# @A340 SERVICE BULLETIN SUMMARY AIRBUS CUSTOMER SERVICES DIRECTORATE 1 Rond Point Maurice Bellonte 31707 BLAGNAC CEDEX FRANCE Tel : (33) 5 61 93 33 33 Telex : AIRBU 530526F Fax : (33) 5 61 93 42 51 This summary is for information only and is not approved for modification of the aircraft. ATA SYSTEM: 27

### TITLE: FLIGHT CONTROLS - ELECTRICAL BACK-UP - INSTALL NEW BACKUP CONTROL MODULE (BCM) ON ENHANCED A340. **CONF ALL MODIFICATIONS MODIFICATION CLASSIFICATION MAJOR 58118S30423 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 During BCM (Back-up Control Module) retrofit as per Airbus SB Ref. A340-27-4142 and SAGEM Service Bulletin 418-27-010 introducing BCM PN 418-00877-102 (replacement of corroded resistances at SAGEM facilities), some attachment screws of the internal gyrometer have been found loosened within the equipment. A loose attachment of the gyrometer may induce erroneous yaw data leading to a degradation of the piloting laws when the aircraft is in back up control configuration. Investigations performed at manufacturer’s facility pointed out that screws loosening on BCM Part Number (P/N) 418-00877-100, 418-00877-101 and 418-00877-102 are due to temperature variations combined with vibrations. This scenario is only considered for aircraft with electrical rudder (post-mod 49144). This Service Bulletin is published to advise all operators of A340 enhanced aircraft fitted with electrical rudder (post-mod 49144) of the issue of SAGEM Service Bulletin No. 418-27-011. The design solution uses a positive locking device for the fixation of the gyrometer and additional locking washers for the attachment of the electronic card. These improvements under supplier responsibility (SAGEM) lead to introduce a new BCM PN 418-00877-103 amendment A. Accomplishment of this Service Bulletin will contribute to ensure the reliability of the yaw data provided by the BCM. This Service Bulletin will cancel AD 2009-0153 if associated with the modification of Pedal Feel and Trim Unit (Ref OIT SE 999.0058/09/LB). Only in case of this association, aircraft dispatch with FCPC3 (PRIM 3) inoperative (MMEL 27-93-01-C) for A340-300 aircraft fitted with MOD 49144 will be restored.
DATE: Nov 06/09 SERVICE BULLETIN No.: A340-27-4160 REVISION No.: 00 - Nov 06/09 Page: 1 5

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# @A340 SERVICE BULLETIN SUMMARY GENERAL EVALUATION EVALUATION TABLE COMPLIANCE RECOMMENDED 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 MATERIAL PRICE INFORMATION MATERIAL PRICE INFORMATION TABLE MATERIAL SET QTY PER A/C PRICE PER A/C (USD) MAIN PARTS Equipment BFEA01 1 See SB Back-up control module EFFECTIVITY This Service Bulletin is applicable to this (these) operator(s) :

FIN MAU SAA SVW SWR THT CONCURRENT REQUIREMENTS Accomplishment of this Service Bulletin requires the prior or simultaneous accomplishment of the following Service Bulletin(s) or the equivalent production modification(s): Service Bulletin No. A340-27-4142 Mod. No. 55185S18591 REFERENCES / REPERCUSSIONS TFU 27.99.00.003 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 Task 274160-831-801-001: Modification TOTAL MANHOURS 3.50 ELAPSED TIME (HOURS) 3.50
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# @A340 SERVICE BULLETIN SUMMARY Task 274160-831-801-001: Modification Additional manhours related to Vendor SB; refer to: Modify the Back-up Control Module 42CS SAGEM SA Service Bulletin No. 418-27-011 APPENDICES None

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# @A340 SERVICE BULLETIN SUMMARY

**CONF ALL

F_SB_274160_5_SUAA_01_00 FR80 FR79

FR75 

## A Z170 

### A **B**

42CS



## B

Figure A-FSUAA - Sheet 01

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# @A340 SERVICE BULLETIN

AIRBUS CUSTOMER SERVICES DIRECTORATE 1 Rond Point Maurice Bellonte 31707 BLAGNAC CEDEX FRANCE Tel : (33) 5 61 93 33 33 Telex : AIRBU 530526F Fax : (33) 5 61 93 42 51 ATA SYSTEM: 27

### TITLE: FLIGHT CONTROLS - ELECTRICAL BACK-UP - INSTALL NEW BACKUP CONTROL MODULE (BCM) ON ENHANCED A340. MODIFICATION No.: 58118S30423 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 Service Bulletin is only applicable to aircraft on which modification No. 49144S16279 (INSTALL RUDDER FLY-BY WIRE ON A330/A340) is embodied. (1) Models 340-313 (2) Effectivity by MSN 0544 0582 0585 0590 0598 0643 0646 0651 0668 0793 0800 0835 0844 0921 0938 0955 (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 FIN 0835 0844 0921 0938 MAU 0793 0800 DATE: Nov 06/09 SERVICE BULLETIN No.: A340-27-4160 REVISION No.: 00 - Nov 06/09 Page: 1 5

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# @A340 SERVICE BULLETIN

OPERATOR MSN SAA 0544 0582 0590 0643 0646 0651 SVW 0955 SWR 0585 0598 THT 0668 (4) Configuration by MSN MSN CONFIGURATION 0544 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 Equipment BFEA01 1 B. CONCURRENT REQUIREMENTS Accomplishment of this Service Bulletin requires the prior or simultaneous accomplishment of the following Service Bulletin(s) or the equivalent production modification(s): Service Bulletin No. A340-27-4142 Mod. No. 55185S18591 C. REASON (1) History During BCM (Back-up Control Module) retrofit as per Airbus SB Ref. A340-27-4142 and SAGEM Service Bulletin 418-27-010 introducing BCM PN 418-00877-102 (replacement of corroded resistances at SAGEM facilities), some attachment screws of the internal gyrometer have been found loosened within the equipment. A loose attachment of the gyrometer may induce erroneous yaw data leading to a degradation of the piloting laws when the aircraft is in back up control configuration. Investigations performed at manufacturer’s facility pointed out that screws loosening on BCM Part Number (P/N) 418-00877-100, 418-00877-101 and 418-00877-102 are due to temperature variations combined with vibrations. This scenario is only considered for aircraft with electrical rudder (post-mod 49144).

DATE: Nov 06/09 SERVICE BULLETIN No.: A340-27-4160 REVISION No.: 00 - Nov 06/09 Page: 2 5

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# @A340 SERVICE BULLETIN (2) Objective/Action This Service Bulletin is published to advise all operators of A340 enhanced aircraft fitted with electrical rudder (post-mod 49144) of the issue of SAGEM Service Bulletin No. 418-27-011. The design solution uses a positive locking device for the fixation of the gyrometer and additional locking washers for the attachment of the electronic card. These improvements under supplier responsibility (SAGEM) lead to introduce a new BCM PN 418-00877-103 amendment A. (3) Advantages Accomplishment of this Service Bulletin will contribute to ensure the reliability of the yaw data provided by the BCM. (4) Operational/Maintenance Consequences This Service Bulletin will cancel AD 2009-0153 if associated with the modification of Pedal Feel and Trim Unit (Ref OIT SE 999.0058/09/LB). Only in case of this association, aircraft dispatch with FCPC3 (PRIM 3) inoperative (MMEL 27-93-01-C) for A340-300 aircraft fitted with MOD 49144 will be restored. D. DESCRIPTION To accomplish this Service Bulletin it is necessary to : Task 274160-831-801-001: Modification (1) Remove the Back-up Control Module 42CS (2) Modify the Back-up Control Module 42CS (3) Install the Back-up Control Module 42CS E. COMPLIANCE (1) Classification RECOMMENDED (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. EASA21J.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.

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# @A340 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 274160-831-801-001: Modification Get Access 0.50 On Aircraft Remove the Back-up Control Module 42CS 1.00 Install the Back-up Control Module 42CS 1.00 Tests 0.50 Close-Up 0.50 TOTAL MANHOURS 3.50 ELAPSED TIME (HOURS) 3.50 Additional manhours related to Vendor SB; refer to: Modify the Back-up Control Module 42CS SAGEM SA Service Bulletin No. 418-27-011 H. WEIGHT AND BALANCE Not Changed I. ELECTRICAL LOAD DATA Not Changed J. REFERENCES

Aircraft Maintenance Manual (AMM) 12-34-24 27-99-34 ATA Common Support Data Dictionary (CSDD), Chapter 2 Elec. Std. Practices Manual (ESPM) 20-55-00 Service Bulletin (SB) A340-27-4142 Vendor Service Bulletin (VSB) SAGEM SA Service Bulletin No. 418-27-011 K. PUBLICATION AFFECTED

Aircraft Wiring List (AWL) Illustrated Parts Catalog (IPC) 27-98-04 27-99-34

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# @A340 SERVICE BULLETIN

L. INTERCHANGEABILITY/MIXABILITY DESCRIPTION OLD PART N ̊ NEW PART N ̊ INT MIXABILITY SEE NOTES BCM-Backup Control Module 418-00877-102 418-00877-103 01 Not Applicable NOTE: For definitions of interchangeability codes in column INT., refer to ATA Common Support Data Dictionary (CSDD), Chapter 2. M. SPARES None

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# @A340 SERVICE BULLETIN

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# @A340 SERVICE BULLETIN

2. MATERIAL INFORMATION **CONF ALL A. MATERIAL - PRICE AND AVAILABILITY (1) Procurement Addresses Equipment BFEA01 This Service Bulletin is the subject of an AIRBUS monitored retrofit campaign.Vendor parts are to be procured from : SAGEM SA Defense and Security Division Massy Palaiseau Plant TECHNICAL PUBLICATIONS 11, rue Ampere 91344 MASSYCedex FRANCE Telefax : +33(0) 1 69 19 67 00 Telex : 602164F SITA : PARIMCR (2) Price and Availability Refer to the SAGEM SA Service Bulletin No. 418-27-011 for the equipment modification sales terms. B. INDUSTRY SUPPORT INFORMATION For the organisation of this retrofit, operators are kindly requested to contact AIRBUS retrofit management department : AIRBUS CUSTOMER SERVICES DIRECTORATE 1 Rond Point Maurice Bellonte 31707 BLAGNAC CEDEX France Tel : (33) 5 67 19 06 22 E-mail : monitored.retrofit@airbus.com Fax : (33) 5 61 93 27 45 Modification of parts/equipment is at no charge for the operator. The man-hours indicated in this Service Bulletin will remain at the operators’ cost. C. LIST OF COMPONENTS No Kit D. LIST OF MATERIALS - OPERATOR SUPPLIED (1) Consumable Materials None

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# @A340 SERVICE BULLETIN (2) Components None (3) Equipment Equipment BFEA01 ITEM NEW PART N ̊ QTY (UM) KEYWORD ITEM OLD PART N ̊ INT SEE NOTES 418-00877-103 1 BCM 418-00877-102 01 NOTE: For definitions of interchangeability codes in column INT., refer to ATA Common Support Data Dictionary (CSDD), Chapter 2. E. PARTS TO BE RE-IDENTIFIED BY OPERATOR None F. TOOLING None

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# @A340 SERVICE BULLETIN

3. ACCOMPLISHMENT INSTRUCTIONS Task 274160-831-801-001 - 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 Zone 170 Modified FIN 42CS Manpower TOTAL MANHOURS 3.50 ELAPSED TIME (HOURS) 3.50 Additional manhours related to Vendor SB; refer to: SAGEM SA Service Bulletin No. 418-27-011 A. GENERAL (1) Subtask 274160-839-001-001 - Administrative Manpower Resources Skills NON SPECIFIC Write in the applicable aircraft records that you have done all the work given in this Service Bulletin.

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# @A340 SERVICE BULLETIN

B. PREPARATION (1) Subtask 274160-941-001-001 - Job Set-up Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) Task 12-34-24-860-802 Task 27-99-34-000-801 (a) Make sure that the aircraft is electrically grounded (Refer to AMM Task 12-34-24-860-802) (b) Do the preparation procedure as specified in the removal of the back-up control module (BCM) (42CS), (Refer to AMM Task 27-99-34-000-801). C. PROCEDURE (1) Subtask 274160-900-001-001 - Remove the Back-up Control Module 42CS Work Zones and Access Panels Zone Access/Work location 170 Manpower Resources Manhours 1.00 Minimum number of person 1 Subtask elapsed time 1.00 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) Task 27-99-34-000-801 (a) Remove the BCM 42CS (Refer to AMM Task 27-99-34-000-801) : FIN 42CS 1 BCM-Backup Control Module 418-00877-102 (2) Subtask 274160-831-001-001 - Modify the Back-up Control Module 42CS References Vendor Service Bulletin (VSB) SAGEM SA 418-27-011 (a) Modify the BCM 42CS (Refer to SAGEM SA Service Bulletin No. 418-27-011).

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# @A340 SERVICE BULLETIN (3) Subtask 274160-900-002-001 - Install the Back-up Control Module 42CS Work Zones and Access Panels Zone Access/Work location 170 Manpower Resources Manhours 1.00 Minimum number of person 1 Subtask elapsed time 1.00 Skills NON SPECIFIC Material necessary to do the job Equipment BFEA01 ITEM NEW PART N ̊ QTY (UM) KEYWORD SEE NOTES 418-00877-103 1 BCM References Aircraft Maintenance Manual (AMM) Task 27-99-34-000-801 (a) Install the BCM 42CS (Refer to AMM Task 27-99-34-000-801) : FIN 42CS 1 BCM-Backup Control Module 418-00877-103
D. TEST (1) Subtask 274160-700-001-001 - Testing Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) Task 27-99-34-400-801 (a) Job set-up : 1 Remove the safety clips and tags and close the circuit breakers as specified after the installation of the BCM (42CS), (Refer to AMM Task 27-99-34-400-801). (b) Procedure 1 Do the test procedure as specified after the installation of the BCM (42CS), (Refer to AMM Task 27-99-34-400-801).

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# @A340 SERVICE BULLETIN

E. CLOSE-UP (1) Subtask 274160-942-001-001 - Close-up Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) Task 27-99-34-400-801 (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 installation of the BCM (42CS), (Refer to AMM Task 27-99-34-400-801). (c) Restore the systems and aircraft to normal operating condition.

DATE: Nov 06/09 SERVICE BULLETIN No.: A340-27-4160 REVISION No.: 00 - Nov 06/09 Page: 12 5

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# @A340 SERVICE BULLETIN REPORTING SHEET

### TITLE: FLIGHT CONTROLS - ELECTRICAL BACK-UP - INSTALL NEW BACKUP CONTROL MODULE (BCM) ON ENHANCED A340. MODIFICATION No.: 58118S30423 Please complete the appropriate item (A or B): A - SB WILL BE embodied YES/NO (if NO please comment) If YES, aircraft concerned (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 FAX: (+33) 5 61 93 28 06 e-mail: sb.reporting@airbus.com or via your Resident Customer Support Office. Alternatively, SB lists via letters or fax are also accepted.

DATE: Nov 06/09 SERVICE BULLETIN No.: A340-27-4160 REVISION No.: 00 - Nov 06/09 Page: 1 5

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# @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 FAX : (33) 5 61 93 42 51 Or via your Resident Customer Support Office.

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