# Airbus Mandatory Service Bulletin A340-27-4175

Copy: Revision 01 ("U.S. DOT/FAA - Service Bulletin - A340-27-4175 R01"), 38 pages: PDF https://openairdocs.org/files/sha256/33/e6/33e61337e5dcb8dd914a25c4667843850c5330c35843fbf8bc73f585e12feb85; text https://openairdocs.org/service-documents/airbus/a340-27-4175/file/33e61337e5dc.md. Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2013-0665; AD 2013-22-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Airbus](https://openairdocs.org/service-documents/airbus.md)
- Type: Service bulletin (Mandatory Service Bulletin)
- Number: A340-27-4175
- Latest revision known: A340-27-4175, Revision 01, dated June 13, 2013 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/airbus/a340-27-4175

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

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

- [AD 2013-22-02](https://openairdocs.org/ad/2013-22-02.md), effective Dec 5, 2013: Revision 01
- [AD 2013-16-11](https://openairdocs.org/ad/2013-16-11.md), effective Sep 27, 2013: No revision named

Also cited in [2 proposed ADs](https://openairdocs.org/service-documents/airbus/a340-27-4175/proposed.md).

## Text (38 pages)

Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2013-0665; AD 2013-22-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET
AIRBUS
CUSTOMER SERVICES DIRECTORATE
1 Rond Point Maurice Bellonte
31707 BLAGNAC CEDEX
FRANCE
T e l:( 3 3 )56 19 33 33 3
Telex : AIRBU 530526F
F a x:( 3 3 )56 19 34 25 1
MANDATORY
 MANDATORY
 MANDATORY
ATA SYSTEM: 27
TITLE: FLIGHT CONTROLS - TRIMMABLE HORIZONTAL STABILIZER
ACTUATOR - THSA SCREW SHAFT LOWER SPLINES INSPECTION
(P/N 47147-500 AND -700)
MODIFICATION No.: None
This page transmits Revision No.01 of Service Bulletin No.A340-27-4175
ADDITIONAL WORK
**CONF ALL
No additional work is required by this revision for aircraft modified by any previous issue.
REASON
Revision No. 01 issued to add reference to Service Bulletin No. A340-27-4187 for the final fix.
CHANGES
SUMMARY
REASON/DESCRIPTION/OPERATIONAL
CONSEQUENCES
REASON UPDATED
 R
EFFECTIVITY
 OPERATOR LIST UPDATED
 R
REFERENCES / REPERCUSSIONS
 REFERENCES/REPERCUSSIONS TABLE
UPDATED
R
PLANNING INFORMATION
EFFECTIVITY
 EFFECTIVITY RELATED INFORMATION
UPDATED
R
Configuration definition
CONF 001
 CONFIGURATION DEFINITION UPDATED
 R
REASON
Objective/Action
 OBJECTIVE/ACTION UPDATED
 R
COMPLIANCE
Accomplishment Timescale
 ACCOMPLISHMENT TIMESCALE UPDATED
 R
REFERENCES
 REFERENCED DOCUMENTATION UPDATED
 R
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 1
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 2

@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET
MATERIAL INFORMATION
INDUSTRY SUPPORT INFORMATION
 INDUSTRY SUPPORT INFORMATION UPDATED
 R
ACCOMPLISHMENT INSTRUCTIONS
TASK 274175- 832-801-001-Inspection
Subtask 274175-220-001-001
 SUBTASK SOLUTION UPDATED
REFERENCED DOCUMENTATION UPDATED
REFERENCES UPDATED
NOTE UPDATED
R
Fig. A-FFAAA
Fig. A-FFAAA Sheet 01
 SHEET UPDATED
 R
Appendix 01 - Inspection Report
Fig. A-FRAAA
Fig. A-FRAAA Sheet 01
 SHEET UPDATED
 R
FILLING INSTRUCTIONS
This Service Bulletin has been generated electronically and is reissued as a complete document.
Replace the complete document.
Put this Revision Transmittal Sheet in front of the Service Bulletin.
HISTORY OF PREVIOUS REVISIONS
No previous revision
REVISION SEQUENCE
ORIGINAL: Feb 14/12
REVISION No. : 01 - Jun 13/13
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 2
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 3

@A340
SERVICE BULLETIN
SUMMARY
AIRBUS
CUSTOMER SERVICES DIRECTORATE
1 Rond Point Maurice Bellonte
31707 BLAGNAC CEDEX
FRANCE
T e l:( 3 3 )56 19 33 33 3
Telex : AIRBU 530526F
F a x:( 3 3 )56 19 34 25 1
This summary is for information only and is not approved for modification of the aircraft.
MANDATORY
 MANDATORY
 MANDATORY
ATA SYSTEM: 27
TITLE: FLIGHT CONTROLS - TRIMMABLE HORIZONTAL STABILIZER
ACTUATOR - THSA SCREW SHAFT LOWER SPLINES INSPECTION
(P/N 47147-500 AND -700)
**CONF ALL
MODIFICATIONS
None
REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES
Some Trimmable Horizontal Stabilizer Actuators (THSA) PN 47147-500 have been found with corrosion
affecting the ballscrew lower splines (between the tie bar and the screwjack).
Investigations have identified the root cause for the corrosion :
- Contact/friction between the tie bar and the inner surface of the ballscrew leads to the removal of
Molykote (corrosion protection) in front of the tie bar splines,
- Humidity ingress initiates surface oxidation starting from surfaces where Molykote is removed,
- Water retention in lower part leads to corrosion spread out and apparition of a brown deposit (iron
oxide).
This Inspection Service Bulletin requires an inspection of ballscrew lower splines on all THSA PN
47147-500 older than 11 years since retrofit -400 (or -400 new).
This inspection impacts also the THSA PN 47147-700 as the introduction of the CSP does not change
the material of the ballscrew.
This Service Bulletin is published to advise operators of A340-200/300 aircraft of the issuance of
Goodrich Actuation Systems Service Bulletin No. 47147-27-18 which defines the acceptable corrosion
on the lower splines on the THSA screwjack.
Accomplishment of this Service Bulletin permits to detect corrosion and contributes to ensure the
reliable function of the THSA.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 1
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 4

@A340
SERVICE BULLETIN
SUMMARY
GENERAL EVALUATION
EVALUATION TABLE
COMPLIANCE
 MANDATORY (1)
 CANCELS INSPECTION SB
 NO
POTENTIAL AD
 YES
 A/C OPERATION AFFECTED
 NO
RELIABILITY AFFECTED
 NO
 PAX COMFORT AFFECTED
 NO
COST SAVING
 NO
 LROPS AFFECTED
 NO
STRUCTURAL LIFE EXTN
 NO
 VENDOR SB INVOLVED
 YES
NOTE
 (1)
: Service Bulletin must be accomplished.
MATERIAL PRICE INFORMATION
No Material
EFFECTIVITY
This Service Bulletin is applicable to this (these) operator(s) :
15R
 47W 56W 58X
 83V
 ABD
 ABQ
 ACA
 AFR AIB
 ALK ARG CAL
CCA CPA DGA DLH FIN GAF GFA HFY IBE IRC
 IRM
 KAC LAN
M3R MAU MDG
 MSR NMB PAL QAF RJA S3R SAA SAS SFB
 SLM
SVW SWR TAP THT THY UAE VCV VIR XAX
CONCURRENT REQUIREMENTS
None
REFERENCES / REPERCUSSIONS
TFU
 27.44.51.010
OEB
 None
AOT
 None
SIL
 None
LINE MAINTENANCE AFFECTED
 No
LIFE LIMIT
 None
OTHER
 OIT SE 999.0022/12
NATURE OF THE WORK
AIRCRAFT
 YES
EQUIPMENT
 NO
HARD
 NO
SOFT
 NO
OBRM
 NO
MANPOWER
Task 274175-832-801-001: Inspection
TOTAL MANHOURS
 4.00
ELAPSED TIME (HOURS)
 4.00
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 2
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 5

@A340
SERVICE BULLETIN
SUMMARY
Task 274175-832-801-001: Inspection
Additional manhours relat ed to Vendor SB; refer to:
Do a Detailed Inspection of the THSA Ballscrew
 Goodrich Actuation Systems Service
Bulletin No. 47147-27-18
Task 274175-833-801-001: Repair
TOTAL MANHOURS
 13.00
ELAPSED TIME (HOURS)
 9.00
APPENDICES
Appendix 01 - Inspection Report
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 3
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 6

@A340
SERVICE BULLETIN
SUMMARY
**CONF ALL
 − Z311 Z312
1CS
A
312AR
FR87
FR80
B
A
NOTE:
AREA TO BE INSPECTED01
01
B
F_SB_274175_5_SAAA_01_00
Figure A-F SAAA - S heet 01
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 4
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 7

@A340
SERVICE BULLETIN
AIRBUS
CUSTOMER SERVICES DIRECTORATE
1 Rond Point Maurice Bellonte
31707 BLAGNAC CEDEX
FRANCE
T e l:( 3 3 )56 19 33 33 3
Telex : AIRBU 530526F
F a x:( 3 3 )56 19 34 25 1
MANDATORY
 MANDATORY
 MANDATORY
ATA SYSTEM: 27
TITLE: FLIGHT CONTROLS - TRIMMABLE HORIZONTAL STABILIZER
ACTUATOR - THSA SCREW SHAFT LOWER SPLINES INSPECTION
(P/N 47147-500 AND -700)
MODIFICATION No.: None
This document contains AIRBUS PROPRIETARY INFORMATION and shall at all times remain the
property of AIRBUS; no intellectual property right or licence is granted by AIRBUS in connection with
any information contained in it. It is delivered on the express condition that said document and the
information contained in it shall be treated as confidential, shall not be used for any purpose other than
that for which it is hereby delivered. It shall not be disclosed in whole or in part to third parties and shall
not be duplicated in any manner (except for the purposes of performing the tasks described hereunder
and provided that any recipient of such document shall comply with the conditions herein), without
AIRBUS prior written consent.
1. PLANNING INFORMATION
**CONF ALL
A. EFFECTIVITY
(1) Models
340-211 340-212 340-213 340-311 340-312 340-313
(2) Effectivity by MSN
0002
 0004-0006
 0009 0011 0013-0014
 0018-0020
 0022-0029
 0031-0035 0038 0041
0043-0044 0046-0049 0051-0053 0056-0058 0061 0063 0074-0076 0078-0081
0084-0085 0088-0091 0093-0094 0101 0104 0114-0115 0117 0123 0125-0126 0128
0131 0133-0137 0139 0141-0142 0145-0147 0149-0152 0154 0156-0161 0163-0164
0166-0170 0173-0176 0178-0180 0182 0185-0187 0190 0192-0194 0196-0197 0199
0201-0202 0204 0207-0208 0210 0212-0218 0220-0221 0225 0227-0228 0233
0235-0237 0242-0243 0245-0246 0252 0257 0260 0263-0264 0268 0270 0273-0274
0278 0280 0282 0292 0297 0302 0304 0307 0310 0318-0319 0321 0325 0327 0329
0331-0332 0335 0347 0352 0354-0355 0359 0363 0367 0373-0374 0377-0379 0381
0385 0387 0390 0395 0399 0402 0406 0411 0413-0415 0424 0429-0430 0433-0435
0438 0442 0446-0447 0450 0459 0467 0470 0474 0483 0528 0538 0541 0544-0546
0554 0556 0559 0561-0562 0582 0585 0590 0598 0643 0646 0651 0668 0793 0800
0835 0844 0921 0938 0955
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 1
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 8

@A340
SERVICE BULLETIN
(3) Effectivity by Operator
The Operator/MSN relationship is provided for information only and is correct at the time
of issue in accordance with the information available to AIRBUS. Any future changes
resulting from transfer of an aircraft from one operator to another will not be reflected in
this list unless the Service Bulletin is revised for another reason.
OPERATOR
 MSN
15R
 0151
47W
 0009
56W
 0011
 0013 0018
 0019
58X
 0004
83V
 0235
 0280
 0292
ABD
 0210
ABQ
 0216
 0257
ACA
 0170
AFR
 0029 0078 0084 0186 0207 0237 0245 0246 0260 0307 0310 0377
0399
AIB
 0131
 0141
 0161
 0182
 0302
 0318
 0332
ALK
 0032 0033 0034 0367 0374 0381
ARG
 0048 0063 0074 0080 0085 0093 0094 0123 0126 0128 0373
CAL
 0402 0406 0411 0415 0433 0541
CCA
 0192 0199 0201 0242 0243 0264
CPA
 0136 0137 0142 0147 0157 0160 0208 0218 0220 0227 0228
DGA
 0075 0081
DLH
 0024 0027 0028 0035 0052 0053 0135 0158 0213 0233 0252 0297
0304 0321 0325 0327 0335 0347 0352 0354 0379 0390 0434 0447
FIN
 0058 0168 0174 0835 0844 0921 0938
GAF
 0274 0355
GFA
 0212 0215 0282 0554
HFY
 0117 0133 0190
 0202
IBE
 0005 0088 0125 0134 0145 0146 0193 0217 0221 0329 0387 0414
0459 0474 0483
IRC
 0002
IRM
 0020
 0056
KAC
 0089 0090 0101 0104
LAN
 0167 0359 0363 0429 0442
M3R
 0061
MAU
 0076 0152 0194 0268 0793 0800
MDG
 0319
MSR
 0156 0159 0178
NMB
 0047 0051
PAL
 0173 0176 0187 0196
QAF
 0026 0528
RJA
 0014 0022 0038 0043
S3R
 0204
SAA
 0006 0197 0378 0544 0582 0590 0643 0646 0651
SAS
 0413 0424 0430 0435 0450 0467 0470
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 2
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 9

@A340
SERVICE BULLETIN
OPERATOR
 MSN
SFB
 0046
SLM
 0049
SVW
 0955
SWR
 0150 0154 0169 0175 0179 0263 0538 0545 0546 0556 0559 0561
0562 0585 0598
TAP
 0041 0044 0079 0091
THT
 0385 0395 0438 0446 0668
THY
 0023 0025 0057 0115 0180 0270 0331
UAE
 0139 0149 0163 0166 0185 0236
VCV
 0031
VIR
 0114 0164 0214 0225
XAX
 0273 0278
(4) Configuration by MSN
MSN
 CONFIGURATION
0002 0004 0005 0006 0009 0011 0013 0014 0018 0019 0020
0022 0023 0024 0025 0026 0027 0028 0029 0031 0032 0033
0034 0035 0038 0041 0043 0044 0046 0047 0048 0049 0051
0052 0053 0056 0057 0058 0061 0063 0074 0075 0076 0078
0079 0080 0081 0084 0085 0088 0089 0090 0091 0093 0094
0101 0104 0114 0115 0117 0123 0125 0126 0128 0131 0133
0134 0135 0136 0137 0139 0141 0142 0145 0146 0147 0149
0150 0151 0152 0154 0156 0157 0158 0159 0160 0161 0163
0164 0166 0167 0168 0169 0170 0173 0174 0175 0176 0178
0179 0180 0182 0185 0186 0187 0190 0192 0193 0194 0196
0197 0199 0201 0202 0204 0207 0208 0210 0212 0213 0214
0215 0216 0217 0218 0220 0221 0225 0227 0228 0233 0235
0236 0237 0242 0243 0245 0246 0252 0257 0260 0263 0264
0268 0270 0273 0274 0278 0280 0282 0292 0297 0302 0304
0307 0310 0318 0319 0321 0325 0327 0329 0331 0332 0335
0347 0352 0354 0355 0359 0363 0367 0373 0374 0377 0378
0379 0381 0385 0387 0390 0395 0399 0402 0406 0411 0413
0414 0415 0424 0429 0430 0433 0434 0435 0438 0442 0446
0447 0450 0459 0467 0470 0474 0483 0528 0538 0541 0544
0545 0546 0554 0556 0559 0561 0562 0582 0585 0590 0598
0643 0646 0651 0668 0793 0800 0835 0844 0921 0938 0955
001
(5) Configuration definition
**CONF 001
Config. 001 is valid for all the aircraft given in the effectivity of this Service Bulletin as a
standard configuration.
(6) Material Effectivity
MATERIAL
 QTY PER A/C
 SEE NOTES
Consumable CMLA01
 1
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 3
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 10

@A340
SERVICE BULLETIN
B. CONCURRENT REQUIREMENTS
None
C. REASON
(1) History
Some Trimmable Horizontal Stabilizer Actuators (THSA) PN 47147-500 have been found
with corrosion affecting the ballscrew lower splines (between the tie bar and the
screwjack).
Investigations have identified the root cause for the corrosion :
- Contact/friction between the tie bar and the inner surface of the ballscrew leads to
the removal of Molykote (corrosion protection) in front of the tie bar splines,
- Humidity ingress initiates surface oxidation starting from surfaces where Molykote is
removed,
- Water retention in lower part leads to corrosion spread out and apparition of a
brown deposit (iron oxide).
(2) Objective/Action
This Inspection Service Bulletin requires an inspection of ballscrew lower splines on all
THSA PN 47147-500 older than 11 years since retrofit -400 (or -400 new).
This inspection impacts also the THSA PN 47147-700 as the introduction of the CSP
does not change the material of the ballscrew.
This Service Bulletin is published to advise operators of A340-200/300 aircraft of the
issuance of Goodrich Actuation Systems Service Bulletin No. 47147-27-18 which defines
the acceptable corrosion on the lower splines on the THSA screwjack.
(3) Advantages
Accomplishment of this Service Bulletin permits to detect corrosion and contributes to
ensure the reliable function of the THSA.
(4) Operational/Maintenance Consequences
None
D. DESCRIPTION
To accomplish this Service Bulletin it is necessary to :
Task 274175-832-801-001: Inspection
(1) Do a Detailed Inspection of the THSA Ballscrew
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 4
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 11

@A340
SERVICE BULLETIN
Task 274175-833-801-001: Repair
(1) Replace the Trimmable Horizontal Stabilizer Actuator (THSA)
E. COMPLIANCE
(1) Classification
MANDATORY: Service Bulletin must be accomplished.
(2) Accomplishment Timescale
CONDITION
 ACTION
 COMPLIANCE TIME
 REPETITIVE INTERVAL
For THSA which PN are
not 47147-500 and
47147-700
No further action *
 None
 None
For THSA which PN are
47147-500 or
47147-700 having
accumulated less than
11 years since retrofit
into PN 47147-400 or
(-400 new) at Service
Bulletin issuance
Do SUBTASK
274175-220-001 001 Do
a Detailed Inspection of
the THSA Ballscrew
Within 24 months after
the THSA has
accumulated 11 years
(since retrofit into -400
or -400 new)
None
For THSA which PN are
47147-500 or
47147-700 having
accumulated more than
11 years since retrofit
into PN 47147-400 or
(-400 new) at Service
Bulletin issuance
Do SUBTASK
274175-220-001 001 Do
a Detailed Inspection of
the THSA Ballscrew
Before reaching 13
years (since retrofit into
-400 or -400 new) or
within 3 months from
ISB issuance whichever
occurs later
None
THSA classified TYPE 1
 None
 None
 Repeat this inspection
every 24 months
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 5
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 12

@A340
SERVICE BULLETIN
CONDITION
 ACTION
 COMPLIANCE TIME
 REPETITIVE INTERVAL
If THSA is replaced by
PN 47147-500 or
47147-700 (classified
type 1):
Repeat this inspection
at the first convenient
maintenance opportunity
which occurs after the
THSA have
accumulated 11 years
since retrofit into PN
47147-400 (or -400
new) but no later than
13 years since retrofit
into PN 47147-400 (or
-400 new) or within 3
months after SB
issuance whichever
occurs later.
If replacement THSA is
PN 47147-500 or
47147-700 (not
classified type 1):
Replace the THSA
before next flight
THSA classified TYPE 2
and
Ballscrew integrity test
is OK
Replace the THSA, refer
to TASK
274175-833-801 001
Repair
Before 24 months or
4,400 FC whichever
occurs first from initial
inspection
If THSA is not replaced
by PN 47147-500 or
47147-700:
None *
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 6
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 13

@A340
SERVICE BULLETIN
CONDITION
 ACTION
 COMPLIANCE TIME
 REPETITIVE INTERVAL
If THSA is replaced by
PN 47147-500 or
47147-700 (classified
type 1):
Repeat this inspection
at the first convenient
maintenance opportunity
which occurs after the
THSA have
accumulated 11 years
since retrofit into PN
47147-400 (or -400
new) but no later than
13 years since retrofit
into PN 47147-400 (or
-400 new) or within 3
months after SB
issuance whichever
occurs later.
If replacement THSA is
PN 47147-500 or
47147-700 (not
classified type 1):
Replace the THSA
before next flight
THSA classified TYPE 2
and
Ballscrew integrity test
is not OK
Replace the THSA, refer
to TASK
274175-833-801 001
Repair
Before next flight
If THSA is not replaced
by PN 47147-500 or
47147-700:
None *
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 7
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 14

@A340
SERVICE BULLETIN
CONDITION
 ACTION
 COMPLIANCE TIME
 REPETITIVE INTERVAL
If THSA is replaced by
PN 47147-500 or
47147-700 (classified
type 1):
Repeat this inspection
at the first convenient
maintenance opportunity
which occurs after the
THSA have
accumulated 11 years
since retrofit into PN
47147-400 (or -400
new) but no later than
13 years since retrofit
into PN 47147-400 (or
-400 new) or within 3
months after SB
issuance whichever
occurs later.
If replacement THSA is
PN 47147-500 or
47147-700 (not
classified type 1):
Replace the THSA
before next flight
THSA classified TYPE 3
and
Ballscrew integrity test
is OK
Replace the THSA, refer
to TASK
274175-833-801 001
Repair
Before 10 days
If THSA is not replaced
by PN 47147-500 or
47147-700:
None *
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 8
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 15

@A340
SERVICE BULLETIN
CONDITION
 ACTION
 COMPLIANCE TIME
 REPETITIVE INTERVAL
If THSA is replaced by
PN 47147-500 or
47147-700 (classified
type 1):
Repeat this inspection
at the first convenient
maintenance opportunity
which occurs after the
THSA have
accumulated 11 years
since retrofit into PN
47147-400 (or -400
new) but no later than
13 years since retrofit
into PN 47147-400 (or
-400 new) or within 3
months after SB
issuance whichever
occurs later.
If replacement THSA is
PN 47147-500 or
47147-700 (not
classified type 1):
Replace the THSA
before next flight
THSA classified TYPE 3
and
Ballscrew integrity test
is not OK
Replace the THSA, refer
to TASK
274175-833-801 001
Repair
Before next flight
If THSA is not replaced
by PN 47147-500 or
47147-700:
None *
NOTE *: In case MOD 49590 (introduction of the PN
 47172-300 from 47172-200) is not yet recorded
as applied on the A/C, record application of MOD 200238 through Service Bulletin No. A340-27-4178
or in case the MOD 58916 (introduction of the PN 47172-530 from PN 47172-510) is not yet recorded
as applied on the A/C, record application of MOD 202802 through Service Bulletin No. A340-27-4187.
Detailed Inspection of the THSA Ballscrew
This Service Bulletin has been classified Mandatory. It is expected that an Airworthiness
Directive (AD) published by the European Av iation Safety Agenc y (EASA) will be issued
to confirm this classification. It is anticipated that the AD will confirm the (thresholds
and/or intervals and/or date) given above 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 Approv al No. EASA. 21J.031.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 9
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SERVICE BULLETIN
If an aircraft listed in the effectivity 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
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.
Task 274175-832-801-001: Inspection
Get Access
 2.00
Close-Up
 2.00
TOTAL MANHOURS
 4.00
ELAPSED TIME (HOURS)
 4.00
Additional manhours relat ed to Vendor SB; refer to:
Do a Detailed Inspection of the THSA Ballscrew
 Goodrich Actuation Systems Service
Bulletin No. 47147-27-18
Task 274175-833-801-001: Repair
Get Access
 2.00
On Aircraft
Replace the Trimmable Horizontal Stabilizer Actuator
(THSA)
8.00
Tests
 1.00
Close-Up
 2.00
TOTAL MANHOURS
 13.00
ELAPSED TIME (HOURS)
 9.00
H. WEIGHT AND BALANCE
Not Changed
I. ELECTRICAL LOAD DATA
Not Changed
J. REFERENCES
Aircraft Maintenance Manual (AMM)
 06-20-00 06-41-53 12-34-24
27-44-51
Elec. Std. Practices Manual (ESPM)
 20-55-00
Service Bulletin (SB)
 A340-27-4178
A340-27-4187
Vendor Service B ulletin (VSB)
 Goodrich Actuation Systems
Service Bulletin No. 47147-27-18
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 10
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SERVICE BULLETIN
K. PUBLICATION AFFECTED
Impact on scheduled maintenance: Refer to Maintenance Planning Document (MPD)
L. INTERCHANGEABILITY/MIXABILITY
Not Applicable
M. SPARES
Actuator-THS 47147-500
Actuator-THS 47147-700
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 11
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This Page Intentionally Left Blank
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 12
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SERVICE BULLETIN
2. MATERIAL INFORMATION
**CONF ALL
A. MATERIAL - PRICE AND AVAILABILITY
(1) Procurement Addresses
Vendor parts are to be procured from:
Goodrich Actuation Systems
13 avenue de l’Eguillette Saint-Ouen l’Aumone
95056 Cergy Pontoise
CEDEX France
(2) Price and Availability
No Airbus kit will be provided.
Procurement terms for the equipment must be negotiated with the equipment supplier.
B. INDUSTRY SUPPORT INFORMATION
Refer to the Goodrich Actuation Systems Service Bulletin No. 47147-27-18 for the industry
support terms of the Vendor Service Bulletin parts and labor.
C. LIST OF COMPONENTS
No Kit
D. LIST OF MATERIALS - OPERATOR SUPPLIED
(1) Consumable Materials
NOTE
: To accomplish this Service Bulletin it is necessary to use the
expendable parts listed in AMM Task 27-44-51-400-805 and AMM Task
27-44-51-400-801.
Consumable CMLA01
ITEM
 DESCRIPTION
 REFERENCE TO CML
MAT. No.
QTY PER A/C
 SEE
NOTES
Solvent General Purpose
 11-026
 As required
(2) Components
None
(3) Equipment
None
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 13
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SERVICE BULLETIN
E. PARTS TO BE RE-IDENTIFIED BY OPERATOR
None
F. TOOLING
(1) Tooling - Price and Availability
None
(2) Tools
NOTE
: To accomplish this Service Bulletin it is necessary to use the tools listed
in AMM Task 27-44-51-220-801 and AMM Task 27-44-51-400-801.
(3) Special Tools
None
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 14
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3. ACCOMPLISHMENT INSTRUCTIONS
Task 274175-832-801-001 - Inspection
WARNING
: MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND ALL 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 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.
IN CASE OF CONTAMINATION REFER TO ESPM 20-55-00.
Task Associated Data
Zone
From 311 to 312
Access
Door
 312AR
Manpower
TOTAL MANHOURS
 4.00
ELAPSED TIME (HOURS)
 4.00
Additional manhours related to Vendor SB; refer to:
Goodrich Actuation Systems Service Bulletin No. 47147-27-18
A. GENERAL
(1) Subtask 274175-910-001-001 - Standard Practices
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 06-20-00, Page Block 001
06-41-53, Page Block 001
(a) For the identification of zones (Refer to AMM 06-20-00, Page Block 001).
(b) For the identification of access panels (Refer to AMM 06-41-53, Page Block 001).
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 15
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(c) Tag the parts that you must remove and retain to make the subsequent installation
easier.
(d) Put all the retained hardware in identified plastic bags and attach the bags to the
related unit.
(2) Subtask 274175-839-001-001 - Administrative
Manpower Resources
Skills
 NON SPECIFIC
Write in the applicable aircraft records that you have done all the work given in this
Service Bulletin.
B. PREPARATION
(1) Subtask 274175-941-001-001 - Job Set-up
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 12-34-24-860-802
(a) Make sure that the aircraft is electrically grounded (Refer to AMM Task
12-34-24-860-802).
(b) Put the access platforms in position at the passenger/crew door and Zone 312.
(c) Open the passenger/crew door(s).
(d) Open the access door 312AR.
(e) Put the warning notices in position on the hydraulic controls to tell persons not to
operate the hydraulic systems.
(2) Subtask 274175-010-001-001 - Remove for Access the Lower Claw Stop
Manpower Resources
Skills
 AIRFRAME
References
Aircraft Maintenance Manual (AMM)
 Task 27-44-51-000-805
(a) Remove the lower claw stop (Refer to AMM Task 27-44-51-000-805).
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 16
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SERVICE BULLETIN
C. PROCEDURE
(1) Subtask 274175-220-001-001 - Do a Detailed Inspection of the THSA Ballscrew
Work Zones and Access Panels
Zone
 Access/Work location
From
 311
To
 312
 Access
 Door 312AR
References
Aircraft Maintenance Manual (AMM)
 Task 27-44-51-220-801
Service Bulletin (SB)
 A340-27-4178
A340-27-4187
Vendor Service B ulletin (VSB)
 Goodrich Actuation Systems 47147-27-18
Fig. A-FBAAA
Inspection Area
Sheet 01
Fig. A-FFAAA
Flow Chart
Sheet 01
At the threshold given in the Planning Information Paragraph E.(2) :
(a) For THSA which PN are not 47147-500 and 47147-700:
No further action.
NOTE
: In case MOD 49590 (introduction of the PN 47172-300 from
47172-200) is not yet recorded as applied on the A/C,
record application of MOD 200238 through Service Bulletin No.
A340-27-4178 or in case the MOD 58916 (introduction of the PN
47172-530 from PN 47172-510) is not yet recorded as applied on
the A/C, record application of MOD 202802 through Service Bulletin
No. A340-27-4187
 .
(b) For THSA which PN are 47147-500 or 47147-700:
Do a detailed inspection of the THSA ballscrew in accordance with Goodrich
Actuation Systems Service Bulletin No. 47147-27-18.
1
 If THSA is classified Type 1 (no corrosion) :
a
 Send Appendix 01 - Inspection Report .
b
 Repeat this inspection every 24 months.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 17
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SERVICE BULLETIN
2
 If THSA is classified Type 2 (local traces of corrosion) after cleaning :
a
 Do a ballscrew integrity test in accordance with AMM Task
27-44-51-220-801.
<1> If the test is correct :
<a> Before 24 months or 4,400FC whichever occurs first from
initial inspection, replace the THSA FIN 1CS, refer to TASK
274175-833-801 001 Repair .
[1] If THSA is replaced by PN 47147-500 or 47147-700
(classified type 1):
Repeat this inspection at the first convenient maintenance
opportunity which occurs after the THSA have
accumulated 11 years since retrofit into PN 47147-400 (or
-400 new) but no later than 13 years since retrofit into PN
47147-400 (or -400 new) or within 3 months after SB
issuance whichever occurs later.
[2] If replacement THSA is PN 47147-500 or 47147-700 (not
classified type 1):
Replace the THSA before next flight.
[3] If THSA is not replaced by PN 47147-500 and 47147-700:
No further action.
NOTE
: In case MOD 49590 (introduction of the
PN
 47172-300 from 47172-200) is not
yet recorded as applied on the A/C,
record application of MOD 200238 through
Service Bulletin No. A340-27-4178 or in
case the MOD 58916 (introduction of the
PN 47172-530 from PN 47172-510) is
not yet recorded as applied on the A/C,
record application of MOD 202802 through
Service Bulletin No. A340-27-4187.
<b> Send the Appendix 01 - Inspection Report .
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 18
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SERVICE BULLETIN
<2> If the test is not correct :
<a> Before next flight, replace the THSA FIN 1CS, refer to TASK
274175-833-801 001 Repair .
[1] If THSA is replaced by PN 47147-500 or 47147-700
(classified type 1):
Repeat this inspection at the first convenient maintenance
opportunity which occurs after the THSA have
accumulated 11 years since retrofit into PN 47147-400 (or
-400 new) but no later than 13 years since retrofit into PN
47147-400 (or -400 new) or within 3 months after SB
issuance whichever occurs later.
[2] If replacement THSA is replaced by PN 47147-500 or
47147-700 (not classified type 1):
Replace the THSA before next flight.
[3] If THSA is not replaced by PN 47147-500 and 47147-700:
No further action.
NOTE
: In case MOD 49590 (introduction of the
PN
 47172-300 from 47172-200) is not
yet recorded as applied on the A/C,
record application of MOD 200238 through
Service Bulletin No. A340-27-4178 or in
case the MOD 58916 (introduction of the
PN 47172-530 from PN 47172-510) is
not yet recorded as applied on the A/C,
record application of MOD 202802 through
Service Bulletin No. A340-27-4187.
<b> Send the Appendix 01 - Inspection Report .
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 19
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SERVICE BULLETIN
3
 If THSA is classified Type 3 (significant corrosion) :
a
 Do a ballscrew integrity test in accordance with AMM Task
27-44-51-220-801.
<1> If the test is correct :
<a> Before 10 days, replace the THSA FIN 1CS, refer to TASK
274175-833-801 001 Repair .
[1] If THSA is replaced by PN 47147-500 or 47147-700
(classified type 1):
Repeat this inspection at the first convenient maintenance
opportunity which occurs after the THSA have
accumulated 11 years since retrofit into PN 47147-400 (or
-400 new) but no later than 13 years since retrofit into PN
47147-400 (or -400 new) or within 3 months after SB
issuance whichever occurs later.
[2] If replacement THSA is PN 47147-500 or 47147-700 (not
classified type 1):
Replace the THSA before next flight.
[3] If THSA is not replaced by PN 47147-500 and 47147-700:
No further action.
NOTE
: In case MOD 49590 (introduction of the
PN
 47172-300 from 47172-200) is not
yet recorded as applied on the A/C,
record application of MOD 200238 through
Service Bulletin No. A340-27-4178 or in
case the MOD 58916 (introduction of the
PN 47172-530 from PN 47172-510) is
not yet recorded as applied on the A/C,
record application of MOD 202802 through
Service Bulletin No. A340-27-4187.
<b> Send the Appendix 01 - Inspection Report .
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 20
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<2> If the test is not correct :
<a> Before next flight, replace the THSA FIN 1CS, refer to TASK
274175-833-801 001 Repair .
[1] If THSA is replaced by PN 47147-500 or 47147-700
(classified type 1):
Repeat this inspection at the first convenient maintenance
opportunity which occurs after the THSA have
accumulated 11 years since retrofit into PN 47147-400 (or
-400 new) but no later than 13 years since retrofit into PN
47147-400 (or -400 new) or within 3 months after SB
issuance whichever occurs later.
[2] If replacement THSA is PN 47147-500 or 47147-700 (not
classified type 1):
Replace the THSA before next flight.
[3] If THSA is not replaced by PN 47147-500 and 47147-700:
No further action.
NOTE
: In case MOD 49590 (introduction of the
PN
 47172-300 from 47172-200) is not
yet recorded as applied on the A/C,
record application of MOD 200238 through
Service Bulletin No. A340-27-4178 or in
case the MOD 58916 (introduction of the
PN 47172-530 from PN 47172-510) is
not yet recorded as applied on the A/C,
record application of MOD 202802 through
Service Bulletin No. A340-27-4187.
<b> Send the Appendix 01 - Inspection Report .
D. TEST
None
E. CLOSE-UP
(1) Subtask 274175-410-001-001 - Install the Lower Claw Stop
Manpower Resources
Skills
 AIRFRAME
References
Aircraft Maintenance Manual (AMM)
 Task 27-44-51-400-805
(a) Install the lower claw stop (Refer to AMM Task 27-44-51-400-805).
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 21
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SERVICE BULLETIN
(2) Subtask 274175-942-001-001 - Close-up
Manpower Resources
Skills
 NON SPECIFIC
(a) Make sure that the work area is clean and clear of tools and other items.
(b) Close the access panel 312AR.
(c) Remove the WARNING NOTICE(S).
(d) Close the passenger/crew door(s).
(e) Remove the access platforms.
(f) Restore the systems and the air craft to normal operating condition.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 22
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Task 274175-833-801-001 - Repair
WARNING
: MAKE SURE THAT YOU OBEY ALL THE WARNINGS AND ALL 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 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.
IN CASE OF CONTAMINATION REFER TO ESPM 20-55-00.
Task Associated Data
Zone
From 311 to 312
Modified FIN
1CS
Access
Door
 312AR
Manpower
TOTAL MANHOURS
 13.00
ELAPSED TIME (HOURS)
 9.00
A. GENERAL
(1) Subtask 274175-910-002-001 - Standard Practices
Manpower Resources
Skills
 NON SPECIFIC
Material necessary to do the job
Consumable CMLA01
ITEM
 DESCRIPTION
 REFERENCE TO
CML MAT. No.
QTY PER A/C
 SEE
NOTES
Solvent General Purpose
 11-026
 As required
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 23
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References
Aircraft Maintenance Manual (AMM)
 06-20-00, Page Block 001
06-41-53, Page Block 001
(a) For the identification of zones (Refer to AMM 06-20-00, Page Block 001).
(b) For the identification of access panels (Refer to AMM 06-41-53, Page Block 001).
(c) Tag the parts that you must remove and retain to make the subsequent installation
easier.
(d) Put all the retained hardware in identified plastic bags and attach the bags to the
related unit.
(e) Put blanking caps on the disconnected electrical connectors.
(f) Clean the area with :
Solvent General
Purpose
11-026 As required
(2) Subtask 274175-839-002-001 - Administrative
Manpower Resources
Skills
 NON SPECIFIC
Write in the applicable aircraft records that you have done all the work given in this
Service Bulletin.
B. PREPARATION
(1) Subtask 274175-941-002-001 - Job Set-up
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 12-34-24-860-802
Task 27-44-51-000-801
(a) Make sure that the aircraft is electrically grounded (Refer to AMM Task
12-34-24-860-802).
(b) Put the access platforms in position at the passenger/crew door and Zone 312.
(c) Open the passenger/crew door(s).
(d) Open the access door 312AR.
(e) Put the warning notices in position on the hydraulic controls to tell persons not to
operate the hydraulic systems.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 24
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(f) Do the job set-up procedure as specified in the removal of the Trimmable
Horizontal Stabilizer Actuator (THSA) (Refer to AMM Task 27-44-51-000-801).
C. PROCEDURE
(1) Subtask 274175-960-001-001 - Replace the Trimmable Horizontal Stabilizer
Actuator (THSA)
Work Zones and Access Panels
Zone
 Access/Work location
From
 311
To
 312
 Access
 Door 312AR
Manpower Resources
Manhours
 8.00
Minimum number of person
 2
Subtask elapsed time
 4.00
Skills
 AIRFRAME
References
Aircraft Maintenance Manual (AMM)
 Task 27-44-51-000-801
Task 27-44-51-400-801
(a) Remove the THSA, FIN 1CS (Refer to AMM Task 27-44-51-000-801).
1 Actuator-THS 47147-500
or
1 Actuator-THS 47147-700
(b) Install the new THSA, FIN 1CS (Refer to AMM Task 27-44-51-400-801).
D. TEST
(1) Subtask 274175-720-001-001 - Test
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 27-44-51-400-801
(a) Job Set-up :
1
 Remove the Safety clips and tags and close the circuit breakers as
specified after the installation of the THS Actuator (Refer to AMM Task
27-44-51-400-801).
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 25
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(b) Procedure :
1
 Do the test procedure as specified after the installation of the THS Actuator
(Refer to AMM Task 27-44-51-400-801).
E. CLOSE-UP
(1) Subtask 274175-942-002-001 - Close-up
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 27-44-51-400-801
(a) Do the close-up procedure as specified in the installation of the THSA (Refer to
AMM Task 27-44-51-400-801).
(b) Make sure that the work area is clean and clear of tools and other items.
(c) Close the access panel 312AR.
(d) Remove the WARNING NOTICE(S).
(e) Close the passenger/crew door(s).
(f) Remove the access platforms.
(g) Restore the systems and the aircraft to normal operating condition.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 26
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**CONF ALL
 − Z311 Z312
1CS
A
312AR
FR87
FR80
B
A
NOTE:
AREA TO BE INSPECTED01
01
B
F_SB_274175_5_BAAA_01_00
Figure A-F BAAA - S heet 01
Inspection Area
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 27
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**CONF ALL
AT THE THRESHOLD GIVEN IN THE PLANNING INFORMATION PARAGRAPH E.(2).
REFER TO SUBTASK 274175−220−001−001.
DO A DETAILED INSPECTION OF THE TRIMMABLE HORIZONTAL
STABILIZER ACTUATOR (THSA) FIN 1CS BALLSCREW
TEST OK NO YES
OR
THSA CLASSIFIED TYPE 2
(LOCAL TRACES OF
THSA CLASSIFIED TYPE 1
(NO CORROSION)
SEND THE INSPECTION
REPORT TO AIRBUS
THSA CLASSIFIED TYPE 3
(SIGNIFICANT CORROSION)
DO A BALLSCREW 
INTEGRITY TEST
REFER TO AMM TASK
27−44−51−220−801
TEST OKYES
NO FURTHER ACTION
REPEAT EVERY
24 MONTHS
DO A BALLSCREW 
INTEGRITY TEST
REFER TO AMM TASK
27−44−51−220−801
CORROSION)
QUESTION
ACTION
FINDING
BEFORE 10 DAYS
REPLACE THE THSA
BEFORE NEXT
FLIGHT
BEFORE 24 MONTHS
OR 4,400 FC
REPLACE THE THSA REPLACE THE THSA
REFER TO TASK
274175−833−801−001
REFER TO TASK
274175−833−801−001
REFER TO TASK
274175−833−801−001
GAPS BETWEEN SCREW SHAFT AND TIE ROD TEETH
REFER TO GOODRICH ACTUATION SYSTEMS SB No. 47147−27−18
DO A DETAILED INSPECTION OF THE PN 47147−500 OR PN 47147−700
47147−500 OR
THSA PN
47147−700
NOYES
SEND THE INSPECTION
REPORT TO AIRBUS
THSA PN 47147−500 OR
REPLACED BY
47147−700
NO YES
NO FURTHER ACTION
CLASSIFIED TYPE 1
THSA
(NO CORROSION) NOYES
REPLACE THE THSA
BEFORE NEXT FLIGHT
01
01
NOTE:
IN CASE MOD 49590 (INTRODUCTION OF THE PN 47172−300 FROM 47172−200) IS NOT YET RECORDED AS APPLIED ON THE A/C, RECORD APPLICATION OF MOD 200238 THROUGH SB 27−4178 OR IN01
CASE THE MOD 58916 (INTRODUCTION OF THE PN 47172−530 FROM PN 47172−510) IS NOT YET RECORDED AS APPLIED ON THE A/C, RECORD APPLICATION OF MOD 202802 THROUGH SB 27−4187. F_SB_274175_5_FAAA_01_09
Figure A-FFAAA - Sheet 01
Flow Chart
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 28
5
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### Page 35

@A340
SERVICE BULLETIN
Appendix 01 - Inspection Report
**CONF ALL
(1) Inspection Report
The results of the inspection, including no findings, replacement or action to be done, must be
forwarded to Airbus departm ent SEEL6, on th e attached inspec tion report sheet.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 1
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 36

@A340
SERVICE BULLETIN
Appendix 01 - Inspection Report
**CONF ALL
INSPECTION REPORT
SERVICE BULLETIN No. :
A/C MSN :
FLIGHT CYCLES :
FLIGHT HOURS :
A340−27−4175
DATE OF INSPECTION :
RETURN TO :
AIRBUS
CUSTOMER SERVICES ENGINEERING − SEEL6
FLIGHT CONTROL SYSTEMS A330/A340 &
INSPECTION METHOD :
THSA BALLSCREW PN/SN:
CORROSION CLASIFICATION
DETAILED INSPECTION
WIDE BODY
1 ROND POINT MAURICE BELLONTE
31707 BLAGNAC CEDEX
FRANCE
FAX +33 (0)5 61 93 32 73
 − Z311 Z312
1CS
A
FR87
FR80
B
A
B
BALLSCREW INTEGRITY THSA REPLACED BY
TEST CORRECT PN 47147−500 OR 47147−700(CLASSIFIED TYPE 1)
TYPE 1
YESTYPE 2
TYPE 3
NO
YES NO YES NO
YES NO
N/A N/A
312AR
F_SB_274175_5_RAAA_01_04
Figure A-FRAAA - Sheet 01
Inspection Report
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 2
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 37

@A340
SERVICE BULLETIN
REPORTING SHEET
TITLE: FLIGHT CONTROLS - TRIMMABLE HORIZONTAL STABILIZER
ACTUATOR - THSA SCREW SHAFT LOWER SPLINES INSPECTION
(P/N 47147-500 AND -700)
MODIFICATION No.: None
Please complete the appropriate item (A or B):
A - SB WILL BE
 embodied YES/NO (if NO please comment)
If YES, aircraft concer ned (as per SB effectivity by default) and planned dates (month/year) of
embodiment:
B - SB HAS BEEN
 embodied on aircraft:
Operator comments:
From Airline:
Name/Title:
Signature: Date:
If operational documentation is affected (see Paragraph 1.K of this SB): If information is needed prior to
next normal revision or prior to SB embodiment, please indicate required service(s):
Either: Modification Operational Impact (MOI), if available YES/NO
Or : Intermediate revision YES/NO
Important Information:
 This SB will only be incorporated in your maintenance and operational
documentation if this sheet is returned to Airbus and signed by a duly authorised representative. With
the next feasible revision, this will result in
- Updating of maintenance documentation to show pre and post SB data.
- Updating of maintenance and operational documentation to show post SB data after embodiment.
If this SB requires previous or simultaneous accomplishment of other SBs, Airbus shall automatically
include them in the manual revisions. Refer to SIL 00-037 for detailed information.
Please return this completed sheet to:
AIRBUS
CUSTOMER SERVICES DIRECTORATE
1 Rond Point Maurice Bellonte
31707 BLAGNAC CEDEX FRANCE
Attn: SDC32 Technical Data and Documentation Services
F A X :( + 3 3 )56 19 32 80 6
e-mail: sb.reporting@airbus.com
or via your Resident Customer Support Office.
Alternatively, SB lists via letters or fax are also accepted.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 1
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 38

@A340
SERVICE BULLETIN
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 Bulletins.
We thank you for the time you have taken in completing this form.
(Please rate on a scale of 1 to 4, with 4 being the highest score)
- Quality rating of this SB 4321
- Quality rating of the Accomplishment Instructions 4321
- Quality rating of the Illustrations 4321
- Is this SB easy to understand ? Y/N
If you have had 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 Effectivity X Kit content X Preparation
X Reason X List of Materials Operator Supplied X Mod/Inspection
X Manpower X Industry support X Test
X References X Re-identification X Close-Up
X Publication X Tooling X Illustrations
Comments:
Operator: Date:
Name/Title:
Please return this form to:
AIRBUS
CUSTOMER SERVICES DIRECTORATE
1 Rond Point Maurice Bellonte
31707 BLAGNAC CEDEX FRANCE
Attn : SEM4 Service Bulletins Management
F A X:( 3 3 )56 19 34 25 1
Or via your Resident Customer Support Office.
DATE: Feb 14/12 SERVICE BULLETIN No.: A340-27-4175
REVISION No.: 01 - Jun 13/13 Page: 1
5
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

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