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@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 - THSA - INSPECTION OF THE BALL SCREW
ASSY FOR INTEGRITY OF THE PRIMARY AND SECONDARY LOAD PATH MODIFICATION No.: None This page transmits Revision No.09 of Service Bulletin No.A340-27-4107
ADDITIONAL WORK **CONF ALL No additional work is required by this revision for aircraft modified by any previous issue.
REASON Revision No. 09 issued to add the Detailed Inspection of the Checkable Shear-Pin (CSP).
CHANGES The main changes of this revision are:
- Lubrication of the THSA after Inspection added,
- TASK 274107-833-801 001 Replacement of the THSA added,
- TASK 274107-832-802 001 Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-700/710 or PN 47172-500/510/520/530 created,
- TASK 274107-833-802 001 Replacement of the CSP created,
- Flow Charts updated,
- Fig. A-FBBAA created,
- Inspection Service Bulletin (ISB) applicability extended to THSA 47147-XXX family,
- Minor changes applied.
NOTE : Revised text and layout changes of this revision are not identified with revision bars.
DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 1 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET
SUMMARY
MODIFICATIONS Minor editorial or document structure change N
REASON/DESCRIPTION/OPERATIONAL
CONSEQUENCES Minor editorial or document structure change N
GENERAL EVALUATION Minor editorial or document structure change N
MATERIAL PRICE INFORMATION Minor editorial or document structure change N Minor editorial or document structure change N
EFFECTIVITY Minor editorial or document structure change N
CONCURRENT REQUIREMENTS Minor editorial or document structure change N
REFERENCES / REPERCUSSIONS Minor editorial or document structure change N
NATURE OF THE WORK Minor editorial or document structure change N
MANPOWER Minor editorial or document structure change N Minor editorial or document structure change N
APPENDICES Minor editorial or document structure change N Fig. A-FSAAA Minor editorial or document structure change N Fig. A-FSAAA Sheet 01 Minor editorial or document structure change N Fig. A-FSAAB Minor editorial or document structure change N Fig. A-FSAAB Sheet 01 Minor editorial or document structure change N
PLANNING INFORMATION
EFFECTIVITY Minor editorial or document structure change N Configuration definition Minor editorial or document structure change N CONF 001 Minor editorial or document structure change N CONF 002 Minor editorial or document structure change N Material Effectivity Minor editorial or document structure change N Minor editorial or document structure change N Minor editorial or document structure change N
CONCURRENT REQUIREMENTS Minor editorial or document structure change N REASON Minor editorial or document structure change N History Minor editorial or document structure change N Objective/Action Minor editorial or document structure change N Advantages Minor editorial or document structure change N Operational/Maintenance Consequences Minor editorial or document structure change N
DESCRIPTION Minor editorial or document structure change N
COMPLIANCE Minor editorial or document structure change N Classification Minor editorial or document structure change N Accomplishment Timescale Minor editorial or document structure change N Accomplishment Timescale Minor editorial or document structure change N
APPROVAL Minor editorial or document structure change N Minor editorial or document structure change N
MANPOWER Minor editorial or document structure change N DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 2 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET Minor editorial or document structure change N Minor editorial or document structure change N
WEIGHT AND BALANCE Minor editorial or document structure change N
ELECTRICAL LOAD DATA Minor editorial or document structure change N
REFERENCES Minor editorial or document structure change N Minor editorial or document structure change N Minor editorial or document structure change N
PUBLICATION AFFECTED Minor editorial or document structure change N Minor editorial or document structure change N
INTERCHANGEABILITY/MIXABILITY Minor editorial or document structure change N SPARES Minor editorial or document structure change N
MATERIAL INFORMATION
MATERIAL - PRICE AND AVAILABILITY Minor editorial or document structure change N Procurement Addresses Minor editorial or document structure change N Price and Availability Minor editorial or document structure change N
INDUSTRY SUPPORT INFORMATION Minor editorial or document structure change N
LIST OF COMPONENTS Minor editorial or document structure change N
LIST OF MATERIALS - OPERATOR
SUPPLIED Minor editorial or document structure change N Consumable Materials Minor editorial or document structure change N Components Minor editorial or document structure change N Equipment Minor editorial or document structure change N Equipement BFEA01 Minor editorial or document structure change N
PARTS TO BE RE-IDENTIFIED BY
OPERATOR Minor editorial or document structure change N
TOOLING Minor editorial or document structure change N Tooling - Price and Availability Minor editorial or document structure change N Tools Minor editorial or document structure change N Special Tools Minor editorial or document structure change N
ACCOMPLISHMENT INSTRUCTIONS TASK 274107- 832-801-001-Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-500 or PN 47172-300 Minor editorial or document structure change N Task associated data - 001 Minor editorial or document structure change N Task associated data - 002 Minor editorial or document structure change N Subtask 274107-910-001-001 Minor editorial or document structure change N Subtask 274107-839-001-001 Minor editorial or document structure change N Subtask 274107-941-001-001 Minor editorial or document structure change N Subtask 274107-832-001-001 Minor editorial or document structure change N Subtask 274107-833-001-001 Minor editorial or document structure change N Subtask 274107-942-001-001 Minor editorial or document structure change N DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 3 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET TASK 274107- 832-802-001-Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-700/710 or PN 47172-500/510/520/530 Minor editorial or document structure change N Task associated data - 001 Minor editorial or document structure change N Task associated data - 002 Minor editorial or document structure change N Subtask 274107-910-002-001 Minor editorial or document structure change N Subtask 274107-839-002-001 Minor editorial or document structure change N Subtask 274107-941-003-001 Minor editorial or document structure change N Subtask 274107-832-002-001 Minor editorial or document structure change N Subtask 274107-832-003-001 Minor editorial or document structure change N Subtask 274107-833-002-001 Minor editorial or document structure change N Subtask 274107-942-003-001 Minor editorial or document structure change N TASK 274107- 833-801-001-Replacement of the THSA Minor editorial or document structure change N Task associated data - 001 Minor editorial or document structure change N Task associated data - 002 Minor editorial or document structure change N Subtask 274107-910-004-001 Minor editorial or document structure change N Subtask 274107-839-004-001 Minor editorial or document structure change N Subtask 274107-910-004-001 Minor editorial or document structure change N Subtask 274107-839-004-001 Minor editorial or document structure change N Subtask 274107-941-002-001 Minor editorial or document structure change N Subtask 274107-941-002-001 Minor editorial or document structure change N Subtask 274107-900-001-001 Minor editorial or document structure change N Subtask 274107-900-001-002 Minor editorial or document structure change N Subtask 274107-700-001-001 Minor editorial or document structure change N Subtask 274107-700-001-001 Minor editorial or document structure change N Subtask 274107-942-002-001 Minor editorial or document structure change N Subtask 274107-942-002-002 Minor editorial or document structure change N TASK 274107- 833-802-001-Replacement of the CSP Minor editorial or document structure change N Task associated data - 001 Minor editorial or document structure change N Task associated data - 002 Minor editorial or document structure change N Subtask 274107-910-003-001 Minor editorial or document structure change N Subtask 274107-839-003-001 Minor editorial or document structure change N Subtask 274107-941-004-001 Minor editorial or document structure change N Subtask 274107-900-002-001 Minor editorial or document structure change N Subtask 274107-700-002-001 Minor editorial or document structure change N Subtask 274107-942-004-001 Minor editorial or document structure change N Fig. A-FBAAA Minor editorial or document structure change N Fig. A-FBAAA Sheet 01 Minor editorial or document structure change N Fig. A-FBAAB Minor editorial or document structure change N DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 4 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET Fig. A-FBAAB Sheet 01 Minor editorial or document structure change N Fig. A-FBBAA Minor editorial or document structure change N Fig. A-FBBAA Sheet 01 Minor editorial or document structure change N Fig. A-FBBAA Sheet 02 Minor editorial or document structure change N Fig. A-FFAAA Minor editorial or document structure change N Fig. A-FFAAA Sheet 01 Minor editorial or document structure change N Fig. A-FFAAB Minor editorial or document structure change N Fig. A-FFAAB Sheet 01 Minor editorial or document structure change N Fig. A-FRAAA Minor editorial or document structure change N Fig. A-FRAAA Sheet 01 Minor editorial or document structure change N Fig. A-FRAAB Minor editorial or document structure change N Fig. A-FRAAB Sheet 01 Minor editorial or document structure change N
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 Refer to the previous issues of AOT 27A4107.
The AOT 27A4107 was issued on May 30/02 to inform the operators about a repetitive inspection to be performed on the ball screw assy for integrity of the primary and secondary load path.
The AOT 27A4107 was revised on Jul 25/02 to provide operators with a simpler Inspection procedure and clearer GO/NOGO criteria.
Revision No. 02 was issued to supersede AOT 27A4107 Rev. 01 (dated Jul 25/02).
Revision No. 03 was issued to add the inspection of the screw shaft and to correct the AMM references.
Revision No. 04 was issued to extend the effectivity and to introduce minor changes.
Revision No. 05 was issued to :
correct the AMM reference, add inspection procedure for RH THS/THSA lower attachment, change inspection procedure from THS/THSA lower attachment to LH THSA.
Revision No. 06 was issued to :
extend the effectivity up to MSN 0668, DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 5 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
REVISION TRANSMITTAL SHEET delete the aircraft MSN 0289 from the effectivity, update the preparation para.
Revision No. 07 was issued to update the Effectivity.
Revision No. 08 is issued to divide this Service Bulletin into :
Config. 01 valid for aircraft without Serv ice Bulletin No. A340- 27-4136 (THS A PN 47172-XXX) accomplished.
Config. 02 valid for aircraft with Service Bulletin No. A340-27-4136 accomplished and without Service Bulletin No. A340-92-4056 accomplished.
REVISION SEQUENCE ORIGINAL: May 30/02 REVISION No.: 02 - Sep 23/02 REVISION No.: 03 - Dec 04/02 REVISION No.: 04 - Jun 20/03 REVISION No.: 05 - Dec 08/03 REVISION No.: 06 - Dec 16/05 REVISION No.: 07 - Mar 16/07 REVISION No.: 08 - Dec 06/07 REVISION No. : 09 - Mar 29/16 DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 6 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@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 - THSA - INSPECTION OF THE BALL SCREW
ASSY FOR INTEGRITY OF THE PRIMARY AND SECONDARY LOAD PATH **CONF ALL
MODIFICATIONS None
REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES The Trimmable Horizontal Stabilizer Actuator (THSA) is composed of a ball nut, which forms the primary load path and a threaded nut as a secondary load path. Both run on the screw shaft. In case of failure of the primary load path, loads are transferred to the secondary one. 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 the secondary nut does not lock the THSA after few movements as expected under certain cyclic load conditions but c ontinues to operate with high friction which results in damaging 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 damaging the screw and secondary nut and, in extreme cases, in failure of the actuator.
This Service Bulletin introduces a repetitive deta iled visual inspection of th e THSA ball screw assy, a check of the gap between the secondary nut tenons and the transfer plates with a feeler gage or a detailed inspection of the checkable shear-pins.
The accomplishment of this Service Bulletin will ensure the reliable function of the THSA.
The Operational/Maintenance Consequences of this Service Bulletin are covered by the update of the affected publications detailed in "PLANNING INFORMATION".
DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 1 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY Installation of THSA fitted with Checkable Shear-Pin (PN 47147-700/710 or PN 47172-500/510/520/530) and associated to electrical harness (MOD No 52269D44449 or MOD No 52269D44450 and MOD No 56056C10650 embodiment or Service Bulletin No A340-92-4056 accomplishment) is a terminating action and cancels the requirements of the Inspection Service Bulletin No A340-27-4107.
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 NO NOTE
(1) : Service Bulletin must be accomplished.
MATERIAL PRICE INFORMATION **CONF 001 No Material **CONF 002
MATERIAL PRICE INFORMATION TABLE
MATERIAL SET
QTY PER A/C
PRICE PER
A/C (USD)
MAIN PARTS Equipment BFEA01 1 See SB CSP
EFFECTIVITY **CONF ALL This Service Bulletin is applicable to this (these) operator(s) :
06Y 15R 31V 39N 41N 74W 83V 98W 98X ABD AFR AIB ALD ALK ARG BOE CAL CPA DGA DLH F2I FIN G8E GAF HFM HFY IBE IRC IRM KAC M3R MAU MDG MRJ O2X PAL PUE QAF ROI S3R SAA SAS SFB SLM SWR TAP THT THY UAE VCV
CONCURRENT REQUIREMENTS None
REFERENCES / REPERCUSSIONS TFU
27.44.51.008 OEB None AOT 27A4107 SIL None ISI
27.40.00014
LINE MAINTENANCE AFFECTED No DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 2 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY
LIFE LIMIT None
NATURE OF THE WORK
AIRCRAFT YES
EQUIPMENT YES HARD NO SOFT NO OBRM NO
MANPOWER **CONF 001 Task 274107-832-801-001: Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-500 or PN 47172-300
TOTAL MANHOURS
6.00
ELAPSED TIME (HOURS)
6.00 Task 274107-832-802-001: Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-700/710 or PN 47172-500/510/520/530
TOTAL MANHOURS
0.00 Task 274107-833-801-001: Replacement of the THSA
TOTAL MANHOURS
23.00
ELAPSED TIME (HOURS)
14.00 Task 274107-833-802-001: Replacement of the CSP
TOTAL MANHOURS
0.00 **CONF 002 Task 274107-832-801-001: Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-500 or PN 47172-300
TOTAL MANHOURS
0.00 Task 274107-832-802-001: Detailed Inspection of the THSA Ball Screw Assy of the THSA PN 47147-700/710 or PN 47172-500/510/520/530
TOTAL MANHOURS
6.50
ELAPSED TIME (HOURS)
5.00 Task 274107-833-801-001: Replacement of the THSA
TOTAL MANHOURS
23.00
ELAPSED TIME (HOURS)
14.00 Task 274107-833-802-001: Replacement of the CSP
TOTAL MANHOURS
5.50
ELAPSED TIME (HOURS)
5.50 DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 3 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY
APPENDICES **CONF ALL None DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 4 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY **CONF 001
BALL NUT ASSY
TO BE VISUALLY
INSPECTED
GAP TO BE
MEASURED FR87 FR80 , Z311 Z312 B B C A 312AR A Z300 C F_SB_274107_5_SAAA_01_00 Figure A-FSAAA - Sheet 01 DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 5 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.
@A340
SERVICE BULLETIN
SUMMARY **CONF 002 Z300 FR87 FR80 , Z311 Z312 C A B B C
BALL NUT ASSY
TO BE VISUALLY
INSPECTED
CHECKABLE SHEAR
PIN TO BE
INSPECTED
CHECKABLE SHEAR
PIN TO BE
INSPECTED 312ARA F_SB_274107_5_SAAB_01_00 Figure A-FSAAB - Sheet 01 DATE: May 30/02 SERVICE BULLETIN No.: A340-27-4107 REVISION No.: 09 - Mar 29/16 Page: 6 5 Printed in FRANCE © AIRBUS S.A.S. 2007. All rights reserved.