# @A300-600 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. 

# MANDATORYMANDATORYMANDATORY
ATA SYSTEM: 32 

### TITLE: LANDING GEAR - NORMAL EXTENSION AND RETRACTION - INSPECTION OF NLG AND MLG SEQUENCE VALVES **CONF ALL MODIFICATIONS None REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES In the scope of the Wide Body life extension exercise, Airbus has analyzed the in-service experience feedback from Messier-Bugatti-Dowty who has reported five cases of early ruptures on levers of the Nose Landing Gear (NLG) Sequence Valve. Analysis of the root cause lead to consider that these fatigue ruptures were most probably due to initial mis-rigging and not directly linked to ageing. For the time being, even if the design of the Main Landing Gear (MLG) sequence valve lever is similar with the one of NLG sequence valve lever, no case of lever rupture has been reported on MLG sequence valve. Incorrect adjustment of the mechanical linkages can cause rupture of the sequence valve lever and subsequent potential inhibition of leg extension/retraction or interference between the Leg and Door during operation. This Service Bulletin details a one-time inspection of the control lever and correct adjustment of the control rod between Doors and NLG and MLG Sequence valves (FIN 321255, 321262, 321214 and 321215). Accomplishment of this Service Bulletin will contribute to ensure the reliability of the NLG and MLG Sequence Valves. GENERAL EVALUATION EVALUATION TABLE COMPLIANCE MANDATORY (1) CANCELS INSPECTION SB NO POTENTIAL AD YES A/C OPERATION AFFECTED NO DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300-600 SERVICE BULLETIN SUMMARY EVALUATION TABLE RELIABILITY AFFECTED NO PAX COMFORT AFFECTED NO COST SAVING NO ETOPS AFFECTED NO STRUCTURAL LIFE EXTN NO VENDOR SB INVOLVED NO NORMAL JACKING YES NOTE (1): Service Bulletin must be accomplished. NOTE: Normal Jacking is required only if functional test is required. MATERIAL PRICE INFORMATION No Material EFFECTIVITY This Service Bulletin is applicable to this (these) operator(s) :

34Z 77T 83V AAL ABD AHK AIB BCS CES F2I FDX G8E GBG IRA IRM JAL KAC KAL MNB MON MSR MXU OHY QTR RUN SUD TAR THA TMA UPS URS UZB CONCURRENT REQUIREMENTS None 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 NO SOFT NO OBRM NO MANPOWER Task 326110-832-801-001: Inspection TOTAL MANHOURS 9.50 ELAPSED TIME (HOURS) 5.00

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300-600 SERVICE BULLETIN SUMMARY APPENDICES Appendix 01 - Elapsed Time Assumption Appendix 02 - Inspection Report - NLG and MLG Sequence Valve

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 3 5

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# @A300-600 SERVICE BULLETIN SUMMARY

**CONF ALL

Z711 

### A



## A **B C** 

AREA TO BE INSPECTED

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## B **C** LH RH 321255 321262 PIN SHEARING INDICATING AREA

LEVER AREA

D_SB_326110_5_SAAA_01_03 Figure A-FSAAA - Sheet 01

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 4 5

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# @A300-600 SERVICE BULLETIN SUMMARY

**CONF ALL

Z741 Z731 

### C

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## A **B A** 

**B**

**FWD** AREA TO BE INSPECTED

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## C LH RH 321214 321215

PIN SHEARING INDICATING AREA LEVER AREA

D_SB_326110_5_SBAA_01_03 Figure A-FSBAA - Sheet 01

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 5 5

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# @A300-600 SERVICE BULLETIN SUMMARY

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# @A300-600 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



# MANDATORYMANDATORYMANDATORY
ATA SYSTEM: 32 

### TITLE: LANDING GEAR - NORMAL EXTENSION AND RETRACTION - INSPECTION OF NLG AND MLG SEQUENCE VALVES 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 (1) Models B4-603 B4-605R B4-620 B4-622 B4-622R C4-605R/F C4-620 F4-605R F4-622R (2) Effectivity by MSN 0284 0294 0301 0307 0312 0317 0321 0336 0344 0348 0351 0358 0361 0365 0380 0388 0401 0405 0408 0411 0414 0417 0423 0459-0466 0469-0470 0474 0477 0479 0505-0518 0521 0525 0529-0530 0532 0536 0540 0543 0546 0553-0561 0563 0566 0569 0572 0575 0577 0579 0581-0582 0584 0602-0615 0617-0618 0621 0623 0625-0633 0635 0637 0639 0641 0643 0645 0657 0659 0662 0664 0666 0668 0670 0673 0675 0677 0679 0681 0683 0685 0688 0692 0694 0696 0699 0701 0703 0705 0707 0709 0711 0713 0715 0717 0719 0721-0750 0752-0764 0766-0775 0777-0794 0797 0799-0841 0845-0878

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300-600 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 34Z 0685 77T 0838 83V 0423 0459 0460 0463 0466 0470 0474 0510 0511 0512 0615 0639 0675 AAL 0517 0612 ABD 0529 0557 AHK 0855 0856 0857 0858 0859 0860 0870 0871 AIB 0507 0508 0515 BCS 0621 0637 0641 0670 0679 0703 0711 0724 0729 0730 0737 0740 0753 0770 CES 0521 0525 0532 0707 0725 0732 0741 0746 0754 0763 F2I 0284 0294 0301 0307 0312 0317 0321 0336 0348 0351 0461 0518 0606 0610 0645 FDX 0358 0361 0365 0388 0417 0477 0479 0530 0536 0543 0555 0559 0572 0575 0579 0581 0611 0613 0625 0630 0633 0657 0659 0664 0668 0688 0709 0713 0715 0726 0728 0735 0736 0738 0742 0745 0748 0752 0757 0759 0760 0761 0766 0768 0769 0771 0772 0774 0777 0778 0779 0780 0781 0789 0790 0791 0792 0793 0794 0799 0800 0801 0802 0803 0804 0873 0874 0875 0876 0877 0878 G8E 0462 0465 0469 0506 0509 0513 0514 0516 GBG 0626 0643 IRA 0632 0696 0723 0727 IRM 0380 0401 0405 0408 0411 0414 0546 0553 0608 0618 0623 0701 0750 0762 0773 JAL 0602 0617 0683 0783 KAC 0344 0673 0694 0699 0719 0721 KAL 0582 0609 0627 0631 0662 0692 0731 MNB 0734 0739 0755 0756 0758 MON 0540 0556 0604 0605 MSR 0561 0607 MXU 0767 0788 0797 0836 0837 OHY 0584 0603 0744 0747 0749 0764 QTR 0554 0560 0614 RUN 0677 0743 SUD 0666 0775 TAR 0505 0558 0563 THA 0464 0566 0569 0577 0628 0629 0635 0681 0705 0782 0784 0785 0786 0787 TMA 0872

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# @A300-600 SERVICE BULLETIN
OPERATOR MSN UPS 0805 0806 0807 0808 0809 0810 0811 0812 0813 0814 0815 0816 0817 0818 0819 0820 0821 0822 0823 0824 0825 0826 0827 0828 0829 0830 0831 0832 0833 0834 0835 0839 0840 0841 0845 0846 0847 0848 0849 0850 0851 0852 0853 0854 0861 0862 0863 0864 0865 0866 0867 0868 0869 URS 0733 UZB 0717 0722 (4) Configuration by MSN MSN CONFIGURATION 0284 0294 0301 0307 0312 0317 0321 0336 0344 0348 0351 0358 0361 0365 0380 0388 0401 0405 0408 0411 0414 0417 0423 0459 0460 0461 0462 0463 0464 0465 0466 0469 0470 0474 0477 0479 0505 0506 0507 0508 0509 0510 0511 0512 0513 0514 0515 0516 0517 0518 0521 0525 0529 0530 0532 0536 0540 0543 0546 0553 0554 0555 0556 0557 0558 0559 0560 0561 0563 0566 0569 0572 0575 0577 0579 0581 0582 0584 0602 0603 0604 0605 0606 0607 0608 0609 0610 0611 0612 0613 0614 0615 0617 0618 0621 0623 0625 0626 0627 0628 0629 0630 0631 0632 0633 0635 0637 0639 0641 0643 0645 0657 0659 0662 0664 0666 0668 0670 0673 0675 0677 0679 0681 0683 0685 0688 0692 0694 0696 0699 0701 0703 0705 0707 0709 0711 0713 0715 0717 0719 0721 0722 0723 0724 0725 0726 0727 0728 0729 0730 0731 0732 0733 0734 0735 0736 0737 0738 0739 0740 0741 0742 0743 0744 0745 0746 0747 0748 0749 0750 0752 0753 0754 0755 0756 0757 0758 0759 0760 0761 0762 0763 0764 0766 0767 0768 0769 0770 0771 0772 0773 0774 0775 0777 0778 0779 0780 0781 0782 0783 0784 0785 0786 0787 0788 0789 0790 0791 0792 0793 0794 0797 0799 0800 0801 0802 0803 0804 0805 0806 0807 0808 0809 0810 0811 0812 0813 0814 0815 0816 0817 0818 0819 0820 0821 0822 0823 0824 0825 0826 0827 0828 0829 0830 0831 0832 0833 0834 0835 0836 0837 0838 0839 0840 0841 0845 0846 0847 0848 0849 0850 0851 0852 0853 0854 0855 0856 0857 0858 0859 0860 0861 0862 0863 0864 0865 0866 0867 0868 0869 0870 0871 0872 0873 0874 0875 0876 0877 0878 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 DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 3 5

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# @A300-600 SERVICE BULLETIN
C. REASON (1) HistoryIn the scope of the Wide Body life extension exercise, Airbus has analyzed the inservice experience feedback from Messier-Bugatti-Dowty who has reported five cases of early ruptures on levers of the Nose Landing Gear (NLG) Sequence Valve. Analysis of the root cause lead to consider that these fatigue ruptures were most probably due to initial mis-rigging and not directly linked to ageing. For the time being, even if the design of the Main Landing Gear (MLG) sequence valve lever is similar with the one of NLG sequence valve lever, no case of lever rupture has been reported on MLG sequence valve. Incorrect adjustment of the mechanical linkages can cause rupture of the sequence valve lever and subsequent potential inhibition of leg extension/retraction or interference between the Leg and Door during operation. (2) Objective/Action This Service Bulletin details a one-time inspection of the control lever and correct adjustment of the control rod between Doors and NLG and MLG Sequence valves (FIN 321255, 321262, 321214 and 321215). (3) Advantages Accomplishment of this Service Bulletin will contribute to ensure the reliability of the NLG and MLG Sequence Valves. (4) Operational/Maintenance Consequences None D. DESCRIPTION To accomplish this Service Bulletin it is necessary to : Task 326110-832-801-001: Inspection (1) Do a Detailed Inspection of the NLG Sequence Valve lever and the Pin shearing indicating area (2) Do a Detailed Inspection of the MLG Sequence Valve lever and the Pin shearing indicating area (3) Do a Detailed Inspection of the adjustment of the control rod between Door and NLG Sequence Valve (4) Do a Detailed Inspection of the adjustment of the control rod between Doors and MLG Sequence Valve (5) Adjust the control rod between Doors and the NLG Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 4 5

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# @A300-600 SERVICE BULLETIN (6) Adjust the control rod between Doors and the MLG Sequence Valve (7) Install a Serviceable NLG Sequence Valve and Lever (8) Install a Serviceable MLG Sequence Valve and Lever E. COMPLIANCE (1) Classification MANDATORY: Service Bulletin must be accomplished. (2) Accomplishment Timescale Table 1: Accomplishment Timescale Table Compliance time Condition Action Threshold (whichever occurs first) Grace period (whichever occurs first) Repetitive interval

All aircraft Apply SUBTASK 326110-832-001 001 Do a Detailed Inspection of the NLG Sequence Valve lever and the Pin shearing indicating area and apply SUBTASK 326110-832-002 001 Do a Detailed Inspection of the MLG Sequence Valve lever and the Pin shearing indicating area At the next maintenance opportunity after SB receipt 4,000 FC/6,000 FH/30 months None

Damage found Apply SUBTASK 326110-833-003 001 Install a Serviceable NLG Sequence Valve and Lever and/or apply SUBTASK 326110-833-004 001 Install a Serviceable MLG Sequence Valve and Lever Before next flight None None

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 5 5

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# @A300-600 SERVICE BULLETIN
Table 1: Accomplishment Timescale Table Compliance time Condition Action Threshold (whichever occurs first) Grace period (whichever occurs first) Repetitive interval

No damage found Apply SUBTASK 326110-832-003 001 Do a Detailed Inspection of the adjustment of the control rod between Door and NLG Sequence Valve and/or apply SUBTASK 326110-832-004 001 Do a Detailed Inspection of the adjustment of the control rod between Doors and MLG Sequence Valve Before next flight None None

Possible to insert the rigging pin(s) freely No further action None None None

Not possible to insert the rigging pin(s) freely and Possible to insert a pin of 7.1 mm (0,279 in) See note (*) Apply SUBTASK 326110-833-005 001 Adjust the control rod between Doors and the NLG Sequence Valve and/or apply SUBTASK 326110-833-006 001 Adjust the control rod between Doors and the MLG Sequence Valve Before next flight None None

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 6 5

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# @A300-600 SERVICE BULLETIN
Table 1: Accomplishment Timescale Table Compliance time Condition Action Threshold (whichever occurs first) Grace period (whichever occurs first) Repetitive interval
Apply SUBTASK 326110-833-005 001 Adjust the control rod between Doors and the NLG Sequence Valve Before next flight None

and/or apply SUBTASK 326110-833-006 001 Adjust the control rod between Doors and the MLG Sequence Valve and Before next flight None

Apply SUBTASK 326110-833-003 001 Install a Serviceable NLG Sequence Valve and Lever Before next flight 500 FC none

and/or Not possible to insert the rigging pin(s) freely and Not possible to insert a pin of 7.1 mm (0,279 in) See note (*) apply SUBTASK 326110-833-004 001 Install a Serviceable MLG Sequence Valve and Lever Before next flight 500 FC None
Note (*): This pin of 7.1 mm (0.279 in) diameter is valid only for hole 1 for NLG and MLG. 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 and/or intervals and/or date given above but reference should be made to the AD for confirmation of the mandated accomplishment timescale. 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.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 7 5

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# @A300-600 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 326110-832-801-001: Inspection Get Access 1.00 On Aircraft Do a Detailed Inspection of the NLG Sequence Valve lever and the Pin shearing indicating area 0.25 Do a Detailed Inspection of the MLG Sequence Valve lever and the Pin shearing indicating area 0.25 Do a Detailed Inspection of the adjustment of the control rod between Door and NLG Sequence Valve 0.50 Do a Detailed Inspection of the adjustment of the control rod between Doors and MLG Sequence Valve 0.50 Adjust the control rod between Doors and the NLG Sequence Valve 1.00 Adjust the control rod between Doors and the MLG Sequence Valve 1.00 Install a Serviceable NLG Sequence Valve and Lever 1.50 Install a Serviceable MLG Sequence Valve and Lever 1.50 Tests 1.00 Close-Up 1.00 TOTAL MANHOURS 9.50 ELAPSED TIME (HOURS) 5.00 NOTE: For details concerning the elapsed time assumption, refer to Appendix 01 - Elapsed Time Assumption H. WEIGHT AND BALANCE Not Changed I. ELECTRICAL LOAD DATA Not Changed J. REFERENCES

Aircraft Maintenance Manual (AMM) 06-21-00 12-12-29 24-00-00 29-10-00 29-14-00 32-12-11 32-22-11 32-31-00 32-31-18 32-31-37 Elec. Std. Practices Manual (ESPM) 20-55-00

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 8 5

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# @A300-600 SERVICE BULLETIN
K. PUBLICATION AFFECTED None L. INTERCHANGEABILITY/MIXABILITY Not Applicable M. SPARES None

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 9 5

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# @A300-600 SERVICE BULLETIN

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# @A300-600 SERVICE BULLETIN
2. MATERIAL INFORMATION **CONF ALL A. MATERIAL - PRICE AND AVAILABILITY (1) Procurement Addresses Vendor parts are to be procured from: Messier-Bugatti-Dowty Sales and Administration Dpt. Inovel Parc Sud 78142 Velizy Cedex France For ordering by fax (Commercial) : +33 (0)1 46 29 88 For ordering by fax (Technical Spec 2000):+33 (0)1 46 29 88 (2) Price and Availability No AIRBUS kit will be provided. Procurement terms for the equipment must be negotiated with the equipment supplier. B. INDUSTRY SUPPORT INFORMATION Industry support terms for the equipment must be negotiated with the equipment supplier. C. LIST OF COMPONENTS No Kit D. LIST OF MATERIALS - OPERATOR SUPPLIED None E. PARTS TO BE RE-IDENTIFIED BY OPERATOR None F. TOOLING (1) Tooling - Price and Availability None (2) Tools NOTE: To accomplish the detailed inspection it is necessary to use the tools PN: - Rigging Pin - Nose Gear Sequence Valve Control: 98A32301012000 - Rigging Pin - Main Gear Selector Control: 98A32301018000 and 98A32303002000 DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 11 5

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# @A300-600 SERVICE BULLETIN - Pin of diameter 7.1 mm (0.279 in) (3) Special Tools None

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 12 5

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# @A300-600 SERVICE BULLETIN
3. ACCOMPLISHMENT INSTRUCTIONS Task 326110-832-801-001 - Inspection 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. NOTE: The purpose of flow charts are for information only to show the various Inspection/Repair phases described in this Service Bulletin. Task Associated Data Zone 711 731 741 Manpower TOTAL MANHOURS 9.50 ELAPSED TIME (HOURS) 5.00 A. GENERAL (1) Subtask 326110-910-001-001 - Standard Practices Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 06-21-00, Page Block 001 (a) For the identification of zones (Refer to AMM 06-21-00, Page Block 001). (2) Subtask 326110-839-001-001 - Administrative Manpower Resources Skills NON SPECIFIC
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 13 5

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# @A300-600 SERVICE BULLETIN (a) Write in the applicable aircraft records that you have done all the work given in this Service Bulletin. B. PREPARATION (1) Subtask 326110-941-001-001 - Job Set-up Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 24-00-00, Page Block 301 29-10-00, Page Block 301 29-14-00, Page Block 301 32-12-11, Page Block 301 32-22-11, Page Block 301 (a) Make sure that the aircraft is electrically grounded (Refer to AMM 24-00-00 Page Block 301). (b) Put the access platform(s) in position. (c) Open the NLG doors (Refer to AMM 32-22-11, Page Block 301). (d) Open the MLG doors (Refer to AMM 32-12-11, Page Block 301). (e) Depressurize green hydraulic system (Refer to AMM 29-10-00, Page Block 301). (f) Depressurize green hydraulic reservoir (Refer to AMM 29-14-00, Page Block 301). C. PROCEDURE (1) Subtask 326110-832-001-001 - Do a Detailed Inspection of the NLG Sequence Valve lever and the Pin shearing indicating area Work Zones and Access Panels Zone Access/Work location 711 Manpower Resources Manhours 0.25 Minimum number of person 1 Subtask elapsed time 0.25 Skills NON SPECIFIC References Fig. A-FBAAA Inspection of the NLG Door Sequence Valve Sheet 01 Fig. A-FFAAA Flow Chart Sheet 01

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 14 5

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# @A300-600 SERVICE BULLETIN (a) At the threshold given in the Planning Information Paragraph E.(2): Do a detailed inspection of the NLG sequence valve lever and the pin shearing indicating area. Refer to Fig. A-FBAAA Sheet 01 and Fig. A-FFAAA Sheet 01 1 If deformation, crack or damage is found: - Apply SUBTASK 326110-833-003 001 Install a Serviceable NLG Sequence Valve and Lever before next flight. 2 If no deformation, crack or damage is found: - Apply SUBTASK 326110-832-003 001 Do a Detailed Inspection of the adjustment of the control rod between Door and NLG Sequence Valve before next flight. (b) Send inspection report to AIRBUS, (Refer to Appendix 02 - Inspection Report - NLG and MLG Sequence Valve ). (2) Subtask 326110-832-002-001 - Do a Detailed Inspection of the MLG Sequence Valve lever and the Pin shearing indicating area Work Zones and Access Panels Zone Access/Work location 731 741 Manpower Resources Manhours 0.25 Minimum number of person 1 Subtask elapsed time 0.25 Skills NON SPECIFIC References Fig. A-FBBAA Inspection of the MLG Door Sequence Valve Sheet 01 Fig. A-FFAAA Flow Chart Sheet 01 (a) At the threshold given in the Planning Information Paragraph E.(2): Do a detailed inspection of the MLG sequence valve lever and the pin shearing indicating area. Refer to Fig. A-FBBAA Sheet 01 and Fig. A-FFAAA Sheet 01

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 15 5

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# @A300-600 SERVICE BULLETIN

1 If deformation, crack or damage is found: - Apply SUBTASK 326110-833-004 001 Install a Serviceable MLG Sequence Valve and Lever before next flight. 2 If no deformation, crack or damage is found: - Apply SUBTASK 326110-832-004 001 Do a Detailed Inspection of the adjustment of the control rod between Doors and MLG Sequence Valve before next flight. (b) Send inspection report to AIRBUS, (Refer to Appendix 02 - Inspection Report - NLG and MLG Sequence Valve ). (3) Subtask 326110-832-003-001 - Do a Detailed Inspection of the adjustment of the control rod between Door and NLG Sequence Valve Work Zones and Access Panels Zone Access/Work location 711 Manpower Resources Manhours 0.50 Minimum number of person 1 Subtask elapsed time 0.50 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-18, Page Block 401 Fig. A-FBAAA Inspection of the NLG Door Sequence Valve Sheet 01
(a) Check the correct adjustment of the control rod between doors and NLG sequence valve by insertion of the rigging pin or the pin of diameter 7.1 mm (0.279 in) in rigging hole 1. Refer to Fig. A-FBAAA Sheet 01 1 If it is possible to insert freely the rigging pin 98A32301012000 in rigging hole 1: - No further action. 2 If it is not possible to insert freely the rigging pin 98A32301012000 in rigging hole 1 but possible to insert a pin of diameter 7.1 mm (0,279 in): - Apply SUBTASK 326110-833-005 001 Adjust the control rod between Doors and the NLG Sequence Valve before next flight.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 16 5

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# @A300-600 SERVICE BULLETIN
3 If it is not possible to insert freely the rigging pin 98A32301012000 in rigging hole 1 and not possible to insert a pin of diameter 7.1 mm (0,279 in): - Adjust the mechanical linkages before next flight, (Refer to SUBTASK 326110-833-005 001 Adjust the control rod between Doors and the NLG Sequence Valve ). and - Apply SUBTASK 326110-833-003 001 Install a Serviceable NLG Sequence Valve and Lever within the compliance time given in the Planning Information Paragraph E.(2). (b) Send inspection report to AIRBUS, (Refer to Appendix 02 - Inspection Report - NLG and MLG Sequence Valve ). (4) Subtask 326110-832-004-001 - Do a Detailed Inspection of the adjustment of the control rod between Doors and MLG Sequence Valve Work Zones and Access Panels Zone Access/Work location 731 741 Manpower Resources Manhours 0.50 Minimum number of person 1 Subtask elapsed time 0.50 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-37, Page Block 401 Fig. A-FBBAA Inspection of the MLG Door Sequence Valve Sheet 01
(a) Check the correct adjustment of the control rod between doors and MLG sequence valve by insertion of a rigging pin or pin of diameter 7.1 mm (0.279 in) in rigging hole 1 and by installation of the rigging pin on the hole 2. Refer to Fig. A-FBBAA Sheet 01 1 If it is possible to insert freely the rigging pins 98A32301018000 and 98A32303002000 in rigging holes 1 and 2: - No further action.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 17 5

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# @A300-600 SERVICE BULLETIN

2 If it is not possible to insert freely the rigging pin 98A32301018000 in rigging hole 1 but possible to insert a pin of diameter 7.1 mm (0,279 in) and possible to insert freely the rigging pin 98A32303002000 in rigging hole 2: - Apply SUBTASK 326110-833-006 001 Adjust the control rod between Doors and the MLG Sequence Valve before next flight. 3 If it is not possible to insert freely the rigging pin 98A32301018000 in rigging hole 1 and not possible to insert a pin of diameter 7.1 mm (0,279 in) or not possible to insert freely the rigging pin 98A32303002000 in rigging hole 2: - Adjust the mechanical linkages before next flight, (Refer to SUBTASK 326110-833-006 001 Adjust the control rod between Doors and the MLG Sequence Valve ). and - Apply SUBTASK 326110-833-004 001 Install a Serviceable MLG Sequence Valve and Lever within the compliance time given in the Planning Information Paragraph E.(2). (b) Send inspection report to AIRBUS, (Refer to Appendix 02 - Inspection Report - NLG and MLG Sequence Valve ). (5) Subtask 326110-833-005-001 - Adjust the control rod between Doors and the NLG Sequence Valve Work Zones and Access Panels Zone Access/Work location 711 Manpower Resources Manhours 1.00 Minimum number of person 1 Subtask elapsed time 1.00 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-18, Page Block 401 (a) Adjust the control rod between door and the NLG sequence valve, (Refer to AMM 32-31-18, Page Block 401). NOTE: There is no need at this stage to do the test procedure described in AMM 32-31-18, Page Block 401. (6) Subtask 326110-833-006-001 - Adjust the control rod between Doors and the MLG Sequence Valve Work Zones and Access Panels Zone Access/Work location 731 DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 18 5

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# @A300-600 SERVICE BULLETIN

741 Manpower Resources Manhours 1.00 Minimum number of person 1 Subtask elapsed time 1.00 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-37, Page Block 401 (a) Adjust the control rod between doors and the MLG sequence valve, (Refer to AMM 32-31-37, Page Block 401). NOTE: There is no need at this stage to do the test procedure described in AMM 32-31-37, Page Block 401. (7) Subtask 326110-833-003-001 - Install a Serviceable NLG Sequence Valve and Lever Work Zones and Access Panels Zone Access/Work location 711 Manpower Resources Manhours 1.50 Minimum number of person 1 Subtask elapsed time 1.50 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-18, Page Block 401 (a) Remove the NLG sequence valve, (Refer to AMM 32-31-18, Page Block 401). (b) Scrap the lever on the removed sequence valve and send the removed sequence valve in shop. (c) Install a serviceable NLG sequence valve (including lever), (Refer to AMM 32-31-18, Page Block 401). (8) Subtask 326110-833-004-001 - Install a Serviceable MLG Sequence Valve and Lever Work Zones and Access Panels Zone Access/Work location 731 741

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 19 5

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# @A300-600 SERVICE BULLETIN
Manpower Resources Manhours 1.50 Minimum number of person 1 Subtask elapsed time 1.50 Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-37, Page Block 401 (a) Remove the MLG sequence valve, (Refer to AMM 32-31-37, Page Block 401). (b) Scrap the lever on the removed sequence valve and send the removed sequence valve in shop. (c) Install a serviceable MLG sequence valve (including lever), (Refer to AMM 32-31-37, Page Block 401). D. TEST (1) Subtask 326110-700-001-001 - Test Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-31-00, Page Block 501 (a) If only NLG sequence valve(s) have been replaced: 1 Do a Nose Gear Functional test Main Gear on ground (Refer to AMM 32-31-00, Page Block 501). (b) If MLG sequence valve(s) have been replaced: 1 Do a gear Normal Extension and Retraction functional test (Refer to AMM 32-31-00, Page Block 501). NOTE: Landing Gear tests are not required if adjustment only has been performed. E. CLOSE-UP (1) Subtask 326110-942-001-001 - Close-up Manpower Resources Skills NON SPECIFIC

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 20 5

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# @A300-600 SERVICE BULLETIN

References Aircraft Maintenance Manual (AMM) 12-12-29, Page Block 001 29-10-00, Page Block 301 29-14-00, Page Block 301 32-12-11, Page Block 301 32-22-11, Page Block 301 (a) Pressurize green hydraulic system (Refer to AMM 29-10-00, Page Block 301). (b) Pressurize green hydraulic reservoir (Refer to AMM 29-14-00, Page Block 301). (c) Close the MLG doors (Refer to AMM 32-12-11, Page Block 301). (d) Close the NLG doors (Refer to AMM 32-22-11, Page Block 301). (e) Replenish hydraulic reservoirs as necessary if not already done in Test procedure (Refer to AMM 12-12-29, Page Block 001). (f) Remove access platforms. (g) Restore the systems and the aircraft to normal operating condition.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 21 5

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# @A300-600 SERVICE BULLETIN

**CONF ALL



## A Z711 

### A **B C** 

NLG SEQUENCE VALVE

SEQUENCE VALVE LEVER RIGGING PIN P/N: 98A−3230−1012−000 OR PIN OF 7.1 mm (0.279 in) DIAMETER HOLE 1

LH SIDE SHOWN 

## B **C** PIN SHEARING INDICATING AREA

D_SB_326110_5_BAAA_01_03 Figure A-FBAAA - Sheet 01 Inspection of the NLG Door Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 22 5

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# @A300-600 SERVICE BULLETIN

**CONF ALL

Z741 Z731 

### C

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## A **B A** 

**B**

**FWD** RIGGING HOLE FOR RIGGING PIN 98A−3230−1018−000 OR PIN OF 7.1 mm (0.279 in) DIAMETER MLG SEQUENCE VALVE

RIGGING HOLE FOR RIGGING PIN 98A−3230−3002−000

PIN SHEARING

LH SIDE SHOWN RH SIDE SYMMETRICAL HOLE 1

HOLE 2



## C LEVER AREA INDICATING AREA

D_SB_326110_5_BBAA_01_03 Figure A-FBBAA - Sheet 01 Inspection of the MLG Door Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 23 5

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# @A300-600 SERVICE BULLETIN

**CONF ALL

QUESTION ACTION FINDING AND THE PIN SHEARING INDICATING AREA AT THRESHOLD GIVEN IN PLANNING INFORMATION PARAGRAPH E.(2).

YES DO A DETAILED INSPECTION OF THE SEQUENCE VALVE LEVER

FINDING DAMAGE

FREELY/EASILY THE TO INSERT POSSIBILITY RIGGING PIN REFER TO SUBTASK 326110−832−001−001 AND 326110−832−002−001

NO

MECHANICAL LINKAGES BETWEEN DOORS AND NLG (NOSE LANDING DO A DETAILED INSPECTION OF THE ADJUSTMENT OF THE GEAR) AND MLG (MAIN LANDING GEAR) SEQUENCE VALVES REFER TO SUBTASK 326110−832−003−001 AND 326110−832−004−001

YES NO

NO FURTHER ACTION 7.1 mm (0.279 in) TO INSERT A PIN OF POSSIBILITY

DIAMETER YES NO

ADJUST THE MECHANICAL LINKAGES REFER TO SUBTASK 326110−833−005−001 AND

NO FURTHER ACTION 326110−833−006−001 

### * ADJUST THE MECHANICAL LINKAGES REFER TO SUBTASK 326110−833−005−001 AND 326110−833−006−001

**NOTE:**

THE PIN OF 7.1 mm (0.279 in) DIAMETER IS VALID ONLY FOR HOLE 1 FOR NLG AND MLG 

### * NO FURTHER ACTION AND SEQUENCE VALVE (INCLUDING LEVER) INSTALL A SERVICEABLE

326110−833−003−001 AND/OR 326110−833−004−001 SEND THE INVOLVED SEQUENCE VALVE IN SHOP (SCRAP THE LEVER) REFER TO SUBTASKS

D_SB_326110_5_FAAA_01_05 Figure A-FFAAA - Sheet 01 Flow Chart
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 24 5

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# @A300-600 SERVICE BULLETIN Appendix 01 - Elapsed Time Assumption **CONF ALL (1) The following chart is only a proposal operators may determine that another way to do the work is more suitable for them.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300-600 SERVICE BULLETIN Appendix 01 - Elapsed Time Assumption

**CONF ALL
**ELAPSED TIME ASSUMPTION SERVICE BULLETIN No. A300−32−6110**

SB ELAPSED TIME (HOURS) GET ACCESS MH ET/S

TOTAL MANHOURS SB ELAPSED TIME 10.00 5.00 STEPS

1.00 0.50

1 2 3 4 5 0 INSPECTION OF THE NLG SEQUENCE VALVE LEVER AREA AND THE PIN SHEARING AREA 0.25 0.25 INSPECTION OF THE MLG SEQUENCE VALVE LEVER AREA AND THE PIN SHEARING AREA 0.25 0.25 INSPECTION OF THE ADJUSTEMENT OF THE MECHANICAL LINKS BETWEEN DOORS 0.50 0.50 INSPECTION OF THE ADJUSTEMENT OF THE MECHANICAL LINKS BETWEEN DOORS 0.50 0.50

TEST 1.00 0.50 CLOSE−UP 1.00 0.50

MH ET/S: PER MANHOURS ELAPSED TIME PER STEP NUMBER OF PERSONS 01 02

THIS CHART IS ONLY A PROPOSAL. OPERATORS MAY DETERMINE THAT ANOTHER WAY TO DO THE WORK IS MORE SUITABLE FOR THEM. 01
02 **NOTES:** PER

2
1
1
1
1

2
2 ADJUST THE MECHANICAL LINKS BETWEEN DOORS AND THE INVOLVED 1.00 1.00 1

: : IF A VSB IS INVOLVED, THE ASSOCIATED MANHOURS ARE NOT REFLECTED IN THIS GANTT CHART. AND NLG SEQUENCE VALVE AND MLG SEQUENCE VALVE NLG SEQQUENCE VALVES ADJUST THE MECHANICAL LINKS BETWEEN DOORS AND THE INVOLVED 1.00 1.00 1 MLG SEQQUENCE VALVES SEND THE INVOLVED NLG SEQUENCE VALVE 0.25 0.25 1

INSTALL A SERVICEABLE NLG SEQUENCE VALVE 1.50 1.50 1 SEND THE INVOLVED MLG SEQUENCE VALVE 0.25 0.25 1

INSTALL A SERVICEABLE MLG SEQUENCE VALVE 1.50 1.50 1

D_SB_326110_5_AAAA_01_00 Figure A-FAAAA - Sheet 01 Elapsed Time Assumption
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300-600 SERVICE BULLETIN Appendix 02 - Inspection Report - NLG and MLG Sequence Valve **CONF ALL The results of the inspection, including no findings, replacement or action to be done, must be forwarded to AIRBUS Department SEEL3, on the attached inspection report sheet.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300-600 SERVICE BULLETIN Appendix 02 - Inspection Report - NLG and MLG Sequence Valve

**CONF ALL **INSPECTION REPORT** SERVICE BULLETIN No. : A/C MSN : FLIGHT CYCLES : FLIGHT HOURS : A300−32−6110

DATE OF INSPECTION : RETURN TO : AIRBUS CUSTOMER SERVICES ENGINEERING − SEEL3 LANDING GEAR SYSTEMS A330/A340 & WIDE BODY

INSPECTION METHOD : DETAILED INSPECTION 1 ROND POINT MAURICE BELLONTE 31707 BLAGNAC CEDEX FRANCE FAX +33 (0)5 61 93 32 73

DETAILED INSPECTION DAMAGE FOUND DETAILED INSPECTION RIGGING PIN INSERTED FREELY/EASILY PIN OF 7.1 mm (0.279 in) DIAMETER INSERTED
LH

RH **NLG SEQUENCE VALVE**

DETAILED INSPECTION DAMAGE FOUND DETAILED INSPECTION RIGGING PIN INSERTED FREELY/EASILY PIN OF 7.1 mm (0.279 in) DIAMETER INSERTED
LH

RH **MLG SEQUENCE VALVE**

D_SB_326110_5_RAAA_01_02 Figure A-FRAAA - Sheet 01 Inspection Report - NLG and MLG Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300-600 SERVICE BULLETIN REPORTING SHEET 

### TITLE: LANDING GEAR - NORMAL EXTENSION AND RETRACTION - INSPECTION OF NLG AND MLG SEQUENCE VALVES 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: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300-600 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: Jul 17/12 SERVICE BULLETIN No.: A300-32-6110 REVISION No.: 00 - Jul 17/12 Page: 1 5

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