# @A300 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 sequence. 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300 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) :

001 50W 69X 72U ABR AFG C2A DHL F2I FLM IAW IRA IRM KIR KYE KZU MIX MNB MNG MSR NTR P2A RUN SOP TNO TSY 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 320464-832-801-001: Inspection TOTAL MANHOURS 9.50 ELAPSED TIME (HOURS) 5.00 APPENDICES Appendix 01 - Elapsed Time Assumption DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300 SERVICE BULLETIN SUMMARY Appendix 02 - Inspection Report - NLG and MLG Sequence Valve **CONF ALL

Z711

AREA TO BE INSPECTED 

### A



## A

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## B **C** LH RH 321255 321262 

### B **C**

PIN SHEARING INDICATING AREA

LEVER AREA

A_SB_320464_5_SAAA_01_03 Figure A-FSAAA - Sheet 01
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 3 5

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# @A300 SERVICE BULLETIN SUMMARY

**CONF ALL

Z741 Z731

**FWD** AREA TO BE INSPECTED

LH SIDE SHOWN RH SIDE SYMMETRICAL 

### C

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## A **B**

**C** LH RH 321214 321215



### B **A**

PIN SHEARING INDICATING AREA LEVER AREA

A_SB_320464_5_SBAA_01_03 Figure A-FSBAA - Sheet 01

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 4 5

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# @A300 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 B2-1C B2-203 B2K-3C B4-103 B4-120 B4-203 B4-2C C4-203 F4-203 (2) Effectivity by MSN 0003 0041 0045 0047 0053 0055 0075 0079-0080 0082-0085 0090 0094-0095 0100-0101 0105 0107 0116-0117 0123-0126 0128-0129 0133 0135-0137 0139 0141 0147 0149-0152 0154-0157 0160 0170 0173 0175-0176 0180 0183-0185 0187 0189 0199-0200 0203-0204 0210-0212 0216 0218-0220 0226-0227 0234-0236 0239 0243-0244 0247 0249-0250 0255-0256 0259 0261 0265 0274 0277 0289 0292 0299 0302 0304 (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.
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300 SERVICE BULLETIN
OPERATOR MSN 001 0125 50W 0003 69X 0095 72U 0079 ABR 0152 0184 0189 0199 0219 0220 0234 0236 0250 0259 0274 0289 AFG 0180 C2A 0261 DHL 0084 0085 0141 0149 0249 0265 F2I 0083 0094 0128 0133 0135 0136 0137 0156 0170 0235 0243 FLM 0082 0176 IAW 0239 IRA 0080 0139 0151 0173 0185 0187 0226 0256 0299 0302 IRM 0055 0090 0160 0175 0204 0244 KIR 0277 0292 KYE 0053 0100 0211 0216 KZU 0041 0101 0117 MIX 0157 0203 0218 MNB 0123 0212 0304 MNG 0047 MSR 0200 0255 NTR 0124 0155 P2A 0116 0150 RUN 0075 0105 0107 0147 0154 0183 SOP 0126 TNO 0045 0210 0227 0247 TSY 0129 (4) Configuration by MSN MSN CONFIGURATION 0003 0041 0045 0047 0053 0055 0075 0079 0080 0082 0083 0084 0085 0090 0094 0095 0100 0101 0105 0107 0116 0117 0123 0124 0125 0126 0128 0129 0133 0135 0136 0137 0139 0141 0147 0149 0150 0151 0152 0154 0155 0156 0157 0160 0170 0173 0175 0176 0180 0183 0184 0185 0187 0189 0199 0200 0203 0204 0210 0211 0212 0216 0218 0219 0220 0226 0227 0234 0235 0236 0239 0243 0244 0247 0249 0250 0255 0256 0259 0261 0265 0274 0277 0289 0292 0299 0302 0304 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
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300 SERVICE BULLETIN
B. CONCURRENT REQUIREMENTS None 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 sequence. (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 320464-832-801-001: 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 Doors and NLG Sequence Valve (4) Do a Detailed Inspection of the adjustment of the control rod between Doors and DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 3 5

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# @A300 SERVICE BULLETIN MLG Sequence Valve (5) Adjust the control rod between Door and the NLG Sequence Valve (6) Adjust the control rod between Door 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 320464-832-001 001 Do a Detailed Inspection of the NLG Sequence Valve lever and the Pin shearing indicating area and apply SUBTASK 320464-832-002 001 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 320464-833-003 001 Install a Serviceable NLG Sequence Valve and Lever and/or apply SUBTASK 320464-833-004 001 Install a Serviceable MLG Sequence Valve and Lever Before next flight None None

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 4 5

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# @A300 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 320464-832-003 001 Do a Detailed Inspection of the adjustment of the control rod between Doors and NLG Sequence Valve and/or apply SUBTASK 320464-832-004 001 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) diameter See note (*) Apply SUBTASK 320464-833-005 001 Adjust the control rod between Door and the NLG Sequence Valve and/or apply SUBTASK 320464-833-006 001 Adjust the control rod between Door and the MLG Sequence Valve Before next flight None None

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 5 5

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# @A300 SERVICE BULLETIN
Table 1: Accomplishment Timescale Table Compliance time Condition Action Threshold (whichever occurs first) Grace period (whichever occurs first) Repetitive interval
Apply SUBTASK 320464-833-005 001 Adjust the control rod between Door and the NLG Sequence Valve Before next flight None

and/or apply SUBTASK 320464-833-006 001 Adjust the control rod between Door and the MLG Sequence Valve Before next flight None

and apply SUBTASK 320464-833-003 001 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) diameter See note (*)

apply SUBTASK 320464-833-004 001 Install a Serviceable MLG Sequence Valve and Lever Before next flight 500 FC None

Note (*): The 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 6 5

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# @A300 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 320464-832-801-001: 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 Doors 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 Door and the NLG Sequence Valve 1.00 Adjust the control rod between Door 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 32-30-00 32-31-18 32-31-37 Elec. Std. Practices Manual (ESPM) 20-55-00

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 7 5

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

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 8 5

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# @A300 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 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 9 5

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

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 10 5

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# @A300 SERVICE BULLETIN
3. ACCOMPLISHMENT INSTRUCTIONS Task 320464-832-801-001 - 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 320464-910-001-001 - 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 320464-839-001-001 - Administrative Manpower Resources Skills NON SPECIFIC
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 11 5

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# @A300 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 320464-941-001-001 - 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 320464-832-001-001 - 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 12 5

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# @A300 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 320464-833-003 001 Install a Serviceable NLG Sequence Valve and Lever before next flight. 2 If no deformation, crack or damage is found: - Apply SUBTASK 320464-832-003 001 Do a Detailed Inspection of the adjustment of the control rod between Doors 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 320464-832-002-001 - 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 13 5

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# @A300 SERVICE BULLETIN
1 If deformation, crack or damage is found: - Apply SUBTASK 320464-833-004 001 Install a Serviceable MLG Sequence Valve and Lever before next flight. 2 If no deformation, crack or damage is found: - Apply SUBTASK 320464-832-004 001 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 320464-832-003-001 - Do a Detailed Inspection of the adjustment of the control rod between Doors 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 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 320464-833-005 001 Adjust the control rod between Door and the NLG Sequence Valve before next flight.

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 14 5

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# @A300 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 320464-833-005 001 Adjust the control rod between Door and the NLG Sequence Valve ). and - Apply SUBTASK 320464-833-003 001 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 320464-832-004-001 - 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 in rigging 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 15 5

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# @A300 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 320464-833-006 001 Adjust the control rod between Door 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 control rod before next flight, (Refer to SUBTASK 320464-833-006 001 Adjust the control rod between Door and the MLG Sequence Valve ). and - Apply SUBTASK 320464-833-004 001 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 320464-833-005-001 - Adjust the control rod between Door 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 320464-833-006-001 - Adjust the control rod between Door and the MLG Sequence Valve Work Zones and Access Panels Zone Access/Work location 731 DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 16 5

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# @A300 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 320464-833-003-001 - 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 320464-833-004-001 - 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 17 5

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# @A300 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 320464-700-002-001 - Test Manpower Resources Skills NON SPECIFIC References Aircraft Maintenance Manual (AMM) 32-30-00, 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 32-30-00, 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 32-30-00, Page Block 501). NOTE: Landing Gear tests are not required if adjustment only has been performed. E. CLOSE-UP (1) Subtask 320464-942-001-001 - Close-up Manpower Resources Skills NON SPECIFIC

DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 18 5

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# @A300 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 if not already done in Test procedure (Refer to AMM 29-10-00, Page Block 301). (b) Pressurize green hydraulic reservoir if not already done in Test procedure (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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 19 5

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# @A300 SERVICE BULLETIN

**CONF ALL

Z711


## A

NLG SEQUENCE VALVE

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

### A

HOLE 1

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## B **C C**  **B**

PIN SHEARING INDICATING AREA

A_SB_320464_5_BAAA_01_03 Figure A-FBAAA - Sheet 01 Inspection of the NLG Door Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 20 5

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# @A300 SERVICE BULLETIN

**CONF ALL

Z741 Z731

**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 

### C

LH SIDE SHOWN RH SIDE SYMMETRICAL 

## A **B**

HOLE 1

HOLE 2



## C **A**

**B**

LEVER AREA INDICATING AREA

A_SB_320464_5_BBAA_01_03 Figure A-FBBAA - Sheet 01 Inspection of the MLG Door Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 21 5

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# @A300 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(S) REFER TO SUBTASK 320464−832−001−001 AND 320464−832−002−001

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 320464−832−003−001 AND 320464−832−004−001

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 320464−833−005−001 AND

NO FURTHER ACTION 320464−833−006−001

**NOTE:**

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

### * *****

NO FURTHER ACTION ADJUST THE MECHANICAL LINKAGES REFER TO SUBTASK 320464−833−005−001 AND 320464−833−006−001

AND SEQUENCE VALVE (INCLUDING LEVER) INSTALL A SERVICEABLE

320464−833−003−001 AND/OR 320464−833−004−001 SEND THE INVOLVED SEQUENCE VALVE IN SHOP (SCRAP THE LEVER) REFER TO SUBTASKS

A_SB_320464_5_FAAA_01_06 Figure A-FFAAA - Sheet 01 Flow Chart
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 22 5

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# @A300 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300 SERVICE BULLETIN Appendix 01 - Elapsed Time Assumption

**CONF ALL
**ELAPSED TIME ASSUMPTION SERVICE BULLETIN No. A300−32−0464**

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

A_SB_320464_5_AAAA_01_00 Figure A-FAAAA - Sheet 01 Elapsed Time Assumption
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 1 5

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

**CONF ALL

DETAILED INSPECTION **INSPECTION REPORT** SERVICE BULLETIN No. : A/C MSN : FLIGHT CYCLES : FLIGHT HOURS : A300−32−0464

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

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**

A_SB_320464_5_RAAA_01_02 Figure A-FRAAA - Sheet 01 Inspection Report - NLG and MLG Sequence Valve
DATE: Jul 17/12 SERVICE BULLETIN No.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 2 5

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# @A300 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 1 5

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# @A300 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.: A300-32-0464 REVISION No.: 00 - Jul 17/12 Page: 1 5

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