@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.

MANDATORY MANDATORY MANDATORY

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

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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

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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

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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

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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: 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.

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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

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SERVICE BULLETIN

B. CONCURRENT REQUIREMENTS

None

C. REASON

(1) History

In 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

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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

Condition Action Compliance time

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

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SERVICE BULLETIN

Table 1: Accomplishment Timescale Table

Condition Action Compliance time

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

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SERVICE BULLETIN

Table 1: Accomplishment Timescale Table

Condition Action Compliance time

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.

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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

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SERVICE BULLETIN

K. PUBLICATION AFFECTED

None

L. INTERCHANGEABILITY/MIXABILITY

Not Applicable

M. SPARES

None

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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

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SERVICE BULLETIN

- Pin of diameter 7.1 mm (0.279 in)

(3) Special Tools

None

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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

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(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

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(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

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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.

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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

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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

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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

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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

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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

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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

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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

INDICATING AREA LEVER 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

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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

NO YES

NO FURTHER

ACTION

7.1 mm (0.279 in)

TO INSERT A PIN OF

POSSIBILITY

DIAMETER

NO YES

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

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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

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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

0 1 2 3 4 5

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

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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

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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

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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

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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

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