# @A310 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. 

# MANDATORY MANDATORY MANDATORY
ATA SYSTEM: 27 

### TITLE: FLIGHT CONTROLS - HORIZONTAL STABILIZER ACTUATOR - INSPECTION OF HSA NO BACK BRAKE DISKS **CONF ALL MODIFICATIONS None REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES During endurance qualification tests on other AIRBUS Program Trimmable Horizontal Stabiliser Actuator (THSA), a partial loss of No-Back Brake (NBB) efficiency was identified. Due to similarity of design, same tests were initiated by the supplier UTAS on the Wide Body HSA sampled from the field. Subject tests confirmed that the A300-600, A300F4-608ST and A310 HSA Part Numbers 47142-403, 47142-413, 47142-414 and 47142-423 are also affected by this partial loss of NBB efficiency. Investigations have identified that a polishing and an auto-contamination by carbon particles of the carbon friction disk surface are at the origin of this issue. This auto-contamination leads to a partial loss of the carbon friction disks efficiency. The partial loss of the NBB efficiency is not detectable by aircraft systems. In case of power gear train not able to keep the ball screw in its last commended position, the loss of NBB efficiency can potentially lead to an uncommanded movement of the THS under specific aerodynamic loads. The phenomenon of polishing and auto-contamination of the carbon friction disks is confirmed to be an ageing / endurance issue. A new hard limit of the NBB carbon disks leading to HSA periodic maintenance is set to 14600 flight cycles. This Inspection Service Bulletin (ISB) requires to: - check the HSA PN/SN,

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 1 5

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# @A310 SERVICE BULLETIN SUMMARY - determine HSA current time from first installation on aeroplane and relevant FC and FH or last NBB disks replacement whichever is later, - check subject data against the compliance time for NBB disks replacement published through this ISB, - schedule the appropriate time frame for HSA removal and replacement by a serviceable unit. After installation of serviceable HSA, operator must repeat the inspection in order to plan the next HSA NBB disks replacement. NOTE : In the case the in-service history of the HSA is not known or partially missing, the operator shall refer to the SIL 05-008 for estimation of FC and FH. The use of conclusive maintenance records is allowed to positively determine the HSA in-service history. Accomplishment of this Service Bulletin permits scheduling the next HSA maintenance for NBB disks replacement. 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 ETOPS AFFECTED NO STRUCTURAL LIFE EXTN NO VENDOR SB INVOLVED NO NOTE (1) : Service Bulletin must be accomplished. MATERIAL PRICE INFORMATION No Material EFFECTIVITY This Service Bulletin is applicable to this (these) operator(s) :

18T 19U 40T 50W 58X 82Z 83V 85Z 98W 99Y AFG BBC CFC DGA F2I FDX GAF HFY IRA IRM IYE K1P KAC KZU PCA PIA QAF R1T RJA ROT RZO SGX SUD THY TSC UBD UZB WHT CONCURRENT REQUIREMENTS None REFERENCES / REPERCUSSIONS TFU 27.44.00.014 OEB None AOT None SIL SIL 05-008 LINE MAINTENANCE AFFECTED No DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 2 5

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# @A310 SERVICE BULLETIN SUMMARY
LIFE LIMIT YES OTHER OIT 999.0075/13 NATURE OF THE WORK AIRCRAFT YES EQUIPMENT YES HARD NO SOFT NO OBRM NO MANPOWER Task 272106-832-801-001: General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) TOTAL MANHOURS 2.50 ELAPSED TIME (HOURS) 2.50 Task 272106-833-801-001: Repair TOTAL MANHOURS 24.00 ELAPSED TIME (HOURS) 12.00 APPENDICES None

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 3 5

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# @A310 SERVICE BULLETIN SUMMARY

**CONF ALL



### A FR87

FR80 

### B

Z310

HORIZONTAL



## B 312AR



## A

STABILIZER ACTUATOR (HSA) TO BE INSPECTED 35CB

B_SB_272106_5_SAAA_01_00 Figure A-FSAAA - S heet 01

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 4 5

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# @A310 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



# MANDATORY MANDATORY MANDATORY
ATA SYSTEM: 27 

### TITLE: FLIGHT CONTROLS - HORIZONTAL STABILIZER ACTUATOR - INSPECTION OF HSA NO BACK BRAKE DISKS 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 NOTE : This Service Bulletin is only applicable to HSA PN 47142-403, PN 47142-413, PN 47142-414 and PN 47142-423. (1) Models 310-203 310-221 310-222 310-304 310-308 310-322 310-324 310-325 (2) Effectivity by MSN 0162 0230 0237 0245 0248 0267 0278 0281 0283 0331 0356 0362 0364 0369 0378 0394 0399 0407 0413 0418-0419 0421-0422 0425 0431 0434 0436-0437 0439 0441 0444-0447 0449 0452 0456-0458 0467 0472-0473 0478 0480 0482-0484 0488-0492 0494-0500 0503 0519-0520 0522-0524 0526-0527 0537 0539 0545 0547 0549-0552 0562 0564-0565 0567-0568 0571 0574 0576 0585-0588 0590-0595 0597 0599-0600 0620 0622 0624 0636 0644 0646-0649 0651 0653 0656 0658 0660-0661 0663 0667 0671-0672 0674 0676 0678 0682 0687 0689 0691 0700 0702 0704 0706

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 1 5

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# @A310 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 18T 0473 19U 0399 40T 0413 50W 0498 58X 0431 82Z 0550 0551 83V 0407 85Z 0527 98W 0495 99Y 0489 AFG 0496 0497 BBC 0594 0700 CFC 0425 0441 0444 0446 0482 DGA 0418 0421 0422 F2I 0491 0520 FDX 0162 0230 0237 0245 0248 0267 0278 0281 0283 0331 0356 0362 0364 0369 0378 0394 0439 0449 0452 0456 0457 0458 0467 0492 0500 0539 0549 0552 0593 GAF 0434 0484 0503 0522 0523 HFY 0565 IRA 0436 0671 IRM 0488 0499 0524 0526 0537 0547 0564 0567 0586 0595 0620 IYE 0568 0702 0704 K1P 0648 KAC 0647 0649 0663 KZU 0592 0622 0646 PCA 0419 PIA 0585 0587 0590 0653 0656 0660 0676 0678 0682 0687 0689 0691 QAF 0667 R1T 0591 RJA 0445 0490 ROT 0636 0644 RZO 0571 0624 0651 0661 SGX 0519 0562 SUD 0437 THY 0478 0480 TSC 0447 0472 0483 0545 0588 0597 0599 0600 0658 UBD 0672 0674 UZB 0574 0576 0706 WHT 0494 DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 2 5

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# @A310 SERVICE BULLETIN (4) Configuration by MSN MSN CONFIGURATION 0162 0230 0237 0245 0248 0267 0278 0281 0283 0331 0356 0362 0364 0369 0378 0394 0399 0407 0413 0418 0419 0421 0422 0425 0431 0434 0436 0437 0439 0441 0444 0445 0446 0447 0449 0452 0456 0457 0458 0467 0472 0473 0478 0480 0482 0483 0484 0488 0489 0490 0491 0492 0494 0495 0496 0497 0498 0499 0500 0503 0519 0520 0522 0523 0524 0526 0527 0537 0539 0545 0547 0549 0550 0551 0552 0562 0564 0565 0567 0568 0571 0574 0576 0585 0586 0587 0588 0590 0591 0592 0593 0594 0595 0597 0599 0600 0620 0622 0624 0636 0644 0646 0647 0648 0649 0651 0653 0656 0658 0660 0661 0663 0667 0671 0672 0674 0676 0678 0682 0687 0689 0691 0700 0702 0704 0706 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 No Material Set B. CONCURRENT REQUIREMENTS None C. REASON (1) History During endurance qualification tests on other AIRBUS Program Trimmable Horizontal Stabiliser Actuator (THSA), a partial loss of No-Back Brake (NBB) efficiency was identified. Due to similarity of design, same tests were initiated by the supplier UTAS on the Wide Body HSA sampled from the field. Subject tests confirmed that the A300-600, A300F4-608ST and A310 HSA Part Numbers 47142-403, 47142-413, 47142-414 and 47142-423 are also affected by this partial loss of NBB efficiency. Investigations have identified that a polishing and an auto-contamination by carbonparticles of the carbon friction disk surface are at the origin of this issue. This autocontamination leads to a partial loss of the carbon friction disks efficiency. The partial loss of the NBB efficiency is not detectable by aircraft systems. In case of power gear train not able to keep the ball screw in its last commended position, the loss of NBB efficiency can potentially lead to an uncommanded movement of the THS under specific aerodynamic loads.

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 3 5

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# @A310 SERVICE BULLETIN The phenomenon of polishing and auto-contamination of the carbon friction disks is confirmed to be an ageing / endurance issue. A new hard limit of the NBB carbon disks leading to HSA periodic maintenance is set to 14600 flight cycles. (2) Objective/Action This Inspection Service Bulletin (ISB) requires to: - check the HSA PN/SN, - determine HSA current time from first installation on aeroplane and relevant FC and FH or last NBB disks replacement whichever is later, - check subject data against the compliance time for NBB disks replacement published through this ISB, - schedule the appropriate time frame for HSA removal and replacement by a serviceable unit. After installation of serviceable HSA, operator must repeat the inspection in order to plan the next HSA NBB disks replacement. NOTE : In the case the in-service history of the HSA is not known or partially missing, the operator shall refer to the SIL 05-008 for estimation of FC and FH. The use of conclusive maintenance records is allowed to positively determine the HSA in-service history. (3) Advantages Accomplishment of this Service Bulletin permits scheduling the next HSA maintenance for NBB disks replacement. (4) Operational/Maintenance Consequences None D. DESCRIPTION To accomplish this Service Bulletin it is necessary to : Task 272106-832-801-001: General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) (1) Plan HSA Maintenance (FIN 35CB) Task 272106-833-801-001: Repair (1) Depending on Inspection Results, Install a Serviceable HSA

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 4 5

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# @A310 SERVICE BULLETIN
E. COMPLIANCE (1) Classification MANDATORY: Service Bulletin must be accomplished. (2) Accomplishment Timescale This Service Bulletin has been classified Mandatory. It is expected that an Airworthiness Directive (AD) published by the European Aviation Safety Agency (EASA) will be issued to confirm this classification. It is anticipated that the AD will confirm the thresholds, intervals and dates given but reference should be made to the AD for confirmation of the mandated accomplishment timescale. Table 1, Config. 001 - General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) Compliance Time Condition Action Threshold Grace period Repetitive interval All Aircraft Inspect the HSA Part Number (PN) and Serial Number (SN) (FIN 35CB) in accordance with TASK 272106-832-801 001 30 days from the issuance of this Inspection Service Bulletin (ISB) None None

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 5 5

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# @A310 SERVICE BULLETIN
Table 1, Config. 001 - General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) Compliance Time Condition Action Threshold Grace period Repetitive interval Plan the next HSAreplacement for NoBack Brake (NBB) disk replacement in accordance with SUBTASK 272106-210-001 001 And Replace the HSA by a serviceable one in accordance with TASK 272106-833-801 001 See NOTE (*) And 14600 Flight Cycles (FC) accumulated by HSA from last NBB disks replacement or since EIS when NBB disks have never been replaced - From Feb 01/16, operation of HSA with NBB disks having accumulated more than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed - From Feb 01/17, operation

of HSA with NBB disks having accumulated more than 20000 FC and less than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed - From Feb 01/19, operation

of HSA with NBB disks having accumulated more than 14600 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed None HSA in- service history available

Repeat the inspection of the HSA in accordance with TASK 272106-832-801 001 None None At each HSA replacement

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 6 5

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# @A310 SERVICE BULLETIN
Table 1, Config. 001 - General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) Compliance Time Condition Action Threshold Grace period Repetitive interval Estimate HSA FC and Flight Hours (FH) (FIN 35CB) in accordance with SUBTASK 272106-210-001 001 Before next flight None None

Plan the next HSAreplacement for NoBack Brake (NBB) disk replacement in accordance with SUBTASK 272106-210-001 001 And Replace the HSA by a serviceable one in accordance with TASK 272106-833-801 001 See NOTE (*) 14600 Flight Cycles (FC) accumulated by HSA from last NBB disks replacement or since EIS when NBB disks have never been replaced - From Feb 01/16, operation of HSA with NBB disks having accumulated more than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed - From Feb 01/17, operation

of HSA with NBB disks having accumulated more than 20000 FC and less than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed - From Feb 01/19, operation

of HSA with NBB disks having accumulated more than 14600 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed NoneHSA inservice history not available

Repeat the inspection of the HSA in accordance with TASK 272106-832-801 001 None None At each HSA replacement

NOTE (*): A serviceable HSA is a HSA whose NBB disks have not exceeded the limits identified in this ISB, since first installation on an aircraft or since last NBB disks replacement whichever is later. F. APPROVAL The technical content of this document is approved under the authority of Design Organisation Approval No. EASA.21J.031.

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 7 5

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# @A310 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 272106-832-801-001: General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) Get Access 1.00 On Aircraft Plan HSA Maintenance (FIN 35CB) 0.50 Close-Up 1.00 TOTAL MANHOURS 2.50 ELAPSED TIME (HOURS) 2.50 Task 272106-833-801-001: Repair Get Access 2.00 On Aircraft Depending on Inspection Results, Install a Serviceable HSA 18.00 Tests 2.00 Close-Up 2.00 TOTAL MANHOURS 24.00 ELAPSED TIME (HOURS) 12.00 NOTE : The minimum manhours necessary to accomplish this Service Bulletin are those for the Inspection. Depending on the inspection result, additional manhours can apply. H. WEIGHT AND BALANCE Not Changed I. ELECTRICAL LOAD DATA Not Changed J. REFERENCES

Aircraft Maintenance Manual (AMM) 06-21-00 06-31-53 24-00-00 27-44-11 Elec. Std. Practices Manual (ESPM) 20-55-00 Service Information Letter (SIL) 05-008 DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 8 5

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# @A310 SERVICE BULLETIN
Airworthiness Limitation Section (ALS) Part 4 K. PUBLICATION AFFECTED Impact on scheduled maintenance: Refer to MPD L. INTERCHANGEABILITY/MIXABILITY Not Applicable M. SPARES None

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 9 5

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# @A310 SERVICE BULLETIN

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DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 10 5

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# @A310 SERVICE BULLETIN
2. MATERIAL INFORMATION **CONF ALL A. MATERIAL - PRICE AND AVAILABILITY (1) Procurement Addresses None (2) Price and Availability None B. INDUSTRY SUPPORT INFORMATION AIRBUS will not provide industry support for accomplishment of this Service Bulletin. C. LIST OF COMPONENTS No Kit D. LIST OF MATERIALS - OPERATOR SUPPLIED (1) Consumable Materials None (2) Components NOTE : To accomplish this Service Bulletin it is necessary to use the expendable parts listed in the subsequent referenced AMM task: - refer to AMM 27-44-11, Page Block 401. (3) Equipment None 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 the subsequent referenced AMM task:

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 11 5

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# @A310 SERVICE BULLETIN - refer to AMM 27-44-11, Page Block 401. (3) Special Tools None

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 12 5

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# @A310 SERVICE BULLETIN
3. ACCOMPLISHMENT INSTRUCTIONS Task 272106-832-801-001 - General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) 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. IF THERE IS CONTAMINATION, REFER TO ESPM 20-55-00. NOTE : The accomplishment instructions of this Service Bulletin include procedures given in other documents or in other sections of the Service Bulletin. When the words "refer to" are used and the operator has a procedure accepted by the local authority he belongs to, the accepted alternative procedure can be used. When the words "in accordance with" are used then the given procedure must be followed. NOTE : The access and close-up instructions, not comprising return to service tests, in this Service Bulletin do not constitute or affect the technical intent of the Service Bulletin. Operators can therefore, as deemed necessary, omit or add access and/or close-up steps to add flexibility to their maintenance operations as long as the technical intent of the Service Bulletin is met within the set parameters. NOTE : Manual titles given in the accomplishment instructions are referred to by acronyms. Refer to paragraph 1.J., References, for the definition of acronyms. NOTE : The purpose of flow charts is to supplement the information given in the Procedure and Compliance paragraphs and not to serve as the primary source for tasks or compliance times given in this Service Bulletin. NOTE : This Service Bulletin is classified mandatory or expected to be classified mandatory by an Airworthiness Directive (AD). The paragraphs 3.C. and 3.D. in these accomplishment instructions are Required for Compliance (RC) and must be done to comply with the AD. Other paragraphs are recommended and may be deviated from, done as part of other actions or done with accepted methods different from those given in the Service Bulletin, as long as the RC paragraphs can be done and the aircraft can be put back into a serviceable condition.

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 13 5

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# @A310 SERVICE BULLETIN
Task Associated Data Zone 312 Access Door 312AR Manpower TOTAL MANHOURS 2.50 ELAPSED TIME (HOURS) 2.50 A. GENERAL (1) Subtask 272106-910-001-001 - Standard Practices Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 06-21-00, Page Block 001 06-31-53, Page Block 001 (a) For the Frame (FR) identification, refer to AMM 06-31-53, Page Block 001. (b) For the identification of zones, refer to AMM 06-21-00, Page Block 001. (2) Subtask 272106-839-001-001 - 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 272106-941-001-001 - Job Set-up Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 24-00-00, Page Block 301 NOTE : There are two procedures for the HSA PN and SN identification: - check the HSA PN and/or SN in the aircraft maintenance records, - or check the HSA PN and/or SN on aircraft (if PN or SN are not known). NOTE : Do this preparation procedure, only if you check the HSA PN and/or SN on aircraft. DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 14 5

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# @A310 SERVICE BULLETIN
NOTE : The items given in this note shall be considered as the basic Aircraft configuration before you start a maintenance task: - Aircraft on the ground resting on landing gear (the ground safety locks and the wheel chocks are in position on the landing gear) - Engine shut down, thrust reversers closed and locked - Aircraft in clean configuration - Parking brake applied - Aircraft electrical network de-energized - Hydraulic systems depressurized - Access to the cockpit and cabin is available - All circuit breakers are in closed position - All controls in NORM, AUTO or OFF position (a) Make sure that the aircraft is electrically grounded, refer to AMM 24-00-00, Page Block 301. (b) Put an access platform in position at Zone 312. (c) Open the access door 312AR. (d) Put the warning notices in position in the flight compartment to tell persons not to operate the pitch controls. C. PROCEDURE (1) Subtask 272106-210-001-001 - Plan HSA Maintenance (FIN 35CB) Work Zones and Access Panels Zone Access/Work location 312 Access Door 312AR Manpower Resources Manhours 0.50 Minimum number of person 1 Subtask elapsed time 0.50 Skills AIRFRAME References Service Information Letter (SIL) 05-008 Fig. A-FBAAA Area to be inspected Sheet 01 Fig. A-FFAAA Flow Chart Sheet 01
DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 15 5

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# @A310 SERVICE BULLETIN (a) At the threshold given in PLANNING INFORMATION paragraph E.(2): Inspect the HSA PN and SN in maintenance records (no need of SUBTASK 272106-941-001 001 Job Set-up ): Refer to Fig. A-FFAAA Refer to Fig. A-FBAAA 1 If the PN and SN are known:
a If the HSA in-service history is available and HSA is serviceable: <1> Plan the HSA replacement for NBB disks replacement to be compliant with the following requirements: - From Feb 01/16, operation of HSA with NBB disks having accumulated more than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed. - From Feb 01/17, operation of HSA with NBB disks having accumulated more than 20000 FC and less than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed. - From Feb 01/19, operation of HSA with NBB disks having accumulated more than 14600 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed. <2> Within the above compliance times, replace the HSA by a serviceable one, in accordance with TASK 272106-833-801 001 Repair . NOTE : A serviceable HSA is a HSA whose NBB disks have not exceeded the limits identified in this ISB, since first installation on an aircraft or since last NBB disks replacement whichever is later. <3> Repeat the inspection at the interval given in the PLANNING INFORMATION paragraph 1 E.(2), in accordance with TASK 272106-832-801 001 General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) . b If the HSA in service history is available and HSA is not serviceable: <1> Replace the HSA by a serviceable one before next flight, in accordance with TASK 272106-833-801 001 Repair .

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 16 5

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# @A310 SERVICE BULLETIN <2> Repeat the inspection at the interval given in the PLANNING INFORMATION paragraph 1 E.(2), in accordance with TASK 272106-832-801 001 General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) .
c If the HSA in-service history is not available: <1> Estimate HSA FC and FH in accordance with SIL 05-008: <a> If the HSA is serviceable: [1] Plan the HSA replacement for NBB disks replacement to be compliant with the following requirements: - From Feb 01/16, operation of HSA with NBB disks having accumulated more than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed. - From Feb 01/17, operation of HSA with NBB disks having accumulated more than 20000 FC and less than 30000 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed. - From Feb 01/19, operation of HSA with NBB disks having accumulated more than 14600 FC since first installation on an aircraft, or since last NBB disks replacement, whichever is later, is not allowed. [2] Within the above compliance times, replace the HSA by a serviceable one, in accordance with TASK 272106-833-801 001 Repair . NOTE : A serviceable HSA is a HSA whose NBB disks have not exceeded the limits identified in this ISB, since first installation on an aircraft or since last NBB disks replacement whichever is later. [3] Repeat the inspection at the interval given in the PLANNING INFORMATION paragraph 1 E.(2), in accordance with TASK 272106-832-801 001 General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) . <b> If the HSA is not serviceable: [1] Replace the HSA by a serviceable one before next flight, in accordance with TASK 272106-833-801 001 Repair . NOTE : A serviceable HSA is a HSA whose NBB disks have not exceeded the limits
DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 17 5

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# @A310 SERVICE BULLETIN
identified in this ISB, since first installation on an aircraft or since last NBB disks replacement whichever is later. [2] Repeat the inspection at the interval given in the PLANNING INFORMATION paragraph 1 E.(2), in accordance with TASK 272106-832-801 001 General Visual Inspection of the Horizontal Stabilizer Actuator (HSA) (FIN 35CB) . D. TEST None E. CLOSE-UP (1) Subtask 272106-942-001-001 - Close-up Manpower Resources Skills NON SPECIFIC NOTE : If you intend to accomplish an associated Repair Task during the same layover period, the subsequent Close-up procedure is not necessary. (a) Make sure that the work areas are clean and clear of tools and other items of equipment. (b) Remove the warning notices from the flight compartment. (c) Close the access door 312AR. (d) Remove the access platform(s). (e) Put the aircraft back to its initial configuration.

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 18 5

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# @A310 SERVICE BULLETIN Task 272106-833-801-001 - 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. IF THERE IS CONTAMINATION, REFER TO ESPM 20-55-00. NOTE : The accomplishment instructions of this Service Bulletin include procedures given in other documents or in other sections of the Service Bulletin. When the words "refer to" are used and the operator has a procedure accepted by the local authority he belongs to, the accepted alternative procedure can be used. When the words "in accordance with" are used then the given procedure must be followed. NOTE : The access and close-up instructions, not comprising return to service tests, in this Service Bulletin do not constitute or affect the technical intent of the Service Bulletin. Operators can therefore, as deemed necessary, omit or add access and/or close-up steps to add flexibility to their maintenance operations as long as the technical intent of the Service Bulletin is met within the set parameters. NOTE : Manual titles given in the accomplishment instructions are referred to by acronyms. Refer to paragraph 1.J., References, for the definition of acronyms. NOTE : This Service Bulletin is classified mandatory or expected to be classified mandatory by an Airworthiness Directive (AD). The paragraphs 3.C. and 3.D. in these accomplishment instructions are Required for Compliance (RC) and must be done to comply with the AD. Other paragraphs are recommended and may be deviated from, done as part of other actions or done with accepted methods different from those given in the Service Bulletin, as long as the RC paragraphs can be done and the aircraft can be put back into a serviceable condition. Task Associated Data Zone 312 Modified FIN 35CB

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 19 5

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# @A310 SERVICE BULLETIN

Access Door 312AR Manpower TOTAL MANHOURS 24.00 ELAPSED TIME (HOURS) 12.00 A. GENERAL (1) Subtask 272106-910-002-001 - Standard Practices Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 06-21-00, Page Block 001 06-31-53, Page Block 001 (a) For the Frame (FR) identification, refer to AMM 06-31-53, Page Block 001. (b) For the identification of zones, refer to AMM 06-21-00, Page Block 001. (2) Subtask 272106-839-002-001 - 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 272106-941-002-001 - Job Set-up Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 24-00-00, Page Block 301 27-44-11, Page Block 401 NOTE : If you intend to accomplish this Repair Task during the same layover period as the associated Inspection, the subsequent Preparation procedure is not necessary except the Job Set-up procedure as specified in the removal of the HSA (FIN 35CB), refer to AMM 27-44-11, Page Block 401. NOTE : The items given in this note shall be considered as the basic Aircraft configuration before you start a maintenance task: - Aircraft on the ground resting on landing gear (the ground safety locks and the wheel chocks are in position on the landing gear)
DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 20 5

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# @A310 SERVICE BULLETIN - Engine shut down, thrust reversers closed and locked - Aircraft in clean configuration - Parking brake applied - Aircraft electrical network de-energized - Hydraulic systems depressurized - Access to the cockpit and cabin is available - All circuit breakers are in closed position - All controls in NORM, AUTO or OFF position (a) Make sure that the aircraft is electrically grounded, refer to AMM 24-00-00, Page Block 301. (b) Put an access platform in position at Zone 312. (c) Open the access door 312AR. (d) Put the warning notices in position in the flight compartment to tell persons not to operate the pitch controls. (e) Do the Job Set-up procedure as specified in the removal of the HSA (FIN 35CB), refer to AMM 27-44-11, Page Block 401. C. PROCEDURE (1) Subtask 272106-900-001-001 - Depending on Inspection Results, Install a Serviceable HSA Work Zones and Access Panels Zone Access/Work location 312 Access Door 312AR Manpower Resources Manhours 18.00 Minimum number of person 2 Subtask elapsed time 9.00 Skills AIRFRAME References Aircraft Maintenance Manual (AMM) 27-44-11, Page Block 401 (a) Remove the HSA: Refer to AMM 27-44-11, Page Block 401

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 21 5

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# @A310 SERVICE BULLETIN

FIN 35CB 1 HSA 47142-403 Or FIN 35CB 1 HSA 47142-413 Or FIN 35CB 1 HSA 47142-414 Or FIN 35CB 1 HSA 47142-423 (b) Install a serviceable HSA, FIN 35CB, refer to AMM 27-44-11, Page Block 401. NOTE : A serviceable HSA is a HSA whose NBB disks have not exceeded the limits identified in this ISB, since first installation on an aircraft or since last NBB disks replacement whichever is later. D. TEST (1) Subtask 272106-700-002-001 - Testing Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 27-44-11, Page Block 401 (a) Job Set-up 1 Remove the safety clips and/or tags and close/unlock the circuit breakers as specified after the installation of the HSA (FIN 35CB), refer to AMM 27-44-11, Page Block 401. (b) Procedure 1 Do the test procedure as specified after the installation of the HSA (FIN 35CB), refer to AMM 27-44-11, Page Block 401 E. CLOSE-UP (1) Subtask 272106-942-002-001 - Close-up Manpower Resources Skills NON SPECIFIC

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 22 5

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# @A310 SERVICE BULLETIN

References Aircraft Maintenance Manual (AMM) 27-44-11, Page Block 401 (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 after the installation of the HSA (FIN 35CB), refer to AMM 27-44-11, Page Block 401. (c) Remove the warning notices from the flight compartment. (d) Close the access door 312AR. (e) Remove the access platform(s). (f) Put the aircraft back to its initial configuration.

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 23 5

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# @A310 SERVICE BULLETIN

**CONF ALL

IN ACCORDANCE WITH TASK 272106

−832

−801

−001 GIVEN IN THE PLANNING INFORMATION PARAGRAPH E.(2) STABILIZER ACTUATOR (HSA) (FIN 35CB) AT THE THRESHOLD

COMPLIANCE TIMES GIVEN IN THIS SERVICE BULLETIN AND COMPLIANCE PARAGRAPHS AND NOT TO SERVE AS THE PRIMARY SOURCE FOR TASKS OR THE PURPOSE OF FLOW CHARTS IS TO SUPPLEMENT THE INFORMATION GIVEN IN THE PROCEDURE NOTE: DO A GENERAL VISUAL INSPECTION OF THE HORIZONTAL

IN ACCORDANCE WITH SUBTASK 272106

−210

−001

−001 PLAN THE NEXT HSA REPLACEMENT FOR NBB DISKS REPLACEMENT

SUBTASK 272106

−833

−801

−001 INSTALL A SERVICEABLE HSA IN ACCORDANCE WITH

GIVEN IN THE PLANNING INFORMATION PARAGRAPH E.(2) (IN ACCORDANCE WITH TASK 272106

−832

−801

−001) AT THE INTERVAL REPEAT THE INSPECTION

QUESTION ACTION FINDING

IF HISTORY IS NOT KNOWN ESTIMATE HSA FC AND FH IN ACCORDANCE WITH SIL 05

−008
REPLACEMENT WHICHEVER IS LATER IN THIS SERVICE BULLETIN, SINCE FIRST INSTALLATION ON AN AIRCRAFT OR SINCE LAST NBB DISKS A SERVICEABLE HSA IS A HSA WHOSE NBB DISKS HAVE NOT EXCEEDED THE LIMITS IDENTIFIED 01

02 SUBTASK 272106

−210

−001

−001 FLIGHT CYCLES AND FLIGHT HOURS IN ACCORDANCE WITH CHECK FOR HSA P/N AND S/N AND CHECK OR ESTIMATE HSA

01 02 WITHIN THE COMPLIANCE TIME GIVEN IN THE PLANNING INFORMATION PARAGRAPH E.(2)

B_SB_272106_5_FAAA_01_04 Figure A-FFAAA - Sheet 01 Flow Chart
DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 24 5

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# @A310 SERVICE BULLETIN

**CONF ALL



### A FR87

FR80 

### B

Z310

HORIZONTAL



## B 312AR



## A

STABILIZER ACTUATOR (HSA) TO BE INSPECTED 35CB

B_SB_272106_5_BAAA_01_00 Figure A-FBAAA - S heet 01 Area to be inspected
DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 25 5

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# @A310 SERVICE BULLETIN REPORTING SHEET 

### TITLE: FLIGHT CONTROLS - HORIZONTAL STABILIZER ACTUATOR - INSPECTION OF HSA NO BACK BRAKE DISKS 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 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: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 1 5

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# @A310 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 FAX : (33) 5 61 93 42 51 Or via your Resident Customer Support Office.

DATE: Feb 17/15 SERVICE BULLETIN No.: A310-27-2106 REVISION No.: 00 - Feb 17/15 Page: 1 5

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