# Airbus Service Bulletin A350-27-P026

Copy: No revision named ("SB A350-27-P026"), 22 pages: PDF https://openairdocs.org/files/sha256/ac/9e/ac9e4417fdf63a5de1bdb09b178f9b20c77375d1bdf711ef9d38017ff00d0aaa; text https://openairdocs.org/service-documents/airbus/a350-27-p026/file/ac9e4417fdf6.md. Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2019-0194, the docket of AD 2019-19-14. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Airbus](https://openairdocs.org/service-documents/airbus.md)
- Type: Service bulletin (Service Bulletin)
- Number: A350-27-P026
- Page: https://openairdocs.org/service-documents/airbus/a350-27-p026

## Text (22 pages)

Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2019-0194, the docket of AD 2019-19-14. 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 Nov 15/18 A350-27-P026
Page 1
CONF ALL
AIRBUS S.A.S.
Customer Services
T echnical Data Support and Services
31703 Blagnac Cedex
FRANCE
 
The content of this document is the property of Airbus.
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: 27
TITLE: FLIGHT CONTROLS - INSPECTION/CHECK FOR POTENTIAL CRACKS ON
RAW MATERIAL OF SLAT GEARED ROTARY ACTUATOR (SGRA)
MODIFICATION No.:
None

### Page 2

A350
SERVICE BULLETIN
SUMMARY
REV 00 Nov 15/18 A350-27-P026
Page 2
ATA SYSTEM: 27
TITLE: FLIGHT CONTROLS - INSPECTION/CHECK FOR POTENTIAL CRACKS ON
RAW MATERIAL OF SLAT GEARED ROTARY ACTUATOR (SGRA)
SUMMARY
This summary is for information only and is not approved for modification of the aircraft.
A. MODIFICATIONS
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.
B. REASON
(1) History
Some ring gears of the Slat Geared Rotary Actuator (SGRA) have been found cracked
during manufacturing. The root cause analysis identified a quality issue affecting
some raw material batches, together with no adequate crack inspection. A potentially
cracked output ring gear or fixed ring gear could lead to free-wheeling of the SGRA
output shaft.
The slat system stops and holds the control surfaces in position in case of a single
failure of the SGRA. However, in combination with an additional independent failure,
an uncontrolled movement of the affected slat surface cannot be excluded.
This quality issue does not concern the Droop Nose Geared Rotary Actuator.
(2) Objective/Action
This Service Bulletin requires:
- the check of the PNR and SN of the SGRA installed on aircraft, either by visual
inspection on aircraft or by review of the aircraft delivery and maintenance
records,
- the replacement of all affected SGRA in the list of suspected units,
- the shipment of removed SGRA to LIEBHERR-AEROSPACE LINDENBERG GmbH for
further inspection and identification with SB reference on the placard.
(3) Advantages
Accomplishment of this Service Bulletin will ensure prevention of possible damage.
(4) Operational/Maintenance Consequences
None
C. GENERAL EVALUATION
EVALUATION TABLE
COMPLIANCE MANDATORY COST SAVING NO

### Page 3

A350
SERVICE BULLETIN
SUMMARY
REV 00 Nov 15/18 A350-27-P026
Page 3
EVALUATION TABLE
A/C OPERATION
AFFECTED
NO VENDOR SB YES
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
No specific aircraft maintenance configuration required.
E. MATERIAL PRICE INFORMATION
(1) Inspect the SGRA PNR and SN
(a) T ask set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and SN
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET QTYPER A/C PRICE PER A/C MAIN PARTS
Equipment See SB See Note SGRA
NOTE: Price information to be obtained from the given supplier.
F. APPLICABILITY
This Service Bulletin is applicable to this (these) operator(s):
AAR CAL CPA CRK DAL DLH ETH FBU FIN FWI HVN MAS MAU QTR SIA THA
G. CONCURRENT REQUIREMENTS
None
H. NATURE OF THE WORK
(1) Inspect the SGRA PNR and SN
(a) T ask set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and SN
AIRCRAFT NO
EQUIPMENT YES
I. MANPOWER
(1) Inspect the SGRA PNR and SN
(a) T ask set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and SN
MANPOWER
TOTAL MAN-HOURS 20.25 h
ELAPSED TIME (HOURS) 20.25 h
Additional man-hours related to Vendor SB; refer to:
Replace the SGRA if necessary Ref. LIEBHERR-AEROSPACE LINDENBERG
(D9893) VSB 4774A-27-01

### Page 4

A350
SERVICE BULLETIN
SUMMARY
REV 00 Nov 15/18 A350-27-P026
Page 4
MANPOWER
Ref. LIEBHERR-AEROSPACE LINDENBERG
(D9893) VSB 4775A-27-01

### Page 5

A350
SERVICE BULLETIN
SUMMARY
Figure ICN-A350-A-27XXP026-A-FAPE3-04CWR-A-001-01 SHEET 1/1
REV 00 Nov 15/18 A350-27-P026General overview
Page 5
J. GENERAL OVERVIEW
CONF ALL
LH SHOWN
RH SYMMETRICAL
Z500
Z600
SLAT GEARED ROTARY ACTUATOR
TO BE INSPECTED
A
A
A
ICN-A350-A-27XXP026-A-FAPE3-04CWR-A-001-01

### Page 6

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 6
ATA SYSTEM: 27
TITLE: FLIGHT CONTROLS - INSPECTION/CHECK FOR POTENTIAL CRACKS ON
RAW MATERIAL OF SLAT GEARED ROTARY ACTUATOR (SGRA)
1. PLANNING INFORMATION
A. APPLICABILITY
(1) Models
ON A/C 0088
350-1041
ON A/C 0037, 0039, 0044, 0061-0064, 0066-0070, 0072-0087, 0089, 0091, 0097, 0099-0101,
0103-0107, 0109, 0111, 0113, 0115-0117, 0119-0124, 0127-0129, 0137, 0138, 0140,
0142-0151, 0153-0155, 0157-0160, 0162, 0164, 0165, 0168, 0170, 0173-0177, 0179-0186,
0190-0193, 0195-0199, 0201
350-941
CONF ALL
(2) Applicability by MSN
0037 0039 0044 0061-0064 0066-0070 0072-0089 0091 0097 0099-0101 0103-0107
0109 0111 0113 0115-0117 0119-0124 0127-0129 0137 0138 0140 0142-0151
0153-0155 0157-0160 0162 0164 0165 0168 0170 0173-0177 0179-0186 0190-0193
0195-0199 0201
(3) MSN by configuration
MSN CONFIGURATION
0037 0039 0044 0061 0062 0063 0064 0066 0067 0068 0069
0070 0072 0073 0074 0075 0076 0077 0078 0079 0080 0081
0082 0083 0084 0085 0086 0087 0088 0089 0091 0097 0099
0100 0101 0103 0104 0105 0106 0107 0109 0111 0113 0115
0116 0117 0119 0120 0121 0122 0123 0124 0127 0128 0129
0137 0138 0140 0142 0143 0144 0145 0146 0147 0148 0149
0150 0151 0153 0154 0155 0157 0158 0159 0160 0162 0164
0165 0168 0170 0173 0174 0175 0176 0177 0179 0180 0181
0182 0183 0184 0185 0186 0190 0191 0192 0193 0195 0196
0197 0198 0199 0201
001
(4) Configuration definition
Configuration 001
CONF 001 is applicable for all the aircraft affected by this Service Bulletin as a
standard configuration.
B. CONCURRENT REQUIREMENTS
None
C. REASON
(1) History
Some ring gears of the Slat Geared Rotary Actuator (SGRA) have been found cracked
during manufacturing. The root cause analysis identified a quality issue affecting
some raw material batches, together with no adequate crack inspection. A potentially
cracked output ring gear or fixed ring gear could lead to free-wheeling of the SGRA
output shaft.

### Page 7

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 7
The slat system stops and holds the control surfaces in position in case of a single
failure of the SGRA. However, in combination with an additional independent failure,
an uncontrolled movement of the affected slat surface cannot be excluded.
This quality issue does not concern the Droop Nose Geared Rotary Actuator.
(2) Objective/Action
This Service Bulletin requires:
- the check of the PNR and SN of the SGRA installed on aircraft, either by visual
inspection on aircraft or by review of the aircraft delivery and maintenance
records,
- the replacement of all affected SGRA in the list of suspected units,
- the shipment of removed SGRA to LIEBHERR-AEROSPACE LINDENBERG GmbH for
further inspection and identification with SB reference on the placard.
(3) Advantages
Accomplishment of this Service Bulletin will ensure prevention of possible damage.
(4) Operational/Maintenance Consequences
None
D. DESCRIPTION
T o accomplish this Service Bulletin it is necessary to:
(1) Inspect the SGRA PNR and SN
(a) T ask set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and SN
1 Inspect the SGRA PNR and SN
2 Replace the SGRA if necessary
E. COMPLIANCE
(1) Classification
MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale
Accomplishment of this Service Bulletin must be done within 15000 Flight Hours (FH)
from issuance of this Service Bulletin.
This Service Bulletin has been classified Mandatory. It is expected that an
Airworthiness Directive (AD) published by the European Aviation Safety Agency (EASA)
will be issued to confirm this classification. It is anticipated that the AD will confirm
the thresholds 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 Design
Organisation Approval No. 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

### Page 8

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 8
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) Inspect the SGRA PNR and SN
(a) T ask set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and SN
PREPARATION
Job Set-up 0.25 h
PROCEDURE
Inspect the SGRA PNR and SN 8.00 h
PREPARATION FOR TEST
Prepare for T est 5.00 h
TEST
Operational T est 1.00 h
CLOSE-UP
Close-up 6.00 h
TOTAL MAN-HOURS 20.25 h
ELAPSED TIME (HOURS) 20.25 h
Additional man-hours related to Vendor SB; refer to:
Replace the SGRA if necessary Ref. LIEBHERR-AEROSPACE LINDENBERG
(D9893) VSB 4774A-27-01
Ref. LIEBHERR-AEROSPACE LINDENBERG
(D9893) VSB 4775A-27-01
NOTE: The time needed for the replacement of the SGRA is 1.50 MH per unit,
as given in Ref. LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB
4774A-27-01 and Ref. LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB
4775A-27-01.
NOTE: The minimum man-hours necessary to accomplish this Service Bulletin
are those for the Inspection. Depending on the inspection result,
additional man-hours can apply.
H. WEIGHT AND BALANCE
Not changed
I. ELECTRICAL LOAD DATA
Not changed
J. REFERENCES
(1) Inspect the SGRA PNR and SN
(a) T ask set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and SN
ELECTRICAL STANDARD PRACTICES (ESP)
A350-A-20-55-XX-01ZZZ-042Z-A

### Page 9

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 9
INTRODUCTION (INTRO)
A350-A-00-61-04-11ZZZ-018Z-D
MAINTENANCE PROCEDURE (MP)
A350-A-24-41-XX-00ZZZ-170Z-A A350-A-27-84-XX-00ZZZ-320Z-A
A350-A-27-84-53-00ZZZ-720Z-A
A350-A-27-84-53-07ZZZ-520Z-A
SYSTEM DESCRIPTION (SD)
A350-A-06-3X-XX-01ZZZ-04CZ-A
TECHNICAL FOLLOW UP (TFU)
27.84.00.014
VENDOR SERVICE BULLETIN (VSB)
LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB 4774A-27-01
LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB 4775A-27-01
K. PUBLICATION AFFECTED
None
L. INDUSTRY SUPPORT INFORMATION
Industry support terms for the equipment must be negotiated with the equipment supplier.
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.

### Page 10

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 10
2. MATERIAL INFORMATION
A. MATERIAL APPLICABILITY
Material for task set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR and
SN
MATERIAL QTY SEE NOTES
Referenced tools See SB
Equipment See SB
B. TOOLING
Referenced tools for task set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA
PNR and SN
NOTE: T o accomplish this Service Bulletin it is necessary to use the tools listed in the
subsequent referenced tasks:
Ref. MP A350-A-27-84-53-07ZZZ-520Z-A
Ref. MP A350-A-27-84-53-00ZZZ-720Z-A
C. CONSUMABLES
No consumables
D. LIST OF NEW PARTS
Equipment for task set A350-A-27-XX-P026-01000-93BA-A Inspect the SGRA PNR
and SN
Procurement address D9893
Liebherr-Aerospace Lindenberg GmbH
Customer Services
Pfaenderstrasse 50-52
88161 LINDENBERG
GERMANY
Phone: +49 (0) 8381 460
Fax: +49 (0) 8381 46 4103
E-mail: rfq.lli@liebherr.com
Internet: http://www.liebherr.aero
NOTE(S)
Vendor parts are to be procured from the address given above.
ITEM PART No. QTY (UM) KEYWORD DRAWING SEE NOTES
4774A0000-02
(D9893) 1 ACTUATOR (1) (2)
4775A0000-02
(D9893) 1 ACTUATOR (1) (2)
NOTE(S)
(1): The components listed above are not an AIRBUS Kit, the required parts must be
ordered as necessary through the given channel.
(2): The components listed above are only necessary if the SGRA has to be replaced. The
quantity of these items are to be ordered as required.
E. LIST OF EXISTING PARTS
No parts

### Page 11

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 11
3. ACCOMPLISHMENT INSTRUCTIONS
Task set A350-A-27-XX-P026-01000-93BA-A
Inspect the SGRA PNR and SN
WARNING: MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND THE CAUTIONS
INCLUDED IN THE REFERENCED PROCEDURES.
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 contains the instructions for the on-aircraft maintenance necessary
to ensure the continued airworthiness of the aircraft.
For any deviations to the instructions, including RC 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: 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.
A. TASK SET ASSOCIATED INFORMATION
Task Manpower
TOTAL MAN-HOURS 20.25 h

### Page 12

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 12
ELAPSED TIME (HOURS) 20.25 h
Additional man-hours related to Vendor SB; refer to:
LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB 4774A-27-01
LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB 4775A-27-01
B. PREPARATION
(1) Task A350-A-27-XX-P026-01001-540A-A - Job Set-up
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
523
623
Manpower/Resources/Skills
Man-hours 0.25 h
Minimum Number of person 1
Elapsed Time 0.25 h
Skills Utility
Referenced Information
Manuals/Drawings References/Sheets
INTRO A350-A-00-61-04-11ZZZ-018Z-D
MP A350-A-24-41-XX-00ZZZ-170Z-A
SD A350-A-06-3X-XX-01ZZZ-04CZ-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) For the identification of zones, refer to Ref. SD A350-A-06-3X-XX-01ZZZ-04CZ-A.
C. PROCEDURE
(1) Task A350-A-27-XX-P026-01001-311A-A - Inspect the SGRA PNR and SN
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
523
623
Manpower/Resources/Skills
Man-hours 8.00 h
Minimum Number of person 1
Elapsed Time 8.00 h
Skills Airframe

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A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 13
Referenced Information
Manuals/Drawings References/Sheets
MP A350-A-27-84-53-07ZZZ-520Z-A
VSB
LIEBHERR-AEROSPACE LINDENBERG (D9893)
VSB 4774A-27-01
LIEBHERR-AEROSPACE LINDENBERG (D9893)
VSB 4775A-27-01
Procedure
Ref. Fig. Inspection
Ref. Fig. Flow Chart
(a) Inspect the SGRA PNR and SN installed on aircraft.
NOTE: A review of the aircraft delivery and maintenance records is acceptable
for the SN identification in lieu of the inspection, provided that the
aircraft configuration and installed components can be conclusively
determined from that review.
1 Do the Job Set-up procedure as specified in the Removal of the Slat-Track
Rotary Actuator, refer to Ref. MP A350-A-27-84-53-07ZZZ-520Z-A.
2 Inspect the SGRA PNR and SN, refer to the list given in Ref. LIEBHERR-
AEROSPACE LINDENBERG (D9893) VSB 4774A-27-01 and Ref. LIEBHERR-
AEROSPACE LINDENBERG (D9893) VSB 4775A-27-01.
a If the SGRA PNR and SN are not listed:
<1> No further action in accordance with this Service Bulletin.
b If the SGRA PNR and SN are listed:
<1> Replace the affected SGRA, refer to Ref. T ask A350-A-27-XX-
P026-01ZZZ-920Z-A.
NOTE: The reference of this Service Bulletin will be added
by LIEBHERR to the identification plate of all units
in accordance with Ref. LIEBHERR-AEROSPACE
LINDENBERG (D9893) VSB 4774A-27-01 and Ref.
LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB
4775A-27-01.
<2> No further action in accordance with this Service Bulletin.

### Page 14

A350
SERVICE BULLETIN
Figure ICN-A350-A-27XXP026-A-FAPE3-04CWO-A-001-01 SHEET 1/3
REV 00 Nov 15/18 A350-27-P026Inspection
Page 14
CONF ALL
TRACK 5
TRACK 6
TRACK 7
TRACK 8
TRACK 9
FRONT SPAR
5027CW
5127CW
5029CW
5129CW
LH
RH
LH
RH
5035CW
5135CW
5033CW
5133CW
LH
RH
LH
RH
Z523
Z623
A
B
C
A
LH SHOWN
RH SYMMETRICAL
LH
RH
D
D
D
D
ICN-A350-A-27XXP026-A-FAPE3-04CWO-A-001-01

### Page 15

A350
SERVICE BULLETIN
Figure ICN-A350-A-27XXP026-A-FAPE3-04CWP-A-001-01 SHEET 2/3
REV 00 Nov 15/18 A350-27-P026Inspection
Page 15
CONF ALL
TRACK 13
TRACK 14
TRACK 15
TRACK 16
TRACK 17
FRONT SPAR
TRACK 9
TRACK 10
TRACK 11
TRACK 12
TRACK 13
FRONT SPAR
LH SHOWN
RH SYMMETRICAL
5039CW
5139CW
5041CW
5141CW
5043CW
5143CW
5045CW
5145CW
LH
RH
LH
RH
LH
RH
LH
RH
LH
RH
LH
RH
LH
RH
5049CW
5149CW
5051CW
5151CW
5055CW
5155CW
5058CW
5158CW
LH SHOWN
RH SYMMETRICAL
C
B
LH
RH
D
D
D
D
D
D
D
ICN-A350-A-27XXP026-A-FAPE3-04CWP-A-001-01

### Page 16

A350
SERVICE BULLETIN
Figure ICN-A350-A-27XXP026-A-FAPE3-04CWQ-A-001-01 SHEET 3/3
REV 00 Nov 15/18 A350-27-P026Inspection
Page 16
CONF ALL
EXAMPLE
D
E
GEARED ROTARY ACTUATOR
TYPE 1
MFR  D9893
SER  477XXXXXXXXXXXX
DMF  MMYYYY
PNR      477XXXXXX-XX
INSP.
AMDT.
LIEBHERR
5027CW
5127CW
5029CW
5033CW
5035CW
5135CW
5129CW
5133CW
5039CW
5041CW
5141CW
5043CW
5143CW
5045CW
5145CW
5049CW
5149CW
5051CW
5151CW
5055CW
5155CW
5058CW
5158CW
TO BE INSPECTED
IDENTIFICATION PLATE
LUBRICANT SEE MANUAL
XXX
5139CW
SERIAL NUMBER
E
TO BE INSPECTED
PART NUMBER
ICN-A350-A-27XXP026-A-FAPE3-04CWQ-A-001-01

### Page 17

A350
SERVICE BULLETIN
Figure ICN-A350-A-27XXP026-A-FAPE3-04CWS-A-002-01 SHEET 1/1
REV 00 Nov 15/18 A350-27-P026Flow Chart
Page 17
CONF ALL
NOTE:
THE PURPOSE OF FLOW CHARTS 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.
FOR THE COMPLIANCE TIMES, REFER TO THE
ACCOMPLISHMENT TIMESCALE PARA 1.E.(2).
REPLACE
THE SGRA
INSPECT
THE PNR AND SN ON THE
IDENTIFICATION PLATE
ARE THE
PNR AND SN
LISTED?
YESNO
NO FURTHER ACTION NECESSARY
IN ACCORDANCE WITH
THIS SERVICE BULLETIN
ICN-A350-A-27XXP026-A-FAPE3-04CWS-A-002-01

### Page 18

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 18
(2) Task A350-A-27-XX-P026-01001-920A-A - Replace the SGRA if necessary
Job Set-Up Information
Working Area
Impacted Zone Access / Work Location
523
623
Manpower/Resources/Skills
Man-hours
Minimum Number of person
Elapsed Time
Skills Airframe
Material necessary to do the job
Equipment
ITEM PART No. QTY (UM) KEYWORD DRAWING SEE NOTES
4774A0000-02 As req. ACTUATOR (1) (2)
4775A0000-02 As req. ACTUATOR (1) (2)
NOTE(S)
(1): The components listed above are not an AIRBUS Kit, the required parts must be
ordered as necessary through the given channel.
(2): The components listed above are only necessary if the SGRA has to be replaced. The
quantity of these items are to be ordered as required.
Referenced Information
Manuals/Drawings References/Sheets
MP A350-A-27-84-53-00ZZZ-720Z-AA350-A-27-84-53-07ZZZ-520Z-A
VSB
LIEBHERR-AEROSPACE LINDENBERG (D9893)
VSB 4774A-27-01
LIEBHERR-AEROSPACE LINDENBERG (D9893)
VSB 4775A-27-01
Procedure
(a) Remove and retain the SGRA, refer to Ref. MP A350-A-27-84-53-07ZZZ-520Z-A.
(b) Send the removed SGRA to Liebherr-Aerospace Lindenberg GmbH, refer to Ref.
LIEBHERR-AEROSPACE LINDENBERG (D9893) VSB 4774A-27-01 or Ref. LIEBHERR-
AEROSPACE LINDENBERG (D9893) VSB 4775A-27-01.
(c) Install, refer to Ref. MP A350-A-27-84-53-00ZZZ-720Z-A:
As required ACTUATOR-
ROTARY,SLAT
4774A0000-02  
or
As required ACTUATOR-
ROTARY,SLAT
4775A0000-02

### Page 19

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 19
D. PREPARATION FOR TEST
(1) Task A350-A-27-XX-P026-01003-320A-A - Prepare for Test
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 5.00 h
Minimum Number of person 1
Elapsed Time 5.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP A350-A-27-84-53-00ZZZ-720Z-A
Procedure
(a) Do the preparation for test, refer to Ref. MP A350-A-27-84-53-00ZZZ-720Z-A.
E. TEST
(1) Task A350-A-27-XX-P026-02002-320A-A - Operational Test
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 1.00 h
Minimum Number of person 1
Elapsed Time 1.00 h
Skills Airframe
Referenced Information
Manuals/Drawings References/Sheets
MP A350-A-27-84-XX-00ZZZ-320Z-A
Procedure
(a) Do the Operational T est of the Slat and Droop Nose System, refer to Ref. MP
A350-A-27-84-XX-00ZZZ-320Z-A.
F. CLOSE-UP
(1) Task A350-A-27-XX-P026-01001-740A-A - Close-up
Job Set-Up Information
Manpower/Resources/Skills
Man-hours 6.00 h
Minimum Number of person 1
Elapsed Time 6.00 h
Skills Utility
Referenced Information
Manuals/Drawings References/Sheets
MP A350-A-27-84-53-00ZZZ-720Z-A

### Page 20

A350
SERVICE BULLETIN
REV 00 Nov 15/18 A350-27-P026
Page 20
Procedure
(a) Make sure that the work areas are clean and clear of tools and other items of
equipment.
(b) Do the Close-up procedure as specified in the Installation of the Slat-Track Rotary
Actuator, refer to Ref. MP A350-A-27-84-53-00ZZZ-720Z-A.
(c) Put the aircraft back to its initial configuration.
G. ADMINISTRATIVE
(1) Task A350-A-27-XX-P026-01001-90AA-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 21

A350
SERVICE BULLETIN
APPENDIX
REV 00 Nov 15/18 A350-27-P026
Page 21
APPENDIX
A. REPORTING SHEET
TITLE: FLIGHT CONTROLS - INSPECTION/CHECK FOR POTENTIAL CRACKS ON
RAW MATERIAL OF SLAT GEARED ROTARY ACTUATOR (SGRA)
MODIFICATION No.:  
(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 22

A350
SERVICE BULLETIN
APPENDIX
REV 00 Nov 15/18 A350-27-P026
Page 22
B. 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 CUSTOMER SERVICES DIRECTORATE
Service Bulletins Management
1 Rond Point Maurice Bellonte
31707 BLAGNAC CEDEX
FRANCE
Fax: (+33) 5 61 93 42 51
Or via your Resident Customer Support Office.

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