# Airbus Service Bulletin A340-49-4037

Copy: No revision named ("A340-49-4037 R00"), 24 pages: PDF https://openairdocs.org/files/sha256/4a/77/4a778b981d6750400d7d2cef66051a77ce7257988a7bc996831523044f50f758; text https://openairdocs.org/service-documents/airbus/a340-49-4037/file/4a778b981d67.md. Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2023-0019, the docket of AD 2023-06-07. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Airbus](https://openairdocs.org/service-documents/airbus.md)
- Type: Service bulletin (Service Bulletin)
- Number: A340-49-4037
- Page: https://openairdocs.org/service-documents/airbus/a340-49-4037

## Text (24 pages)

Rights: © Airbus S.A.S. Filed by the FAA in regulations.gov docket FAA-2023-0019, the docket of AD 2023-06-07. 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
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.
ATA SYSTEM: 49
TITLE: AIRBORNE AUXILI ARY POWER (APU) - BLEED AND SURGE AIR - APU
331-350 T-DUCT IMPROVEMENT.
**CONF ALL
MODIFICATIONS
MODIFICATION CLASSIFICATION
MAJOR
 None
MINOR
 201177C10820
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.
REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES
There have been three failures in the Tee-Duct of Auxiliary Power Unit (APU) because of a rupture in
the Tee-Duct sheet-metal.
In two of the failures, damage was seen on the adjacent aircraft firewall. A material analysis was
completed on the ruptured Tee-Ducts.
The analysis shows that cracks started because of h igh cycle f atigue at the fillet weld on the aft
attachment bracket for fuel lines of the surge control valve (SCV).
This Service Bulletin tells all operators of A340 aircraft about the issue of HONEYWELL Service Bulletin
No. GTCP331-49-8025.
This Service Bulletin replaces the Tee-Duct, PN 3884654-4 or PN 3884654-5, with PN 3884654-6.
The new Tee-Duct PN 3884654-6 decreases the risk of Tee-Duct rupture because of the following
changes in its design:
- Reduction in stress throughout the cylinder section of the duct because of thickness increase and
better bracket geometry and attachment.
- Better quality bracket welding.
- High cycle-fatigue margin increased.
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 1
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

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@A340
SERVICE BULLETIN
SUMMARY
- Location of welds of the Tee-Duct section controlled to prevent weld to weld interaction.
GENERAL EVALUATION
EVALUATION TABLE
COMPLIANCE
 RECOMMENDED (1)
 CANCELS INSPECTION SB
 NO
POTENTIAL AD
 NO
 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 recommended to be accomplished to prevent significant operational
disruptions.
MATERIAL PRICE INFORMATION
**CONF 001
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
 QTY PER
A/C
PRICE PER
A/C (USD)
MAIN PARTS
Component COMPC01
 1
 See SB
**CONF 002
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
 QTY PER
A/C
PRICE PER
A/C (USD)
MAIN PARTS
Component COMPC01
 1
 See SB
EFFECTIVITY
**CONF ALL
This Service Bulletin is applicable to this (these) operator(s) :
47W 56W 83V AAW AFR AIB ALK ARG B3R CAL CCA CES CPA
DGA DLH FIN GAF GFA HFY IBE KAC LAN LHT M3R MAU MSR
NMB OAL PAL QAF R3L RJA S3R SAA SAS SFW SLM SVW SWR
TAP THT THY UAE VCV VIR XAX
CONCURRENT REQUIREMENTS
None
REFERENCES / REPERCUSSIONS
TFU
 49.51.42.001
OEB
 None
AOT
 None
SIL
 None
LINE MAINTENANCE AFFECTED
 No
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 2
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

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@A340
SERVICE BULLETIN
SUMMARY
LIFE LIMIT
 None
OTHER
 None
NATURE OF THE WORK
AIRCRAFT
 NO
EQUIPMENT
 YES
HARD
 YES
SOFT
 NO
OBRM
 NO
MANPOWER
**CONF 001
Task 494037-831-942-001: Modification
TOTAL MANHOURS
 3.00
ELAPSED TIME (HOURS)
 3.00
Additional manhours relat ed to Vendor SB; refer to:
Replace the APU Tee-Duct
 Honeywell Service Bulletin No.
GTCP331-49-8025
**CONF 002
Task 494037-831-942-001: Modification
TOTAL MANHOURS
 3.00
ELAPSED TIME (HOURS)
 3.00
Additional manhours relat ed to Vendor SB; refer to:
Replace the APU Tee-Duct
 Honeywell Service Bulletin No.
GTCP331-49-8025
APPENDICES
**CONF ALL
None
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 3
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

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@A340
SERVICE BULLETIN
SUMMARY
**CONF ALL
Z316TEE DUCT
A
A
FR95
FR101
Z310
F_SB_494037_0_SAAA_01_00
Figure A-SSAAA - Sheet 01
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 4
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

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@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
ATA SYSTEM: 49
TITLE: AIRBORNE AUXILI ARY POWER (APU) - BLEED AND SURGE AIR - APU
331-350 T-DUCT IMPROVEMENT.
MODIFICATION No.: 201177C10820
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
0002-0006 0008-0009 0011 0013-0015 0018-0029 0031-0035 0038-0041 0043-0044
0046-0049 0051-0053 0056-0058 0061 0063 0074-0076 0078-0081 0084-0085
0088-0091 0093-0094 0097 0101 0103-0104 0114-0115 0117 0123 0125-0126
0128-0129 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 0239 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 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 1
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

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@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
47W
 0009
56W
 0013
83V
 0039 0040 0097 0103 0133
AAW
 0151
AFR
 0029 0078 0084 0174 0186 0207 0210 0237 0245 0246 0260 0307
0310 0319 0373 0377 0399
AIB
 0414
ALK
 0032 0033 0034 0367 0374
ARG
 0048 0063 0074 0080 0085 0093 0094
B3R
 0046
CAL
 0402 0406 0411 0415 0433 0541
CCA
 0192 0199 0201 0242 0243 0264
CES
 0129 0131 0141 0161 0182
CPA
 0123 0126 0128 0136 0137 0142 0147 0157 0160 0208 0218 0220
0227 0228 0381
DGA
 0075 0081
DLH
 0020 0024 0027 0028 0035 0052 0053 0056 0135 0158 0213 0233
0252 0297 0304 0321 0325 0327 0335 0347 0352 0354 0379 0390
0434 0447
FIN
 0058 0168 0835 0844 0921 0938
GAF
 0274
GFA
 0212 0215 0282 0554
HFY
 0117 0450
IBE
 0005 0088 0125 0134 0145 0146 0170 0193 0217 0221 0302 0318
0329 0332 0387 0459 0474 0483
KAC
 0089 0090 0101 0104
LAN
 0167 0359 0363 0429 0442
LHT
 0355
M3R
 0061
MAU
 0076 0152 0194 0268 0793 0800
MSR
 0156 0159 0178
NMB
 0047 0051
OAL
 0235 0239 0280 0292
PAL
 0173 0176 0187 0196
QAF
 0026 0528
R3L
 0004
RJA
 0014 0022 0038 0043
S3R
 0204
SAA
 0006 0008 0011 0018 0019 0021 0197 0378 0544 0582 0590 0643
0646 0651
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 2
0
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@A340
SERVICE BULLETIN
OPERATOR
 MSN
SAS
 0413 0424 0430 0435 0467 0470
SFW
 0015
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 0216 0257 0270 0331
UAE
 0139 0149 0163 0166 0185 0190 0202 0236
VCV
 0031
VIR
 0002 0003 0114 0164 0214 0225
XAX
 0273 0278
(4) Configuration by MSN
MSN
 CONFIGURATION
0002 0003 0005 0013 0015 0020 0023 0024 0025 0027 0028
0029 0032 0033 0034 0035 0039 0040 0041 0044 0047 0048
0049 0051 0052 0053 0056 0057 0058 0076 0078 0079 0084
0088 0089 0090 0091 0093 0094 0097 0101 0103 0104 0114
0115 0117 0123 0125 0126 0128 0129 0131 0133 0134 0135
0136 0137 0139 0141 0142 0145 0146 0147 0149 0150 0152
0154 0157 0158 0160 0161 0163 0164 0166 0167 0168 0169
0170 0173 0174 0175 0176 0179 0180 0182 0185 0186 0187
0190 0192 0193 0194 0196 0197 0199 0201 0202 0207 0208
0210 0212 0213 0214 0215 0216 0217 0218 0220 0221 0225
0227 0228 0233 0235 0236 0237 0239 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
002
0004 0006 0008 0009 0011 0014 0018 0019 0021 0022 0026
0031 0038 0043 0046 0061 0063 0074 0075 0080 0081 0085
0151 0156 0159 0178 0204
001
(5) Configuration definition
**CONF 001
Config. 001 is valid for all the A340-200 aircraft models given in the effectivity of this
Service Bulletin.
**CONF 002
Config. 002 is valid for all the A340-300 aircraft models given in the effectivity of this
Service Bulletin.
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 3
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 8

@A340
SERVICE BULLETIN
(6) Material Effectivity
MATERIAL
 QTY PER A/C
 SEE NOTES
Consumable CMLC01
 1
Component COMPC01
 1
B. CONCURRENT REQUIREMENTS
None
C. REASON
(1) History
There have been three failures in the Tee-Duct of Auxiliary Power Unit (APU) because
of a rupture in the Tee-Duct sheet-metal.
In two of the failures, damage was seen on the adjacent aircraft firewall. A material
analysis was completed on the ruptured Tee-Ducts.
The analysis shows that cracks started becaus e of high cycle f atigue at the fillet weld on
the aft attachment bracket for fuel lines of the surge control valve (SCV).
(2) Objective/Action
This Service Bulletin tells all operators of A340 aircraft about the issue of HONEYWELL
Service Bulletin No. GTCP331-49-8025.
This Service Bulletin replaces the Tee-Duct, PN 3884654-4 or PN 3884654-5, with PN
3884654-6.
(3) Advantages
The new Tee-Duct PN 3884654-6 decreases the risk of Tee-Duct rupture because of the
following changes in its design:
- Reduction in stress throughout the cylinder section of the duct because of thickness
increase and better bracket geometry and attachment.
- Better quality bracket welding.
- High cycle-fatigue margin increased.
- Location of welds of the Tee-Duct section controlled to prevent weld to weld
interaction.
(4) Operational/Maintenance Consequences
None
D. DESCRIPTION
To accomplish this Service Bulletin it is necessary to :
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 4
0
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@A340
SERVICE BULLETIN
**CONF 001
Task 494037-831-942-001: Modification
(1) Replace the APU Tee-Duct
**CONF 002
Task 494037-831-942-001: Modification
(1) Replace the APU Tee-Duct
**CONF ALL
E. COMPLIANCE
(1) Classification
RECOMMENDED: Service Bulletin recommended to be accomplished to prevent
significant operational disruptions.
(2) Accomplishment Timescale
Accomplishment of this Service Bulletin is recommended at the earliest opportunity
where manpower and facilities are available.
F. APPROVAL
Approved under EASA Design Organisation Approval No. EASA 21J.031.
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.
**CONF 001
Task 494037-831-942-001: Modification
Get Access
 1.00
Tests
 1.00
Close-Up
 1.00
TOTAL MANHOURS
 3.00
ELAPSED TIME (HOURS)
 3.00
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 5
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 10

@A340
SERVICE BULLETIN
Task 494037-831-942-001: Modification
Additional manhours relat ed to Vendor SB; refer to:
Replace the APU Tee-Duct
 Honeywell Service Bulletin No.
GTCP331-49-8025
**CONF 002
Task 494037-831-942-001: Modification
Get Access
 1.00
Tests
 1.00
Close-Up
 1.00
TOTAL MANHOURS
 3.00
ELAPSED TIME (HOURS)
 3.00
Additional manhours relat ed to Vendor SB; refer to:
Replace the APU Tee-Duct
 Honeywell Service Bulletin No.
GTCP331-49-8025
**CONF ALL
H. WEIGHT AND BALANCE
**CONF 001
The weight and balance estimates given in this Service Bulletin are based on the
Manufacturer’s Empty Weight (MEW) and do not include operator item’s. For the definition of
MEW and operator’s items refer to Weight and Balance Manual (WBM) Chapter 1-00-07.
Manufacturers Empty Weight +0.430 KG (+0.948 LB)
Effect on Balance +26.565 KGM (+58.571 LB.FT )
**CONF 002
The weight and balance estimates given in this Service Bulletin are based on the
Manufacturer’s Empty Weight (MEW) and do not include operator item’s. For the definition of
MEW and operator’s items refer to Weight and Balance Manual (WBM) Chapter 1-00-07.
Manufacturers Empty Weight +0.430 KG (+0.948 LB)
Effect on Balance +28.400 KGM (+62.605 LB.FT )
**CONF ALL
I. ELECTRICAL LOAD DATA
Not Changed
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 6
0
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@A340
SERVICE BULLETIN
J. REFERENCES
**CONF 001
Aircraft Maintenance Manual (AMM)
 06-20-00 06-31-53 06-41-53
12-34-24 49-51-42
Consumable Material List (CML)
ATA Common Support Data Dictionary (CSDD),
Chapter 2
Elec. Std. Practices Manual (ESPM)
 20-55-00
Standards Manual (SM)
Structural Repair Manual (SRM)
 51-42-00
Vendor Service Bulletin (VSB)
 Honeywell Service Bulletin No.
GTCP331-49-8025
Weight and Balance Manual (WBM)
 Weight and Balance Manual
(WBM) Chapter 1-00-07
**CONF 002
Aircraft Maintenance Manual (AMM)
 06-20-00 06-31-53 06-41-53
12-34-24 49-51-42
Consumable Material List (CML)
ATA Common Support Data Dictionary (CSDD),
Chapter 2
Elec. Std. Practices Manual (ESPM)
 20-55-00
Standards Manual (SM)
Structural Repair Manual (SRM)
 51-42-00
Vendor Service Bulletin (VSB)
 Honeywell Service Bulletin No.
GTCP331-49-8025
Weight and Balance Manual (WBM)
 Weight and Balance Manual
(WBM) Chapter 1-00-07
**CONF ALL
K. PUBLICATION AFFECTED
Aircraft Maintenance Manual (AMM)
 49-51-42
Illustrated Parts Catalog (IPC)
 49-51-04 49-51-42
L. INTERCHANGEABILITY/MIXABILITY
**CONF 001
DESCRIPTION
 OLD PART N˚
 NEW PART N˚
 INT
 MIXABILITY
 SEE
NOTES
Duct-Tee
 3884654-4
 3884654-6
 01
 Not
Applicable
(1)
Duct-Tee
 3884654-5
 3884654-6
 01
 Not
Applicable
(1)
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 7
0
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SERVICE BULLETIN
NOTE
: For definitions of interchangeability codes in column INT., refer to ATA
Common Support Data Dictionary (CSDD), Chapter 2.
NOTE
 (1)
: Only one of the Tee-Duct Old Part Numbers will be in the APU. The existing
one must be replaced with the new Part Number.
**CONF 002
DESCRIPTION
 OLD PART N˚
 NEW PART N˚
 INT
 MIXABILITY
 SEE
NOTES
Duct-Tee
 3884654-4
 3884654-6
 01
 Not
Applicable
(1)
Duct-Tee
 3884654-5
 3884654-6
 01
 Not
Applicable
(1)
NOTE
: For definitions of interchangeability codes in column INT., refer to ATA
Common Support Data Dictionary (CSDD), Chapter 2.
NOTE
 (1)
: Only one of the Tee-Duct Old Part Numbers will be in the APU. The existing
one must be replaced with the new Part Number.
**CONF ALL
M. SPARES
None
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 8
0
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SERVICE BULLETIN
2. MATERIAL INFORMATION
**CONF ALL
A. MATERIAL - PRICE AND AVAILABILITY
(1) Procurement Addresses
Modification of removed equipment should be negotiated directly with HONEYWELL as
per instructions given in HONEYWELL Service Bulletin GTCP331-49-8025.
(2) Price and Availability
Refer to the HONEYWELL Service Bulletin GTCP331-49-8025 for the equipment
modification sales terms.
B. INDUSTRY SUPPORT INFORMATION
Refer to the HONEYWELL Service Bulletin GTCP331-49-8025 for the industry support terms.
C. LIST OF COMPONENTS
No Kit
D. LIST OF MATERIALS - OPERATOR SUPPLIED
(1) Consumable Materials
Consumable CMLC01
ITEM
 DESCRIPTION
 REFERENCE TO CML
MAT. No.
QTY PER A/C
 SEE
NOTES
Solvent General Purpose
 11-026
 As required
Lint-Free Cotton Cloth
 19-003
 As required
(2) Components
Component COMPC01
ITEM
 NEW PART N˚
 QTY (UM)
 KEYWORD
 ITEM
 OLD PART N˚
 INT
 SEE
NOTES
3884654-6
 1
 DUCT
 3884654-4
 01
3884654-5
 01
NOTE
: For definitions of interchangeability codes in column INT., refer to ATA
Common Support Data Dictionary (CSDD), Chapter 2.
(3) Equipment
None
E. PARTS TO BE RE-IDENTIFIED BY OPERATOR
None
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 9
0
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SERVICE BULLETIN
F. TOOLING
None
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 10
0
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SERVICE BULLETIN
3. ACCOMPLISHMENT INSTRUCTIONS
Task 494037-831-942-001 - Modification
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
**CONF 001
Zone
From 315 to 316
Access
Door
 315AL 316AR
Manpower
TOTAL MANHOURS
 3.00
ELAPSED TIME (HOURS)
 3.00
Additional manhours related to Vendor SB; refer to:
Honeywell Service Bulletin No. GTCP331-49-8025
**CONF 002
Zone
From 315 to 316
Access
Door
 315AL 316AR
Manpower
TOTAL MANHOURS
 3.00
ELAPSED TIME (HOURS)
 3.00
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 11
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 16

@A340
SERVICE BULLETIN
Additional manhours related to Vendor SB; refer to:
Honeywell Service Bulletin No. GTCP331-49-8025
**CONF ALL
A. GENERAL
**CONF 001
(1) Subtask 494037-910-601-001 - Standard Practices
Manpower Resources
Skills
 NON SPECIFIC
Material necessary to do the job
Consumable CMLC01
ITEM
 DESCRIPTION
 REFERENCE TO
CML MAT. No.
QTY PER A/C
 SEE
NOTES
Solvent General Purpose
 11-026
 As required
Lint-Free Cotton Cloth
 19-003
 As required
References
Aircraft Maintenance Manual (AMM)
 06-20-00, Page Block 001
06-31-53, Page Block 001
06-41-53, Page Block 001
Consumable Material List (CML)
Standards Manual (SM)
Structural Repair Manual (SRM)
 51-42-00
(a) For the specification of materials (Mat. No.) that you must use in this Service
Bulletin refer to Consumable Materials List (CML).
(b) For the identification of Zones (Refer to AMM 06-20-00, Page Block 001).
(c) For the Frame (FR) identification (Refer to AMM 06-31-53, Page Block 001).
(d) For the identification of access panels (Refer to AMM 06-41-53, Page Block 001).
(e) Clean the work area with:
Lint-Free Cotton
Cloth
19-003 As required
Solvent General
Purpose
11-026 As required
(2) Subtask 494037-839-601-001 - Documentation
Manpower Resources
Skills
 NON SPECIFIC
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 12
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 17

@A340
SERVICE BULLETIN
(a) Write in the applicable aircraft records that you have done all the work given in this
Service Bulletin.
**CONF 002
(1) Subtask 494037-910-601-001 - Standard Practices
Manpower Resources
Skills
 NON SPECIFIC
Material necessary to do the job
Consumable CMLC01
ITEM
 DESCRIPTION
 REFERENCE TO
CML MAT. No.
QTY PER A/C
 SEE
NOTES
Solvent General Purpose
 11-026
 As required
Lint-Free Cotton Cloth
 19-003
 As required
References
Aircraft Maintenance Manual (AMM)
 06-20-00, Page Block 001
06-31-53, Page Block 001
06-41-53, Page Block 001
Consumable Material List (CML)
Standards Manual (SM)
Structural Repair Manual (SRM)
 51-42-00
(a) For the specification of materials (Mat. No.) that you must use in this Service
Bulletin refer to Consumable Materials List (CML).
(b) For the identification of Zones (Refer to AMM 06-20-00, Page Block 001).
(c) For the Frame (FR) identification (Refer to AMM 06-31-53, Page Block 001).
(d) For the identification of access panels (Refer to AMM 06-41-53, Page Block 001).
(e) Clean the work area with:
Lint-Free Cotton
Cloth
19-003 As required
Solvent General
Purpose
11-026 As required
(2) Subtask 494037-839-601-001 - Documentation
Manpower Resources
Skills
 NON SPECIFIC
(a) Write in the applicable aircraft records that you have done all the work given in this
Service Bulletin.
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 13
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 18

@A340
SERVICE BULLETIN
**CONF ALL
B. PREPARATION
**CONF 001
(1) Subtask 494037-941-601-001 - Job Set-up
Work Zones and Access Panels
Zone
 Access/Work location
From
 315
 Access
 Door 315AL
To
 316
 Access
 Door 316AR
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 12-34-24-860-802
Task 49-51-42-000-801
(a) Make sure that the aircraft is electrically grounded (Refer to AMM Task
12-34-24-860-802).
(b) Put a warning notice in the cockpit to tell persons not to start the APU.
(c) Do the Job Set-up procedure as specified in the task "Removal of the Bleed-Air
Tee-Duct" (Refer to AMM Task 49-51-42-000-801).
**CONF 002
(1) Subtask 494037-941-601-001 - Job Set-up
Work Zones and Access Panels
Zone
 Access/Work location
From
 315
 Access
 Door 315AL
To
 316
 Access
 Door 316AR
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 12-34-24-860-802
Task 49-51-42-000-801
(a) Make sure that the aircraft is electrically grounded (Refer to AMM Task
12-34-24-860-802).
(b) Put a warning notice in the cockpit to tell persons not to start the APU.
(c) Do the Job Set-up procedure as specified in the task "Removal of the Bleed-Air
Tee-Duct" (Refer to AMM Task 49-51-42-000-801).
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 14
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 19

@A340
SERVICE BULLETIN
**CONF ALL
C. PROCEDURE
**CONF 001
(1) Subtask 494037-831-601-001 - Replace the APU Tee-Duct
Material necessary to do the job
Component COMPC01
ITEM
 NEW PART N˚
 QTY (UM)
 KEYWORD
 SEE
NOTES
3884654-6
 1
 DUCT
References
Aircraft Maintenance Manual (AMM)
 Task 49-51-42-000-801
Task 49-51-42-400-801
Vendor Service Bulletin (VSB)
 Honeywell GTCP331-49-8025
Fig. A-SBAAA
Location of the Tee-Duct
Sheet 01
(a) Replace the Tee-Duct (Refer to Honeywell Service Bulletin No. GTCP331-49-8025)
(Refer to Fig. A-SBAAA Sheet 01
).
1
 Remove the Tee-Duct (Refer to AMM Task 49-51-42-000-801)
1 Duct-Tee 3884654-4
or
1 Duct-Tee 3884654-5
NOTE
: Only one of the two removed Part Numbers will be in the APU.
2
 Install the Tee-Duct (Refer to AMM Task 49-51-42-400-801)
1 Duct-Tee 3884654-6
**CONF 002
(1) Subtask 494037-831-601-001 - Replace the APU Tee-Duct
Material necessary to do the job
Component COMPC01
ITEM
 NEW PART N˚
 QTY (UM)
 KEYWORD
 SEE
NOTES
3884654-6
 1
 DUCT
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 15
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 20

@A340
SERVICE BULLETIN
References
Aircraft Maintenance Manual (AMM)
 Task 49-51-42-000-801
Task 49-51-42-400-801
Vendor Service Bulletin (VSB)
 Honeywell GTCP331-49-8025
Fig. A-SBAAA
Location of the Tee-Duct
Sheet 01
(a) Replace the Tee-Duct (Refer to Honeywell Service Bulletin No. GTCP331-49-8025)
(Refer to Fig. A-SBAAA Sheet 01
).
1
 Remove the Tee-Duct (Refer to AMM Task 49-51-42-000-801)
1 Duct-Tee 3884654-4
or
1 Duct-Tee 3884654-5
NOTE
: Only one of the two removed Part Numbers will be in the APU.
2
 Install the Tee-Duct (Refer to AMM Task 49-51-42-400-801)
1 Duct-Tee 3884654-6
**CONF ALL
D. TEST
**CONF 001
(1) Subtask 494037-790-601-001 - Leak Test
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 49-51-42-400-801
(a) Do the leak test as specified in the task "Installation of the Bleed-Air Tee-Duct"
(Refer to AMM Task 49-51-42-400-801).
**CONF 002
(1) Subtask 494037-790-601-001 - Leak Test
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 49-51-42-400-801
(a) Do the leak test as specified in the task "Installation of the Bleed-Air Tee-Duct"
(Refer to AMM Task 49-51-42-400-801).
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 16
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 21

@A340
SERVICE BULLETIN
**CONF ALL
E. CLOSE-UP
**CONF 001
(1) Subtask 494037-942-601-001 - Close-up
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 49-51-42-400-801
(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 task "Installation of the Bleed-Air
Tee-Duct" (Refer to AMM Task 49-51-42-400-801).
(c) Remove the warning notice from the cockpit.
**CONF 002
(1) Subtask 494037-942-601-001 - Close-up
Manpower Resources
Skills
 NON SPECIFIC
References
Aircraft Maintenance Manual (AMM)
 Task 49-51-42-400-801
(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 task "Installation of the Bleed-Air
Tee-Duct" (Refer to AMM Task 49-51-42-400-801).
(c) Remove the warning notice from the cockpit.
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 17
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 22

@A340
SERVICE BULLETIN
**CONF ALL
Z316TEE DUCT
A
A
FR95
FR101
Z310
F_SB_494037_0_BAAA_01_00
Figure A-SBAAA - Sheet 01
Location of the Tee-Duct
DATE: Feb 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 18
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 23

@A340
SERVICE BULLETIN
REPORTING SHEET
TITLE: AIRBORNE AUXILI ARY POWER (APU) - BLEED AND SURGE AIR - APU
331-350 T-DUCT IMPROVEMENT.
MODIFICATION No.: 201177C10820
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 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 1
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

### Page 24

@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 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
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 22/11 SERVICE BULLETIN No.: A340-49-4037
REVISION No.: 00 - Feb 22/11 Page: 1
0
Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.

---
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