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@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 - INTRODUCE MODIFIED THSA (P/N 47147-700).
**CONF ALL
MODIFICATIONS
MODIFICATION CLASSIFICATION MAJOR 54881D46193 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.
REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES The Trimmable Horizontal Stabilizer Actuator (THSA) has a ball-nut, which forms the primary load path and a threaded nut as the secondary load path. Both run on the screw shaft. In the event of a failure of the primary load path, loads are transferred to the secondary load path. When the secondary nut is loaded, the friction increases between the titanium nut and steel screw due to material characteristics.
Investigations of the THSA trans fer tube have indicated that, under ce rtain cyclic load conditions, the THSA secondary nut does not lock the THSA as expected, but continues to operate with high friction.
This results in damage to the screw and the secondary nut. Operation of the secondary load path is detected by the Flight Control Primary Computers (FCPC) if the THSA efficiency decreases, to such an extent that the position error monitoring threshold is exceeded. If this condition remains undetected, a primary load path failure may result in damage to the screw and secondary nut and, in extreme cases, in failure of the actuator.
This Service Bulletin is published to advise all operators of A340 aircraft of the issue of GOODRICH ACTUATION SYSTEMS Service Bulletin No 47147-27-11.
This Service Bulletin requires the installation of two Electrical Detection Devices (EDD) on the lower attachment secondary load path of the THSA. This EDD is called a "Checkable Shear Pin". The Checkable Shear Pins are installed on each side of the lower attachment to cover the load sharing cases.
DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 1 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY Accomplishment of this Service Bulletin in simultaneous combination with Service Bulletin No.A340-92-4056 or with MOD 52269 embodied by production, will give to the FCPCs a failure indication of the primary load path of the THSA.
Accomplishment of this Service Bulletin in simultaneous combination with Service Bulletin No.A340-92-4056 or with MOD 52269 embodied by production, will permit to revoke the mandated 700FH THSA inspection introduced per AD 2010-0193.
This Service Bulletin cancels the requirements introduced by the Inspection Service Bulletin No.
A340-27-4107.
GENERAL EVALUATION
EVALUATION TABLE
COMPLIANCE MANDATORY (1)
CANCELS INSPECTION SB YES
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 **CONF 001
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
QTY PER A/C
PRICE PER
A/C (USD)
MAIN PARTS Equipment BFEA01 1 See SB THSA **CONF 002
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
QTY PER A/C
PRICE PER
A/C (USD)
MAIN PARTS Equipment BFEA01 1 See SB THSA Component COMPA01 1 See SB BOLT **CONF 003
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
QTY PER A/C
PRICE PER
A/C (USD)
MAIN PARTS Equipment BFEA01 1 See SB THSA DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 2 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY **CONF 004
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
QTY PER A/C
PRICE PER
A/C (USD)
MAIN PARTS Equipment BFEA01 1 See SB THSA Component COMPA01 1 See SB BOLT
EFFECTIVITY **CONF ALL This Service Bulletin is applicable to this (these) operator(s) :
47W 56W AAW AFR ALK ARG B3R CCA CES CPA DGA DLH FIN GFA HFY IBE KAC KNE LAN M3R MAU MSR NMB PAL QAF RJA S3R SAA SLM SWR TAP THY UAE VCV VIR
CONCURRENT REQUIREMENTS Accomplishment of this Service Bulletin requires the prior or simultaneous accomplishment of the following Service Bulletins or the equivalent production modifications :
Service Bulletin No. A340-27-4099 Mod. No. 49591D44011
REFERENCES / REPERCUSSIONS TFU None OEB None AOT None SIL None
LINE MAINTENANCE AFFECTED No
LIFE LIMIT None OTHER None
NATURE OF THE WORK
AIRCRAFT NO
EQUIPMENT YES HARD YES SOFT NO OBRM NO
MANPOWER **CONF 001 Task 274143-831-801-001: Modification
TOTAL MANHOURS
4.00
ELAPSED TIME (HOURS)
4.00 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 3 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY Task 274143-831-801-001: Modification Additional manhours relat ed to Vendor SB; refer to:
Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
GOODRICH ACTUATION SYSTEMS SA Service Bulletin No.
47147-27-11 **CONF 002 Task 274143-831-801-001: Modification
TOTAL MANHOURS
5.00
ELAPSED TIME (HOURS)
4.00 Additional manhours relat ed to Vendor SB; refer to:
Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
GOODRICH ACTUATION SYSTEMS SA Service Bulletin No.
47147-27-11 **CONF 003 Task 274143-831-801-001: Modification
TOTAL MANHOURS
4.00
ELAPSED TIME (HOURS)
5.00 Additional manhours relat ed to Vendor SB; refer to:
Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
GOODRICH ACTUATION SYSTEMS SA Service Bulletin No.
47147-27-11 **CONF 004 Task 274143-831-801-001: Modification
TOTAL MANHOURS
5.00
ELAPSED TIME (HOURS)
5.00 Additional manhours relat ed to Vendor SB; refer to:
Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
GOODRICH ACTUATION SYSTEMS SA Service Bulletin No.
47147-27-11
APPENDICES **CONF ALL None DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 4 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY **CONF 001, 003 ACCESS PANEL 312AR FR80 FR87 AFTER CSP
CONNECTOR A B B Z310 A F_SB_274143_5_SAAA_01_01 Figure A-FSAAA - Sheet 01 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 5 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY **CONF 002, 004 ACCESS PANEL 312AR FR80 FR87 AFTER CSP
CONNECTOR A B B F_SB_274143_5_SAAB_01_00 Z310 A Figure A-FSAAB - Sheet 01 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 6 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@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 - INTRODUCE MODIFIED THSA (P/N 47147-700).
MODIFICATION No.: 54881D46193 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 NOTE : This modification is applicable by Service Bulletin Only.
NOTE : This Service Bulletin is only applicable to aircraft equipped with THS Actuator PN 47147-500.
(1) Models 340-211 340-212 340-213 340-311 340-312 340-313
(2) Effectivity by MSN 0002-0006 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 0101 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 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 1 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@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 0002 0003 0013 0015 AAW 0151 AFR 0029 0078 0084 0186 0207 0210 ALK 0032 0033 0034 ARG 0048 0063 0074 0080 0085 0093 0094 0123 0126 0128 B3R 0046 CCA 0192 0199 0201 CES 0129 0131 0141 0161 0182 CPA 0136 0137 0142 0147 0157 0160 0208 0218 0220 0227 0228 DGA 0075 0081 DLH 0020 0024 0027 0028 0035 0052 0053 0056 0135 0158 0213 FIN 0058 0168 0174 GFA 0212 0215 HFY 0117 0133 IBE 0005 0088 0125 0134 0145 0146 0170 0193 0217 0221 KAC 0089 0090 0101 0104 KNE 0004 LAN 0167 M3R 0061 MAU 0076 0152 0194 MSR 0156 0159 0178 NMB 0047 0051 PAL 0173 0176 0187 0196 QAF 0026 RJA 0014 0022 0038 0043 S3R 0204 SAA 0006 0011 0018 0019 0021 0197 SLM 0049 SWR 0150 0154 0169 0175 0179 TAP 0041 0044 0079 0091 THY 0023 0025 0057 0115 0180 0216 UAE 0139 0149 0163 0166 0185 0190 0202 VCV 0031 VIR 0114 0164 0214 0225 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 2 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
(4) Configuration by MSN MSN
CONFIGURATION 0002 0003 0013 0015 0020 0024 0027 0028 0029 0032 0033 0034 0035 0041 0044 0047 0048 0049 0051 0052 0053 0056 0057 0076 0078 0084 0089 0090 0093 0094 0101 0104 0114 0115 0117 0123 0126 0128 0129 0131 0133 0135 0136 0137 0141 0142 0145 0146 0147 0154 0157 0158 0160 0161 0164 0167 0168 0170 0173 0174 0175 0176 0179 0182 0185 0186 0187 0190 0192 0196 0197 0199 0201 0208 0212 0213 0214 0215 0218 0220 0225 0227 0228 003 004 0004 0006 0009 0011 0014 0018 0019 0021 0022 0026 0031 0046 0061 0063 0074 0080 0085 0156 0159 0178 0204 001 002 0005 0023 0025 0058 0079 0088 0091 0125 0134 0139 0149 0150 0152 0163 0166 0169 0180 0193 0194 0202 0207 0210 0216 0217 0221 004 0038 0043 0075 0081 0151 002
(5) Configuration definition **CONF 001 Config. 001 is valid for aircraft A340-200 on which Service Bulletin No A340-92-4056 is not accomplished or Modification No 52269 D44449 is not embodied in production and details the work necessary to embody the modification with the THSA installed on the aircraft.
**CONF 002 Config. 002 is valid for aircraft A340-200 on which Service Bulletin No A340-92-4056 is accomplished or Modification No 52269 D44449 is embodied in production and details the work necessary to embody the modification with the THSA installed on the aircraft.
**CONF 003 Config. 003 is valid for aircraft A340-300 on which Service Bulletin No A340-92-4056 is not accomplished or Modification No 52269 D44449 is not embodied in production and details the work necessary to embody the modification with the THSA installed on the aircraft.
**CONF 004 Config. 004 is valid for aircraft A340-300 on which Service Bulletin No A340-92-4056 is accomplished or Modification No 52269 D44449 is embodied in production and details the work necessary to embody the modification with the THSA installed on the aircraft.
(6) Material Effectivity **CONF 001, 003
MATERIAL
QTY PER A/C
SEE NOTES Equipment BFEA01 1 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 3 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN **CONF 002, 004
MATERIAL
QTY PER A/C
SEE NOTES Equipment BFEA01 1 Component COMPA01 1 **CONF ALL B. CONCURRENT REQUIREMENTS Accomplishment of this Service Bulletin requires the prior or simultaneous accomplishment of the following Service Bulletins or the equivalent production modifications :
Service Bulletin No. A340-27-4099 Mod. No. 49591D44011 C. REASON
(1) History The Trimmable Horizontal Stabilizer Actuator (THSA) has a ball-nut, which forms the primary load path and a threaded nut as the secondary load path. Both run on the screw shaft. In the event of a failure of the primary load path, loads are transferred to the secondary load path. When the secondary nut is loaded, the friction increases between the titanium nut and steel screw due to material characteristics. Investigations of the THSA transfer tube have indicated that, under certain cyclic load conditions, the THSA secondary nut does not lock the THSA as expected, but continues to operate with high friction. This results in damage to the screw and the secondary nut. Operation of the secondary load path is detected by the Flight Control Primary Computers (FCPC) if the THSA efficiency decreases, to such an extent that the position error monitoring threshold is exceeded. If this condition remains undetected, a primary load path failure may result in damage to the screw and secondary nut and, in extreme cases, in failure of the actuator.
(2) Objective/Action This Service Bulletin is published to advise all operators of A340 aircraft of the issue of GOODRICH ACTUATION SYSTEMS Ser vice Bulletin No 47147-27-11.
This Service Bulletin requires the installation of two Electrical Detection Devices (EDD) on the lower attachment secondary load path of the THSA. This EDD is called a "Checkable Shear Pin". The Checkable Shear Pins are installed on each side of the lower attachment to cover the load sharing cases.
(3) Advantages Accomplishment of this Service Bulletin in simultaneous combination with Service Bulletin No.A340-92-4056 or with MOD 52269 embodied by production, will give to the FCPCs a failure indication of the primary load path of the THSA.
DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 4 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
(4) Operational/Maintenance Consequences Accomplishment of this Service Bulletin in simultaneous combination with Service Bulletin No.A340-92-4056 or with MOD 52269 embodied by production, will permit to revoke the mandated 700FH THSA inspection introduced per AD 2010-0193.
This Service Bulletin cancels the requirements introduced by the Inspection Service Bulletin No. A340-27-4107.
D. DESCRIPTION To accomplish this Service Bulletin it is necessary to :
**CONF 001 Task 274143-831-801-001: Modification
(1) Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
**CONF 002 Task 274143-831-801-001: Modification
(1) Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
(2) Remove the Closing Plug from the Electrical Harness 4515VB.
(3) Connect the Electrical Harness 4515VB to the THSA.
**CONF 003 Task 274143-831-801-001: Modification
(1) Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
**CONF 004 Task 274143-831-801-001: Modification
(1) Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
(2) Remove the Closing Plug from the Electrical Harness 4515VB.
(3) Connect the Electrical Harness 4515VB to the THSA.
**CONF ALL E. COMPLIANCE
(1) Classification MANDATORY: Service Bulletin must be accomplished.
DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 5 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
(2) Accomplishment Timescale 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. The accomplishment timescale, which has not yet been defined, will be given in the AD.
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 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 274143-831-801-001: Modification Get Access
2.00 On Aircraft Tests
0.50 Close-Up
1.50
TOTAL MANHOURS
4.00
ELAPSED TIME (HOURS)
4.00 Additional manhours relat ed to Vendor SB; refer to:
Modify the Trimmable Horizontal Stabilizer Actuator (THSA) FIN 1CS on aircraft.
GOODRICH ACTUATION SYSTEMS SA Service Bulletin No.
47147-27-11 **CONF 002 Task 274143-831-801-001: Modification Get Access
2.00 On Aircraft Remove the Closing Plug from the Electrical Harness 4515VB.
0.50 Connect the Electrical Harness 4515VB to the THSA.
0.50 Tests
0.50 Close-Up
1.50 DATE: Feb 21/12 SERVICE BULLETIN No.: A340-27-4143 REVISION No.: 00 - Feb 21/12 Page: 6 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.