00ZZZ-355Z-A.
ICN-A350-A-57XXP077-A-FAPE3-06PAY-A-002-01

### Page 42

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 42
CONF 002 003
(3) Task A350-A-57-XX-P077-04002-300A-A (A350-A-57-XX-P077-04ZZZ-300Z-A)
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, LH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
561 Access Panel 197JL
Manpower/Resources/Skills
Man-hours 2.00 h
Minimum Number of person 1
Elapsed Time 2.00 h
Skills Non-Destructive T esting
Referenced Information
Manuals/Drawings References/Sheets
NDT A350-A-57-54-63-00ZZZ-353Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-06-4X-XX-01ZZZ-04CZ-A
Procedure
Ref. Fig.FA Flowchart
Ref. Fig.BI Inspection Area
(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 access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.
(b) At the threshold given in the PLANNING INFORMATION paragraph E.(2), do the
HFEC inspection of the trunnion arm at the INBD flap ASSY in accordance with
Ref. NDT A350-A-57-54-63-00ZZZ-353Z-A:
1 If crack is found:
a Contact AIRBUS for further instructions.
2 If no crack is found:
a Repeat the inspection in accordance with Ref. T ask set A350-A-
57-XX-P077-01ZZZ-93BZ-A at the interval given in the PLANNING
INFORMATION paragraph 1.E.(2).
(c) After completion of all inspections, complete and send the Inspection Report
sheet in accordance with Ref. T ask A350-A-57-XX-P077-02ZZZ-90AZ-A.

### Page 43

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P3X-A-002-01 Fig.FA Sol.AB SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Flowchart
Page 43
CONF 002 003
COMPLIANCE TIMES GIVEN IN THIS SERVICE BULLETIN.
AND COMPLIANCE PARAGRAPHS AND NOT TO SERVE AS THE PRIMARY SOURCE FOR TASKS OR
NOTE:
THE PURPOSE OF FLOWCHARTS IS TO SUPPLEMENT THE INFORMATION GIVEN IN THE PROCEDURE
FOR THE ACCOMPLISHMENT TIMESCALE, REFER TO PARAGRAPH 1.E.(2).01
NO CRACK FOUND?IS THERE ANY
YES
REPEAT THE
INSPECTION 01
DO AN SDI WITH HFEC
ON THE TRUNNION ARM OF
CONTACT AIRBUS FOR FURTHER
INSTRUCTIONS 01
THE INBD FLAP ASSY, LH SIDE 01
ICN-A350-A-57XXP077-A-FAPE3-06P3X-A-002-01

### Page 44

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHZ-A-002-01 Fig.BI Sol.AB SHEET 1/3
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 44
CONF 002 003
AB C
INBD FLAP
Z561
FR35
FR74
PAX DOOR 3
Z197
A
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06PHZ-A-002-01

### Page 45

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PI0-A-001-01 Fig.BI Sol.AB SHEET 2/3
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 45
CONF 002 003
01
NOTE:
DO THE HFEC INSPECTION OF THE INBD SIDE OF THE TRUNNION ARM IN ACCORDANCE
WITH NDT A350-A-57-54-63-00ZZZ-353Z-A.
INSPECTION AREA.
B
A A
LUG HOLE
PINTLE HOLE
01
A
A
INBD SIDE OF THE TRUNNION ARM
ICN-A350-A-57XXP077-A-FAPE3-06PI0-A-001-01

### Page 46

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PI1-A-001-01 Fig.BI Sol.AB SHEET 3/3
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 46
CONF 002 003
C
LUG HOLE PINTLE HOLE
B B
02
02
NOTE:
DO THE HFEC INSPECTION OF THE OUTBD SIDE OF THE TRUNNION ARM IN ACCORDANCE
WITH NDT A350-A-57-54-63-00ZZZ-353Z-A.
INSPECTION AREA.
OUTBD SIDE OF THE TRUNNION ARM
B
B
ICN-A350-A-57XXP077-A-FAPE3-06PI1-A-001-01

### Page 47

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 47
CONF 001
(4) Task A350-A-57-XX-P077-05001-300A-A (A350-A-57-XX-P077-05ZZZ-300Z-A)
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, RH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
661 Access Panel 198JR
Manpower/Resources/Skills
Man-hours 1.50 h
Minimum Number of person 1
Elapsed Time 1.50 h
Skills Non-Destructive T esting
Referenced Information
Manuals/Drawings References/Sheets
NDT A350-A-57-54-63-00ZZZ-355Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-06-4X-XX-01ZZZ-04CZ-A
Procedure
Ref. Fig.FB Flowchart
Ref. Fig.BJ Inspection Area
(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 access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.
(b) At the threshold given in the PLANNING INFORMATION paragraph E.(2), do the
ultrasonic inspection of the trunnion arm at the INBD flap ASSY in accordance
with Ref. NDT A350-A-57-54-63-00ZZZ-355Z-A:
1 If crack is found:
a Contact AIRBUS for further instructions.
2 If no crack is found:
a Repeat the inspection in accordance with Ref. T ask set A350-A-
57-XX-P077-01ZZZ-93BZ-A at the interval given in the PLANNING
INFORMATION paragraph 1.E.(2).
(c) After completion of all inspections, complete and send the Inspection Report
sheet in accordance with Ref. T ask A350-A-57-XX-P077-02ZZZ-90AZ-A.

### Page 48

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06QL6-A-001-01 Fig.FB Sol.AA SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Flowchart
Page 48
CONF 001
COMPLIANCE TIMES GIVEN IN THIS SERVICE BULLETIN.
AND COMPLIANCE PARAGRAPHS AND NOT TO SERVE AS THE PRIMARY SOURCE FOR TASKS OR
NOTE:
THE PURPOSE OF FLOWCHARTS IS TO SUPPLEMENT THE INFORMATION GIVEN IN THE PROCEDURE
FOR THE ACCOMPLISHMENT TIMESCALE, REFER TO PARAGRAPH 1.E.(2).01
NO CRACK FOUND?IS THERE ANY
YES
REPEAT THE
INSPECTION 01
DO AN SDI WITH ULTRASONIC
ON THE TRUNNION ARM OF
CONTACT AIRBUS FOR FURTHER
INSTRUCTIONS 01
THE INBD FLAP ASSY, RH SIDE 01
ICN-A350-A-57XXP077-A-FAPE3-06QL6-A-001-01

### Page 49

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06OY4-A-002-01 Fig.BJ Sol.AA SHEET 1/2
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 49
CONF 001
B
A
INBD FLAP
FR35
FR74
PAX DOOR 3
Z198
Z661
A
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06OY4-A-002-01

### Page 50

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PAV-A-002-01 Fig.BJ Sol.AA SHEET 2/2
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 50
CONF 001
SCAN PATH FOR INBD EDGE
01
NOTE:
INSPECTION AREA.
B
SCAN PATH FOR OUTBD EDGE
F
W
D
01
INBD
PINTLE HOLE
LUG HOLE
DO THE ULTRASONIC INSPECTION OF THE UPPER OR LOWER SURFACE OF THE TRUNNION ARM
IN ACCORDANCE WITH NDT A350-A-57-54-63-00ZZZ-355Z-A.
ICN-A350-A-57XXP077-A-FAPE3-06PAV-A-002-01

### Page 51

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 51
CONF 002
(4) Task A350-A-57-XX-P077-05002-300A-A (A350-A-57-XX-P077-05ZZZ-300Z-A)
Do an SDI of the Trunnion Arm at the INBD Flap ASSY, RH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
661 Access Panel 198JR
Manpower/Resources/Skills
Man-hours 2.00 h
Minimum Number of person 1
Elapsed Time 2.00 h
Skills Non-Destructive T esting
Referenced Information
Manuals/Drawings References/Sheets
NDT A350-A-57-54-63-00ZZZ-353Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-06-4X-XX-01ZZZ-04CZ-A
Procedure
Ref. Fig.FB Flowchart
Ref. Fig.BJ Inspection Area
(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 access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.
(b) At the threshold given in the PLANNING INFORMATION paragraph E.(2), do the
HFEC inspection of the trunnion arm at the INBD flap ASSY in accordance with
Ref. NDT A350-A-57-54-63-00ZZZ-353Z-A:
1 If crack is found:
a Contact AIRBUS for further instructions.
2 If no crack is found:
a Repeat the inspection in accordance with Ref. T ask set A350-A-
57-XX-P077-01ZZZ-93BZ-A at the interval given in the PLANNING
INFORMATION paragraph 1.E.(2).
(c) After completion of all inspections, complete and send the Inspection Report
sheet in accordance with Ref. T ask A350-A-57-XX-P077-02ZZZ-90AZ-A.

### Page 52

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06QL7-A-001-01 Fig.FB Sol.AB SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Flowchart
Page 52
CONF 002
COMPLIANCE TIMES GIVEN IN THIS SERVICE BULLETIN.
AND COMPLIANCE PARAGRAPHS AND NOT TO SERVE AS THE PRIMARY SOURCE FOR TASKS OR
NOTE:
THE PURPOSE OF FLOWCHARTS IS TO SUPPLEMENT THE INFORMATION GIVEN IN THE PROCEDURE
FOR THE ACCOMPLISHMENT TIMESCALE, REFER TO PARAGRAPH 1.E.(2).01
NO CRACK FOUND?IS THERE ANY
YES
REPEAT THE
INSPECTION 01
DO AN SDI WITH HFEC
ON THE TRUNNION ARM OF
THE INBD FLAP ASSY, RH SIDE
CONTACT AIRBUS FOR FURTHER
INSTRUCTIONS 01
01
ICN-A350-A-57XXP077-A-FAPE3-06QL7-A-001-01

### Page 53

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHW-A-002-01 Fig.BJ Sol.AB SHEET 1/3
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 53
CONF 002
A
B C
INBD FLAP
FR35
FR74
PAX DOOR 3
Z198
Z661
A
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06PHW-A-002-01

### Page 54

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHX-A-001-01 Fig.BJ Sol.AB SHEET 2/3
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 54
CONF 002
01
NOTE:
DO THE HFEC INSPECTION OF THE INBD SIDE OF THE TRUNNION ARM IN ACCORDANCE
WITH NDT A350-A-57-54-63-00ZZZ-353Z-A.
INSPECTION AREA.
B
A A
01
INBD SIDE OF THE TRUNNION ARM
A
A
LUG HOLE
PINTLE HOLE
ICN-A350-A-57XXP077-A-FAPE3-06PHX-A-001-01

### Page 55

A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHY-A-001-01 Fig.BJ Sol.AB SHEET 3/3
REV 00 Jan 31/23 A350-57-P077Inspection Area
Page 55
CONF 002
C
B B
02
02
NOTE:
DO THE HFEC INSPECTION OF THE OUTBD SIDE OF THE TRUNNION ARM IN ACCORDANCE
WITH NDT A350-A-57-54-63-00ZZZ-353Z-A.
INSPECTION AREA.
B
B
LUG HOLEPINTLE HOLE
OUTBD SIDE OF THE TRUNNION ARM
ICN-A350-A-57XXP077-A-FAPE3-06PHY-A-001-01

### Page 56

A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 56
(5) Task A350-A-57-XX-P077-07001-720A-A (A350-A-57-XX-P077-07ZZZ-720Z-A)
Install the Trunnion Bolt on the INBD Flap ASSY, LH Side
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
Access Panel 197JL561
Work location From Frame 59 to Frame 60
Manpower/Resources/Skills
Man-hours 2.00 h
Minimum Number of person 2
Elapsed Time 1.00 h
Skills Airframe
Material necessary to do the job
Consumables
ITEM REFERENCE CML DESCRIPTION DRAWING SEE NOTES
03FDB1 Mineral Oil base Grease -Anti-FrettingPaste
06LCB1
Non Hardening Jointing
Putty - Medium T emp. Area
Chromate Free
08BAA9 Non Aqueous Cleaner -General
14SBA1 T extile - Lint free Cotton
Components
ITEM PART No. QTY (UM) KEYWORD DRAWING SEE NOTES
4 ABS1149AP1125B 1 WASHER
Referenced Information
Manuals/Drawings References/Sheets
ASR
A350-A-51-24-XX-01ZZZ-667Z-A
A350-A-51-42-XX-01ZZZ-667Z-A
A350-A-51-75-12-00ZZZ-660Z-A
MP
A350-A-20-51-50-01ZZZ-25BZ-A
A350-A-27-5X-XX-01ZZZ-170Z-A
A350-A-27-5X-XX-07ZZZ-170Z-A
A350-A-57-54-62-00ZZZ-720Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-AA350-A-06-4X-XX-01ZZZ-04CZ-A
CML CONSUMABLE MATERIAL LIST (CML)
Procedure
Ref. Fig.BM Release the T ension in Flap Support 1, LH Side
Ref. Fig.BG Installation of the Trunnion Bolt on the INBD Flap ASSY, LH Side
(a) Standard practices given in this procedure:
1 For identification of zones, refer to Ref. SD A350-A-06-3X-XX-01ZZZ-04CZ-A.

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A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 57
2 For the identification of access panels, refer to Ref. SD A350-A-06-4X-XX-
01ZZZ-04CZ-A.
3 For the specification of Material application codes given in this Service
Bulletin, refer to Ref. CML.
4 Remove and install fasteners in accordance with Ref. ASR A350-A-51-42-XX-
01ZZZ-667Z-A.
5 T o torque tighten the standard threaded fasteners, refer to Ref. MP A350-A-
20-51-50-01ZZZ-25BZ-A.
6 Apply sealant in accordance with Ref. ASR A350-A-51-24-XX-01ZZZ-667Z-A.
7 Repair the paint coating in accordance with Ref. ASR A350-A-51-75-12-
00ZZZ-660Z-A.
(b) Retract the flaps fully, refer to Ref. MP A350-A-27-5X-XX-07ZZZ-170Z-A.
(c) Do the installation procedure as specified in Ref. MP A350-A-57-54-62-00ZZZ-
720Z-A step 4.H.(4).
(d) Install the trunnion bolt on the trunnion arm as specified in Ref. MP A350-A-57-
54-62-00ZZZ-720Z-A step 4.H.(5):
1 Use the inclinometer to set the INBD and the OUTBD flaps to the -2 deg
position, refer to Ref. MP A350-A-27-5X-XX-01ZZZ-170Z-A.
2 Apply anti-fretting corrosion compound to the bolt, nut and washer:
  Mineral Oil base Grease
- Anti-FrettingPaste
03FDB1  
3 Install at flap support lever 1:
1 BOLT   Item (1) Retained
attach with:
1 RETAINER   Item (2) Retained
NOTE: Make sure that the retainer, item (2), engages with the anti-
rotation pin.
1 WASHER   Item (3) Retained
1 WASHER-KEY ABS1149AP1125B Item 4
NOTE: You must apply anti-fretting corrosion compound to the mating
surface of the washer key, item 4. Wrong application may cause
damage to the key washer.
1 NUT   Item (5) Retained
with:
  Non Hardening Jointing
Putty - Medium T emp.
Area Chromate Free
06LCB1  
4 T orque the nuts, item (5) between 18.30 m.daN (1619.687 lbf.in) and 19.80
m.daN (1752.448 lbf.in).
5 Bend the tabs of the tab washer, item 4, against the notches of the nut.

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A350
SERVICE BULLETIN
REV 00 Jan 31/23 A350-57-P077
Page 58
6 Clean the work area with:
  Non Aqueous Cleaner -
General
08BAA9  
and
  T extile - Lint free Cotton14SBA1  
(e) Put flap support lever 1 back in tension as specified in Ref. MP A350-A-57-54-62-
00ZZZ-720Z-A step 4.H.(6).
(f) On the flap support lever 1, do the marking on the nut, item (5) as specified in
Ref. MP A350-A-57-54-62-00ZZZ-720Z-A step 4.I.(1).

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A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06PHU-A-001-01 Fig.BM Sol.AA SHEET 1/1
REV 00 Jan 31/23 A350-57-P077Release the T ension in Flap Support 1, LH Side
Page 59
CONF 002
B
A
FR59
FR60
B
FLAP SUPPORT 1
FLAP TORQUE-SHAFT ASSY
5011CV
FLAP T-BEVEL
GEARBOX
LSDS
FR35
FR74
Z197
A
ICN-A350-A-57XXP077-A-FAPE3-06PHU-A-001-01

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A350
SERVICE BULLETIN
Figure ICN-A350-A-57XXP077-A-FAPE3-06P11-A-002-01 Fig.BG Sol.AA SHEET 1/2
REV 00 Jan 31/23 A350-57-P077Installation of the Trunnion Bolt
on the INBD Flap ASSY, LH Side Page 60
CONF 002
A
Z561
A
FR35
FR74
Z197
B
INBD FLAP
NOTE:
FLAP SHOWN AS REMOVED FROM AIRCRAFT FOR CLARITY ONLY.
ICN-A350-A-57XXP077-A-FAPE3-06P11-A-002-01

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