Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 1 of 18

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821

SERVICE BULLETIN

LANDING GEAR - MAIN LANDING GEAR - 

INSPECTION OF THE BOGIE BEAM INTERNAL DIAMETER FOR CORROSION

1. Planning Information

A. Effectivity

Aircraft affected: AIRBUS A330/340

Unit affected: Main Landing Gear Complete

which includes

Bogie and Dressings

which includes

Bogie Assembly

Part/Type Nos.: 201490 Series (Main Landing Gear Complete)

201252 Series (Main Landing Gear Complete)

which includes

201486 Series (Bogie and Dressings)

201274 Series (Bogie and Dressings)

which includes

201485 Series (Bogie Assembly)

201272 Series (Bogie Assembly)

B. Concurrent Requirements

(1) None.

C. Reason

(1) A bogie beam has fractured in-service.

(2) Corrosion of the internal diameter of the bogie beam adjacent to the bogie beam pivot

pin may have contributed to the fracture.

D. Description

(1) Messier-Dowty Limited tells you that this Service Bulletin includes details to do a visual

inspection on the bogie beam. The inspection includes:

(a) The removal of the bogie and dressings from the main landing gear complete.

(b) A visual examination of the internal diameter for corrosion or damage to

protective treatments of the bogie beam.

(c) Repair of any corrosion or damage to protective treatments.

(2) Messier-Dowty Limited tells you that you must complete the proforma in Appendix D to

report results of the inspection and return it to the address shown in Appendix D.

(a) The information to be recorded is:

1 Any results showing no damage to protective treatments.

2 Any damage to paint.

3 Any damage to cadmium plate.

4 Any damage or corrosion of base material.

Nov 16/2007

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Service Bulletin No. A33/34-32-272

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SERVICE BULLETIN

E. Compliance

(1) It is expected that the contents of this Service Bulletin will be made MANDATORY by

EASA.

(2) Messier-Dowty recommends that you do this Service Bulletin as soon as possible.

(a) For details of compliance refer to Airbus cover Service Bulletin A330-32-3225 and

A340-32-4268.

F. Approval

(1) The technical content of this Service Bulletin has been approved under the authority of

the EASA Design Organisation Approval No. EASA.21J.031.

G. Manpower

(1) Messier-Dowty Limited make an estimate that it will take approximately 9 man-hours to

do this Service Bulletin. The elapsed time will be 4.5 hours. The time given is for the

visual inspection with the bogie and dressings removed.

NOTE: It is assumed that the equipment has been placed in a maintenance

status. The man-hour estimates do not include preparation, close out or

administrative functions.

H. Weight and Balance

(1) None.

I. References

(1) Messier-Dowty Limited Component Maintenance Manual 32-12-01.

(2) Messier-Dowty Limited Component Maintenance Manual 32-12-04.

(3) Messier-Dowty Limited Component Maintenance Manual 32-12-05.

(4) Messier-Dowty Limited Component Maintenance Manual 32-11-70.

(5) Messier-Dowty Limited Component Maintenance Manual 32-11-94.

(6) Messier-Dowty Limited Component Maintenance Manual 32-11-95.

(7) Messier-Dowty Limited Component Maintenance Manual 32-11-74.

(8) Messier-Dowty Standard Practices Manual 20-00-10.

(9) Airbus Service Bulletin A330-32-3225 and A340-32-4268.

(10) Aircraft Maintenance Manual.

J. Other Publications Affected

(1) None.

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Service Bulletin No. A33/34-32-272

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SERVICE BULLETIN

2. Material Information

A. Material - Price and Availability

(1) The prices shown in this material section are valid for the calandar year, ending

December 31st 2008. Refer to the Messier-Dowty Spare Parts Price Catalog for

subsequent year prices or contact your regional Messier-Dowty Technical Assistance

and Spares Support Center (TASSC) for the latest price and availability information.

B. Material Necessary For Each Unit

The I/D codes below give information which help you to understand the

instruction/disposition.

I/D Code Instruction/information

A New part

B Part that can be obtained from the old one

C Expendable part

D Old part to be discarded

E Part of new design valid for new manufacture

F Part number change only

Interchangeability codes (IC) given below show basic information to help you understand the

interchangeability of parts. For full explanation of interchangeability codes, please refer to

the latest edition of ATA specification 2000.

IC Instruction/information

01 One-way interchangeable

02 Two-way interchangeable

03 Not interchangeable

04 Interchangeable as a set

05 Qualified Interchangeability

C. The table that follows tells operators of the items that are necessary to do this Service

Bulletin. It does not include tools or materials that are referred to in the Component

Maintenance Manuals. 

New

Part No.

Qty.

Per

Unit

Keyword Old

Part No.

Instructions/ 

Disposition

IC

MS17825-4 11 Nut - Replacement

Parts

(D)

-

MS17825-3 2 Nut - -

NAS1149F0632P 4 Washer - -

NAS1149F0663P 2 Washer - -

NAS1149F0432P 51 Washer - -

NAS1149F0463P 8 Washer - -

NAS1149F0363P 2 Washer - -

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Service Bulletin No. A33/34-32-272

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SERVICE BULLETIN

D. Tooling

(1) These special tools are necessary:

NOTE: Alternative equivalents are permitted.

(2) Other tools necessary to do this Service Bulletin are included in SPECIAL TOOLS,

FIXTURES, EQUIPMENT AND CONSUMABLES: refer to the applicable CMM.

NOTE: Refer to Appendix B for the tools that are necessary to do NDT product

support technique No. PS 351ET Issue 2.

3. Accomplishment Instructions

The figure/item numbers in parentheses in the text agree with those that are in the illustrated

parts list. Only the primary figure/item numbers are used. The Process Specifications (MDLPS,

M-DLNDT and PCS) are in the Standard Practices Manual.

A. Procedure for visual inspection of the internal diameter of the bogie beam: refer to the

Aircraft Maintenance Manual, CMM 32-12-01, CMM 32-12-04, CMM 32-12-05, CMM

32-11-70, CMM 32-11-94, CMM 32-11-95, CMM 32-11-74 and Figures 1 to 4 of this Service

Bulletin.

(1) Make sure the aircraft is in a safe condition: refer to the Aircraft Maintenance Manual. 

(2) Raise the aircraft on jacks: refer to the Aircraft Maintenance Manual.

NAS1611-129A 4 Seal - Replacement

Parts

(D)

-

MS24665-153 18 Split Pin - -

NSA5060E5 8 Nut - -

AN960C516L 16 Washer - -

NAS1149C0563R 16 Washer - -

MS24665-132 4 Split Pin - -

NAS1149F0332P 8 Washer - -

MS17826-4 4 Nut - -

NAS1021N3 6 Nut - -

Part No. Special Tool Function

OLYMPUS Model No. 

IV7650A-2

Boroscope To inspect the bogie beam 

internally

DRT67093 Holding Tool To hold the spigot nuts

DRT67088 Torque Spanner To remove/torque spigots

New

Part No.

Qty.

Per

Unit

Keyword Old

Part No.

Instructions/ 

Disposition

IC

Sep 22/2008 (Revision 1)
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SERVICE BULLETIN

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN OR IN YOUR EYES. DO

NOT BREATHE THE FUMES. ONLY USE IN A LOCATION THAT HAS A

CONTINUOUS FLOW OF CLEAN AIR. HYDRAULIC FLUID IS POISONOUS

AND DANGEROUS.

(3) Disassemble the main landing gear complete sufficiently to remove the bogie and

dressings (1-60, CMM 32-12-01 and CMM 32-11-70): refer to the Aircraft Maintenance

Manual and Airbus cover Service Bulletins A330-32-3225 and A340-32-4268.

NOTE: This inspection check can be done with the bogie and dressings and

the wheels and brakes attached.

NOTE: Protect the ends of the electrical harnesses and hydraulic hoses, to

prevent contamination or damage.

(4) Disconnect the 1M and 2M bogie electrical harnesses from the Tachometers: refer to

the Aircraft Maintenance Manual.

(5) Disassemble the bogie and dressings to remove the 1M and 2M bogie electrical

harnesses:

(a) Remove the bolts (4-10 and 5-10, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) and the washers (4-20 and 5-20, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95).

(b) Remove the nuts (4-30 and 5-30, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) and the washers (4-40 and 5-40, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95).

(c) Remove the bolts (4-50 and 5-50, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95).

NOTE: Keep the P-clips (4-60 and 5-60, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95) in position on the 1M and 2M bogie electrical

harnesses.

(d) Remove the bolts (4-70 and 5-70, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) and the washers (4-80 and 5-80, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95).

(e) Remove the brackets (4-90 and 5-90, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95).

(f) Remove the 1M and 2M bogie electrical harnesses through the spigots (1-160

and 2-140, CMM 32-12-05 and CMM 32-11-74).

NOTE: Carefully remove the 1M and 2M bogie electrical harnesses so as

not to damage them.

(6) Disassemble the bogie assembly to remove the diaphragms:

(a) Remove the split pin (1-70, CMM 32-12-05 and CMM 32-11-74), remove the nut

(1-80, CMM 32-12-05 and CMM 32-11-74), the washers (1-90, CMM 32-12-05

and CMM 32-11-74) and the bolt (1-100, CMM 32-12-05 and CMM 32-11-74).

(b) Remove the nut (1-110, CMM 32-12-05 and CMM 32-11-74) and the jacking

dome (1-120, CMM 32-12-05 and CMM 32-11-74).

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SERVICE BULLETIN

(c) Remove the bolts (1-130, CMM 32-12-05 and CMM 32-11-74), the washers

(1-140, CMM 32-12-05 and CMM 32-11-74) and the locking segment (1-150,

CMM 32-12-05 and CMM 32-11-74).

(d) Use the Holding Tool DRT67093 to hold the axle spigot nut (1-170, CMM

32-12-05 and CMM 32-11-74) and use the Torque Spanner DRT67088 to remove

the spigot (1-160, CMM 32-12-05 and CMM 32-11-74).

(e) Remove the axle spigot nut (1-170, CMM 32-12-05 and CMM 32-11-74).

(f) Remove the diaphragm (1-180, CMM 32-12-05 and CMM 32-11-74).

(g) Remove the split pin (2-20, CMM 32-12-05 and CMM 32-11-74), remove the nut

(2-30, CMM 32-12-05 and CMM 32-11-74), the washers (2-40, CMM 32-12-05

and CMM 32-11-74) and the bolt (2-50, CMM 32-12-05 and CMM 32-11-74).

(h) Remove the nut (2-60, CMM 32-12-05 and CMM 32-11-74) and the jacking dome

(2-70, CMM 32-12-05 and CMM 32-11-74).

(i) Remove the towing bracket subassembly (2-10, CMM 32-12-05 and CMM

32-11-74).

(j) Remove the bolts (2-110, CMM 32-12-05 and CMM 32-11-74), the washers

(2-120, CMM 32-12-05 and CMM 32-11-74) and the locking segment (2-130,

CMM 32-12-05 and CMM 32-11-74).

(k) Use the Holding Tool DRT67093 to hold the axle spigot nut (2-150, CMM

32-12-05 and CMM 32-11-74) and use the Torque Spanner DRT67088 to remove

the spigot (2-140, CMM 32-12-05 and CMM 32-11-74).

(l) Remove the axle spigot nut (2-150, CMM 32-12-05 and CMM 32-11-74).

(m) Remove the diaphragm (2-170, CMM 32-12-05) or (2-160, CMM 32-11-74).

WARNING: DO NOT GET CLEANING AGENTS ON YOUR SKIN, IN YOUR EYES OR

NEAR A FLAME. DO NOT BREATHE THE FUMES. ONLY USE IN A

LOCATION THAT HAS A CONTINUOUS FLOW OF CLEAN AIR.

CLEANING AGENTS ARE POISONOUS AND FLAMMABLE.

(7) Clean all the internal surfaces of the bogie beam (3-180, CMM 32-12-05 and CMM

32-11-74) remove all grease, dirt and loose or damaged paint: refer to CLEANING in

the applicable CMM.

NOTE: Use of pressure washer with water only to remove the main debris

within the bogie beam was found to be effective during the development

of this inspection procedure. Final cleaning by hand will still be

necessary. Make sure all internal surfaces are clean and dry before you

continue with Para 3.A.(8).

(8) Use a boroscope to fully inspect the internal diameter of the bogie beam (3-180, CMM

32-12-05 and CMM 32-11-74) for corrosion or damage to the protective treatments:

refer to CHECK in the applicable CMM and Figures 3 and 4.

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SERVICE BULLETIN

(9) If there is no damage to the protective treatments record this on the proforma in

Appendix D. Measure and record the depth of the protective treatments (cadmium

plate and paint) locations A to H five times with a permascope, record the depths of the

protective treatments. Calculate the average of the five depths and record this in the

table given: refer to Appendix D, Figures 3 and 4.

NOTE: Return a completed copy of Appendix D pages 1, 3, 4 and 5 to the

address shown. This inspection check can be done with the bogie and

dressings and the wheels and brakes attached.

(10) If you find corrosion or damage to the protective treatments: refer to Appendix A of this

Service Bulletin for details of repair.

NOTE: Before repair measure and record the depth of protective treatments

with a permascope on the proforma in Appendix D.

(11) Apply protective treatment ARDROX AV100D to the internal diameter of the bogie

beam (3-180, CMM 32-12-05 and CMM 32-11-74): refer to PCS-2800.

(12) Assemble the diaphragms to the bogie assembly:

(a) Refer to PCS-7302. Apply grease paste, Material Ref. Item 04-578 to:

1 The face of the spigot (2-140, CMM 32-12-05 and CMM 32-11-74) that will

be against the diaphragm (2-170, CMM 32-12-05) or (2-160, CMM

32-11-74).

2 The thread of the spigot (2-140, CMM 32-12-05 and CMM 32-11-74).

3 The rounded part of the axle spigot nut (2-150, CMM 32-12-05 and CMM

32-11-74).

4 The threads of the bolt (2-110, CMM 32-12-05 and CMM 32-11-74).

5 The face of the locking segment (2-130, CMM 32-12-05 and CMM 32-11-74)

that will be against the diaphragm (2-170, CMM 32-12-05) or (2-160, CMM

32-11-74).

6 The curved surface of the diaphragm (2-170, CMM 32-12-05) or (2-160,

CMM 32-11-74) where it will touch the axle (3-10, CMM 32-12-05 and CMM

32-11-74).

(b) Refer to PCS-7200. Apply sealant, Material Ref. Item 09-510A, to the external

diameter of the diaphragm (2-170, CMM 32-12-05) or (2-160, CMM 32-11-74)

where it will touch the bogie beam and axle subassembly (3-1, CMM 32-12-05

and CMM 32-11-74).

(c) Install the diaphragm (2-170, CMM 32-12-05) or (2-160, CMM 32-11-74) in the

bogie beam and axle subassembly (3-1, CMM 32-12-05 and CMM 32-11-74).

Remove all of the unwanted sealant from the joint.

NOTE: Make sure the diaphragm is installed with the flat at the bottom of

the bogie beam assembly.

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SERVICE BULLETIN

(d) Use the Holding Tool DRT67093 to install the axle spigot nut (2-150, CMM

32-12-05 and CMM 32-11-74) in the axle (3-10, CMM 32-12-05 and CMM

32-11-74) and hold it in position.

(e) Install the spigot (2-140, CMM 32-12-05 and CMM 32-11-74) through the

diaphragm (2-170, CMM 32-12-05) or (2-160, CMM 32-11-74) and the axle (3-10,

CMM 32-12-05 and CMM 32-11-74) into the axle spigot nut (2-150, CMM

32-12-05 and CMM 32-11-74).

(f) Use the Torque Spanner DRT67088 to torque the spigot (2-140, CMM 32-12-05

and CMM 32-11-74) to between 100 and 120 N m (73.80 and 88.56 lbf ft).

(g) Remove the Holding Tool DRT67093.

(h) Install the locking segment (2-130, CMM 32-12-05 and CMM 32-11-74), the

washers (2-120, CMM 32-12-05 and CMM 32-11-74) and the bolts (2-110, CMM

32-12-05 and CMM 32-11-74).

(i) Torque the bolts (2-110, CMM 32-12-05 and CMM 32-11-74) to between 3 and 4

N m (27 and 36 lbf in).

(j) Safety the bolts (2-110, CMM 32-12-05 and CMM 32-11-74) with lockwire: refer to

PCS-7610.

(k) Refer to PCS-7200. Apply sealant, Material Ref. Item 09-510A, to:

1 The heads of the bolts (2-110, CMM 32-12-05 and CMM 32-11-74).

2 The joint between the diaphragm (2-170, CMM 32-12-05) or (2-160, CMM

32-11-74) and the bogie beam assembly (3-20, CMM 32-12-05 and CMM

32-11-74).

NOTE: Do not fill the space between the bottom of the diaphragm and

the bogie beam assembly with sealant.

(l) Refer to PCS-7302. Apply grease paste, Material Ref. Item 04-578, to:

1 The diameter and threads of the jacking dome (2-70, CMM 32-12-05 and

CMM 32-11-74).

2 The face of the jacking dome (2-70, CMM 32-12-05 and CMM 32-11-74) that

will touch the towing bracket subassembly (2-10, CMM 32-12-05 and CMM

32-11-74).

3 The threads of the bolt (2-50, CMM 32-12-05 and CMM 32-11-74).

(m) Install the towing bracket subassembly (2-10, CMM 32-12-05 and CMM

32-11-74).

(n) Install the jacking dome (2-70, CMM 32-12-05 and CMM 32-11-74).

(o) Install the nut (2-60, CMM 32-12-05 and CMM 32-11-74).

(p) Torque the nut (2-60, CMM 32-12-05 and CMM 32-11-74) to 136 N m (100 lbf ft)

and then reduce the torque to zero.

(q) Do para (p) two more times.

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(r) Torque the nut (2-60, CMM 32-12-05 and CMM 32-11-74) to 81 N m (60 lbf ft).

NOTE: You can increase the torque to a maximum of 339 N m (250 lbf ft) to

let you install the bolt (2-50, CMM 32-12-05 and CMM 32-11-74).

(s) Install the bolt (2-50, CMM 32-12-05 and CMM 32-11-74), the washers (2-40,

CMM 32-12-05 and CMM 32-11-74) and the nut (2-30, CMM 32-12-05 and CMM

32-11-74).

(t) Torque the nut (2-30, CMM 32-12-05 and CMM 32-11-74) to between 2,70 and

3,15 N m (24 and 28 lbf in).

(u) Install the split pin (2-20, CMM 32-12-05 and CMM 32-11-74) and safety it: refer

to PCS-7610.

(v) Refer to PCS-7200. Apply sealant, Material Ref. Item 09-510A, to:

1 The hexagonal nut of the jacking dome (2-70, CMM 32-12-05 and CMM

32-11-74).

2 The nut (2-60, CMM 32-12-05 and CMM 32-11-74).

3 The bolt (2-50, CMM 32-12-05 and CMM 32-11-74), the washers (2-40,

CMM 32-12-05 and CMM 32-11-74) and the nut (2-30, CMM 32-12-05 and

CMM 32-11-74).

(w) Refer to PCS-7302. Apply grease paste, Material Ref. Item 04-578, to:

1 The face of the spigot (1-160, CMM 32-12-05 and CMM 32-11-74) that will

be against the diaphragm (1-180, CMM 32-12-05 and CMM 32-11-74).

2 The thread of the spigot (1-160, CMM 32-12-05 and CMM 32-11-74). 

3 The rounded part of the axle spigot nut (1-170, CMM 32-12-05 and CMM

32-11-74).

4 The threads of the bolt (1-130, CMM 32-12-05 and CMM 32-11-74). 

5 The face of the locking segment (1-150, CMM 32-12-05 and CMM 32-11-74)

that will be against the diaphragm (1-180, CMM 32-12-05 and CMM

32-11-74).

6 The curved surface of the diaphragm (1-180, CMM 32-12-05 and CMM

32-11-74) where it will touch the axle (3-10, CMM 32-12-05 and CMM

32-11-74).

(x) Refer to PCS-7200. Apply Sealant, Material Ref. Item 09-510A, to the external

diameter of the diaphragm (1-180, CMM 32-12-05 and CMM 32-11-74), where it

will touch bogie beam and axle subassembly (3-1, CMM 32-12-05 and CMM

32-11-74).

(y) Install the diaphragm (1-180, CMM 32-12-05 and CMM 32-11-74) in the bogie

beam and axle subassembly (3-1, CMM 32-12-05 and CMM 32-11-74). Remove

all of the unwanted sealant from the joint.

NOTE: Make sure the diaphragm is installed with the flat at the bottom of

the bogie beam assembly.

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(z) Use the Holding Tool DRT67093 to install the axle spigot nut (1-170, CMM

32-12-05 and CMM 32-11-74) in the axle (3-10, CMM 32-12-05 and CMM

32-11-74) and hold it in position.

(aa) Install the spigot (1-160, CMM 32-12-05 and CMM 32-11-74) through the

diaphragm (1-180, CMM 32-12-05 and CMM 32-11-74) and the axle (3-10, CMM

CMM 32-12-05 and CMM 32-11-74) into the axle spigot nut (1-170, CMM

32-12-05 and CMM 32-11-74).

(ab) Use the Torque Spanner DRT67088 to torque the spigot (1-160, CMM 32-12-05

and CMM 32-11-74) to between 100 and 120 N m (73.80 and 88.56 lbf ft).

(ac) Remove the Holding Tool DRT67093.

(ad) Install the locking segment (1-150, CMM 32-12-05 and CMM 32-11-74), the

washers (1-140, CMM 32-12-05 and CMM 32-11-74) and the bolts (1-130, CMM

32-12-05 and CMM 32-11-74).

(ae) Torque the bolts (1-130, CMM 32-12-05 and CMM 32-11-74) to between 3 and 4

N m (27 and 36 lbf in).

(af) Safety the bolts (1-130, CMM 32-12-05 and CMM 32-11-74) with lockwire: refer to

PCS-7610.

(ag) Refer to PCS-7200. Apply sealant, Material Ref. Item 09-510A, to:

1 The heads of the bolts (1-130, CMM 32-12-05 and CMM 32-11-74).

2 The joint between the diaphragm (1-180, CMM 32-12-05 and CMM

32-11-74) and the bogie beam assembly (3-20, CMM 32-12-05 and CMM

32-11-74).

NOTE: Do not fill the space between the bottom of the diaphragm and

the bogie beam assembly with sealant.

(ah) Refer to PCS-7302. Apply grease paste, Material Ref. Item 04-578, to:

1 The diameter and threads of the jacking dome (1-120, CMM 32-12-05 and

CMM 32-11-74).

2 The threads of the bolt (1-100, CMM 32-12-05 and CMM 32-11-74).

(ai) Install the jacking dome (1-120, CMM 32-12-05 and CMM 32-11-74).

(aj) Install the nut (1-110, CMM 32-12-05 and CMM 32-11-74).

(ak) Torque the nut (1-110, CMM 32-12-05) to 40 N m (30 lbf ft).

NOTE: You can increase the torque to the nearest locking position.

 OR

(al) Torque the nut (1-110, CMM 32-11-74) to 136 N m (100 lbf ft) and then reduce the

torque to zero.

(am) Do para (al) two more times.

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SERVICE BULLETIN

(an) Torque the nut (1-110, CMM 32-11-74) to 81 N m (60 lbf ft).

NOTE: You can increase the torque to a maximum of 339 N m (250 lbf ft) to

let you install the bolt (1-100, CMM 32-12-05 and CMM 32-11-74).

(ao) Install the bolt (1-100, CMM 32-12-05 and CMM 32-11-74), the washers (1-90,

CMM 32-12-05 and CMM 32-11-74) and the nut (1-80, CMM 32-12-05 and CMM

32-11-74).

(ap) Torque the nut (1-80, CMM 32-12-05 and CMM 32-11-74) to between 2,70 and

3,15 N m (24 and 28 lbf in).

(aq) Install the split pin (1-70, CMM 32-12-05 and CMM 32-11-74) and safety it: refer

to PCS-7610.

(ar) Refer to PCS-7200. Apply sealant, Material Ref. Item 09-510A, to:

1 The hexagonal nut of the jacking dome (1-120, CMM 32-12-05 and CMM

32-11-74).

2 The nut (1-110, CMM 32-12-05 and CMM 32-11-74).

3 The bolt (1-100, CMM 32-12-05 and CMM 32-11-74), the washers (1-90,

CMM 32-12-05 and CMM 32-11-74) and the nut (1-80, CMM 32-12-05 and

CMM 32-11-74).

(13) Assemble the 1M and 2M bogie electrical harnesses to the bogie and dressings:

(a) Install the 1M and 2M bogie electrical harnesses through the spigots (1-160 and

2-140, CMM 32-12-05 and CMM 32-11-74).

(b) Apply anti-corrosion compound, Material Ref. Item 05-533, to the threads and

under the heads of the bolts (4-70 and 5-70, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95): refer to M-DLPS709-1.

(c) Install the bracket (4-90 and 5-90, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95), the washers (4-80 and 5-80, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) and the bolts (4-70 and 5-70, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95).

NOTE: Install the earth bonding connection of the 1M and 2M bogie

electrical harnesses to the bolts (4-70 and 5-70).

(d) Torque the bolts (4-70 and 5-70, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) to 10 N m (90 lbf in): refer to M-DLPS1002-1.

(e) Safety the heads of the bolts (4-70 and 5-70, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95) together with lockwire AS44725-2, Material Ref. Item 19-512:

refer to M-DLPS1011-16.

(f) Apply anti-corrosion compound, Material Ref. Item 05-533, to the threads and

under the heads of the bolts (4-50 and 5-50, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95): refer to M-DLPS709-1.

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 12

SERVICE BULLETIN

(g) Install the bolts (4-50 and 5-50, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) through the P-clips (4-60 and 5-60, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95), the washers (4-40 and 5-40, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95) and the nuts (4-30 and 5-30, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95).

(h) Torque the nuts (4-30 and 5-30, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) to 4,5 N m (40 lbf in): refer to M-DLPS1002-1.

(i) Apply anti-corrosion compound, Material Ref. Item 05-533, to the threads and

under the heads of the bolts (4-10 and 5-10, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95): refer to M-DLPS709-1.

(j) Install the washers (4-20 and 5-20, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) and the bolts (4-10 and 5-10, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95).

(k) Torque the bolts (4-10 and 5-10, CMM 32-12-04, CMM 32-11-94 or CMM

32-11-95) to 10 N m (90 lbf in): refer to M-DLPS1002-1.

(l) Safety the heads of the bolts (4-10 and 5-10, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95) together with lockwire AS44725-2, Material Ref. Item 19-512:

refer to M-DLPS1011-16.

(m) Refer to PCS-7200 and apply sealant to:

1 The joint between the bracket (4-90 and 5-90, CMM 32-12-04, CMM

32-11-94 or CMM 32-11-95) and the bogie assembly (CMM 32-12-05 and

CMM 32-11-74).

2 The heads of the bolts (4-70 and 5-70, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95) and the washers (4-80 and 5-80, CMM 32-12-04, CMM

32-11-94 or CMM 32-11-95).

3 The heads of the bolts (4-10 and 5-10, CMM 32-12-04, CMM 32-11-94 or

CMM 32-11-95) and the washers (4-20 and 5-20, CMM 32-12-04, CMM

32-11-94 or CMM 32-11-95).

(14) Connect the 1M and 2M bogie electrical harnesses to the Tachometers: refer to the

Aircraft Maintenance Manual.

(15) Install the bogie and dressings (1-60, CMM 32-12-01 and CMM 32-11-70) to the main

strut and dressings (1-70, CMM 32-12-01 and CMM 32-11-70).

(16) Set the proximity switches and targets: refer to ASSEMBLY in the applicable CMM.

(17) Complete all checks on the main landing gear: refer to the Aircraft Maintenance

Manual.

(18) Lower the aircraft and remove the jacks: refer to the Aircraft Maintenance Manual.

B. Identification

(1) After you have done this Service Bulletin:

- write Service Bulletin number A33/34-32-272 in the applicable aircraft and main

landing gear records.

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 13

SERVICE BULLETIN

Main Landing Gear Complete - Area of Inspection

Figure 1

AREA OF

INSPECTION

A340A4408-1

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 14

SERVICE BULLETIN

Bogie Beam - Area of Inspection

Figure 2

A340A4409-1

Y

Y(SEE FIGURE 4)

Z (SEE FIGURE 3)

Z

BOGIE ASSEMBLY SHOWN WITH DIAPHRAGMS ATTACHED

OTHER PARTS REMOVED FROM ILLUSTRATION FOR CLARITY

THIS LEVEL OF DISASSEMBLY IS NOT REQUIRED

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 15

SERVICE BULLETIN

Bogie Beam - Area of Inspection

Figure 3

SECTION Z-Z

A340A4410-1

AREA OF

INTERNAL

DIAMETER

INSPECTION

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 16

SERVICE BULLETIN

Bogie Beam - Area of Inspection

Figure 4

SECTION Y-Y

AREA OF

INTERNAL

DIAMETER

INSPECTION

(360 DEGREES)

A340A4411-1

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Service Bulletin No. A33/34-32-272

Page 17

SERVICE BULLETIN

4. Messier-Dowty and Messier Services Contacts

A. Refer to the Messier-Dowty website (messier-dowty.com) for the latest list of contact names,

addresses and numbers

Original Equipment Manufacturers

Messier-Dowty Inc.

574 Monarch Avenue

Ajax, Ontario

L1S 2G8 

CANADA

Tel: 905-683-3100

Fax: 905-683-6936

Messier-Dowty Limited

Cheltenham Road

Gloucester

GL2 9QH

ENGLAND

Tel: +44(0)1452 712424

Fax: +44(0)1452 713821

Messier-Dowty SA

Zone Aeronautique L. Breguet

BP10

78142 Velizy Cedex

FRANCE

Tel: +33 146 29 18 00

Fax: +33 146 29 8770

Technical Assistance and Spares Support Centers (TASSC)

Messier-Dowty TASSC

Zone Aeronautique L. Breguet

BP10

78142 Velizy Cedex

FRANCE

Tel: +33 5521 2590 (EAME)

Tel: +14043052626 (AMERICAS)

Tel: +(65) 6245 5688 (ASIA/PACIFIC)

Fax: +33(0)1 46 29 18 18

Email: mdtassc@messier-dowty.com

Repair and Overhaul Facilities

Messier Services R&O Facility

574 Monarch Avenue

Ajax, Ontario

L1S 2G8

CANADA

Tel: 905-683-3100

Fax: 905-683-0378

Messier Services R&O Facility

Meteor Business Park

Cheltenham Road

Gloucester GL2 9QL

ENGLAND

Tel: +44(0)1452 713111

Fax: +44(0)1452 716500

Messier Services R&O Facility

3, rue Antoine de St Exupery, 

BP110

67124 Molsheim Cedex

France

Tel: (33) 38838 9200

Fax: (33) 38838 9399

Messier Services (Asia) Pte. Ltd. 

R&O Facility

21 Loyang Crescent, 

Loyang Industrial Estate

SINGAPORE 508985

Tel: (65) 6545 9455

Fax: (65) 6542 3936

Messier Services R&O Facility - 

Americas

Av. La Noria

Parque Industrial Querétaro

Carretera QRO-SLP, Km. 28.5

Querétaro, QRO 76220

MEXICO

Tel: +52 (442) 19 25 800

Fax:+52 (442) 19 25 801

HYDREP Aéroport de 

Dinard-Pleurtuit-Saint-Malo

Bâtiment 20

BP90154

35801 DINARD Cedex

FRANCE

Tel: (33) 2 99 82 79 79

Fax: (33) 2 99 82 79 97

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

INTENTIONALLY BLANK

Service Bulletin No. A33/34-32-272

Page 18

SERVICE BULLETIN
Messier-Dowty Ltd

Appendix A

Service Bulletin No. A33/34-32-272

Page 1 of 6

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821

SERVICE BULLETIN

APPENDIX A

METHOD OF REPAIR TO THE BOGIE BEAM PROTECTIVE TREATMENTS

1. Procedure

A. Method of repair to the bogie beam if the paint has lifted or if scratched or damaged paint is

found or if damage/corrosion or cracking of the bogie beam are found refer to CMM

32-12-05, CMM 32-11-74 and Messier-Dowty Standard Practices Manual 20-00-10.

B. The Process Specifications (M-DLPS, M-DLNDT and PCS) are in the Standard Practices

Manual.

(1) Before damage to the paint, the protective treatment or the base material are repaired. 

(a) Measure and record the depth of protective treatments A to H with a permascope:

refer to Appendix D, Figure 3.

NOTE: Record the measurements and return a completed copy of Appendix D,

Figure 4, to the address shown in Appendix D.

(2) If the paint is damaged locally mask the surrounding area and strip the paint: refer to

PCS-2700.

 OR

(3) Carefully remove damaged paint using Scotchbrite or fine emery paper.

(a) Measure area of paint removed.

NOTE: Measure and record the dimensions and location of the reworked

area in Appendix D, Figure 2. Return a completed copy of

Appendix D to the address shown in Appendix D.

(4) Visually check the cadmium plating.

(a) If the cadmium plating is satisfactory (yellow/brown in color)

NOTE: Check the depth of cadmium plating with a Permascope. The depth

of cadmium plating must be 0,01 to 0,02 mm (0.0004 to 0.0008 in).

(b) If the cadmium plating depth is satisfactory

1 Apply paint: refer to PCS-2500.

NOTE: Before applying top coat apply 2 coats of primer with a total of

0,04 to 0,05 mm (0.0015 to 0.002 in) dry film thickness.

2 Measure the depth of paint with a permascope.

NOTE: The depth of paint with primer and top coat applied must be

0,09 mm (0.0035 in) minimum dry film thickness.

(c) If the cadmium plating is damaged (grey in color) or the plating depth is not

satisfactory but the base material is not corroded

1 Carefully remove the cadmium plating using Scotchbrite or fine emery

paper.

Nov 16/2007

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix A

Service Bulletin No. A33/34-32-272

Page 2

SERVICE BULLETIN

2 Measure area of cadmium plate removed

NOTE: Measure and record the dimensions and location of the reworked

area in Appendix D, Figure 2. Return a completed copy of

Appendix D to the address shown in Appendix D.

(d) Check to make sure the base material is not corroded

1 Apply cadmium plate: refer to PCS-2141 and Appendix C of this Service

Bulletin.

NOTE: Messier-Dowty Limited tells you that you can cadmium plate

to a maximum area of 46451,52 mm square (72 square in) but

you must only do it in steps of 7741,92 mm square (12 square

in) maximum area at a time. The area around the 7741,92 mm

square (12 square in) must be masked off before you cadmium plate.

NOTE: If you have used cadmium plating solution and a procedure

that has satisfactorily passed the hydrogen embrittlement test

in AMS2451/4 then de-embrittlement of the bogie beam after

cadmium plating is not required.

2 Check the depth of cadmium plating with a Permascope.

NOTE: The depth of cadmium plating must be 0,01 to 0,02 mm

(0.0004 to 0.0008 in).

3 Apply paint: refer to PCS-2500.

NOTE: Before applying top coat apply 2 coats of primer with a total of

0,04 to 0,05 mm (0.0015 to 0.002 in) dry film thickness.

4 Measure the depth of paint with a permascope.

NOTE: The depth of paint with primer and top coat applied must be

0,09 mm (0.0035 in) minimum dry film thickness.

(5) If the base material has corrosion or damage

(a) Use Scotchbrite, fine emery paper or low powered hand tools to locally repair the

corroded or damaged area: refer to M-DLPS1004-4-1 and Figure 1 or Figure 2 of

this Appendix. 

WARNING: BLEND RADIUS MUST BE APPLIED ALL AROUND THE REWORKED

AREA. MAKE SURE ALL BLENDS ARE SMOOTH.

(b) The depth of material removal must be kept to a minimum making sure corrosion

or damage is removed. The maximum permitted depth of material removal is:

1 0,30 mm (0.012 in), this can be done to the internal diameter along the

length of the bogie beam: refer to Figure 1.

 OR

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix A

Service Bulletin No. A33/34-32-272

Page 3

SERVICE BULLETIN

2 0,40 mm (0.015 in), this can be done internally but only over the limited

width shown: refer to Figure 2.

NOTE: The blend radius must be minimum 10,00 mm (0.394 in) in

Area A or minimum 100,00 mm (3.937 in) in Area B within the

positions shown: refer to Figure 1 or Figure 2.

(c) Measure the depth and area of material removed.

NOTE: Measure and record the depth, dimensions and location of the

reworked area in Appendix D, Figure 2. Return a completed copy

of Appendix D to the address shown in Appendix D.

(d) Inspect the repaired area for corrosion or cracking: refer to M-DLNDT 17 and

Appendix B of this Service Bulletin.

NOTE: If after NDT you continue to find indications of corrosion or

cracking. Remove all indications of corrosion or cracking. If the

reworked dimensions are larger than those given in Figures 1 and

2. Contact your regional Messier-Dowty Technical Assistance and

Spares Support Center.

(e) If the depth of material removed is more than 0,038 mm (0.0015 in) rotary flap

peen the repaired area: refer to PCS-2302.

(f) Apply cadmium plate: refer to PCS-2141 and Appendix C of this Service Bulletin.

NOTE: Messier-Dowty Limited tells you that you can cadmium plate to a

maximum area of 46451,52 mm square (72 square in) but you must

only do it in steps of 7741,92 mm square (12 square in) maximum

area at a time. The area around the 7741,92 mm square (12 square

in) must be masked off before you cadmium plate.

NOTE: If you have used cadmium plating solution and procedure that has

satisfactorily passed the hydrogen embrittlement test in

AMS2451/4 then de-embrittlement of the bogie beam after

cadmium plating is not required.

(g) Check the depth of cadmium plating with a Permascope.

NOTE: The depth of cadmium plating must be 0,01 to 0,02 mm (0.0004 to

0.0008 in).

(h) Apply paint: refer to PCS-2500.

NOTE: Before applying top coat apply 2 coats of primer with a total of 0,04

to 0,05 mm (0.0015 to 0.002 in) dry film thickness.

(i) Measure the depth of paint with a permascope.

NOTE: The depth of paint with primer and top coat applied must be 0,09

mm (0.0035 in) minimum dry film thickness.

(6) After you have done this repair refer to this Service Bulletin and continue with step

3.A.(12).

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix A

Service Bulletin No. A33/34-32-272

Page 4

SERVICE BULLETIN

Bogie Beam - Area of Repair

Figure 1

100,00mm

(3.937in)

RADIUS

BOGIE

PIVOT 

POINT

0,30mm (0.012in) MAXIMUM DEPTH REMOVAL

MAY BE USED AT ANY POSITION ALONG

THE LENGTH AND AROUND THE INTERNAL

CIRCUMFERENCE OF THE BOGIE BEAM A340A4444-1

0,30mm (0.012in)

MAXIMUM

100,00mm (3.937in) MINIMUM IN AREA B

or

10.00mm (0.0394in) MINIMUM IN AREA A

BLEND RADIUS WITHIN

THE POSITION SHOWN

(SEE VIEW ABOVE)

AXLE

238,85mm (9.404in)

DIAMETER

AREA B

REMOVE DAMAGED PROTECTION

AND ANY CORRODED MATERIAL. USE

100mm (3.937in) MINIMUM

BLEND RADIUS

WITHIN THIS 

LENGTH

20,00mm (0.787in)

MAKE EDGES SMOOTH

10,00mm (0.394in)

MINIMUM BLEND RADIUS

AREA A

REMOVE DAMAGED PROTECTION

AND ANY CORRODED MATERIAL. USE

10mm (0.394in) MINIMUM BLEND RADIUS

WITHIN THIS LENGTH

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix A

Service Bulletin No. A33/34-32-272

Page 5

SERVICE BULLETIN

Bogie Beam - Area of Repair

Figure 2

100,00mm (3.937in)

RADIUS

20,00mm (0.787in)

15 DEGREES

15 DEGREES

IF REQUIRED 0,40mm (0.015in) MAXIMUM REMOVAL

MAY BE USED AT ANY POSITION ALONG THE LENGTH AND

AROUND THE INTERNAL CIRCUMFERENCE OF THE BOGIE BEAM

ONLY WITHIN THE AREA INDICATED

0,40mm (0.015in)

MAXIMUM

238,85mm

(9.404in)

DIAMETER

A330A4445-1

BOGIE

PIVOT POINT

AXLE

10,00mm (0.394in) MINIMUM IN AREA A

or 100,00mm (3.937in) MINIMUM IN AREA B

BLEND RADIUS

WITHIN THE POSITIONS SHOWN

(SEE VIEW ABOVE AND BELOW)

MAXIMUM WIDTH OF REPAIR

62,53mm (2.462in)

AREA B

REMOVE DAMAGED PROTECTION

AND ANY CORRODED MATERIAL. USE

100mm (3.937in) MINIMUM

BLEND RADIUS

WITHIN THIS 

LENGTH

AREA A

REMOVE DAMAGED PROTECTION

AND ANY CORRODED MATERIAL. USE

10mm (0.394in) MINIMUM BLEND RADIUS

WITHIN THIS LENGTH

MAKE EDGES SMOOTH

10,00mm (0.394in)

MINIMUM BLEND RADIUS

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

INTENTIONALLY BLANK

Appendix A

Service Bulletin No. A33/34-32-272

Page 6

SERVICE BULLETIN
Messier-Dowty Ltd

Appendix B

Service Bulletin No. A33/34-32-272

Page 1 of 6

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821

SERVICE BULLETIN

APPENDIX B

MESSIER-DOWTY LIMITED GLOUCESTER

NDT PRODUCT SUPPORT TECHNIQUE NO. PS 351ET ISSUE 2

EDDY CURRENT INSPECTION OF AIRBUS A330/340 MAIN LANDING GEAR BOGIE BEAM

1. Scope

A. This NDT technique is designed to detect cracking in the bogie beam bore, following the

repair of visually identified areas of corrosion. 

NOTE: The inspection area is limited to locally repaired areas of the bore only.

B. The repaired areas are to have a 100% complete Eddy Current inspection check.

C. The controlling specification for this technique is Messier-Dowty Limited NDT17.

2. Equipment Required

A. The equipment required to do the inspection is listed below

(1) Phasec 2d, Eddy Current Flaw Detector.

(2) Calibration Block DRT95819: refer to Figure 1. The block contains a total of 4

calibration slots (0,2mm and 0,6mm slots in both the longitudinal and circumferential

directions).

(3) Probe, Shielded Spade, 500kHz.

 OR

(4) Probe, Shielded Pencil, 500kHz.

NOTE: The settings detailed in 5.A(1) are relevant to the specified equipment

only. This inspection may be achieved with the use of similar

equipments with phase discrimination capabilities when specifically

agreed by the approved NDT Level 3 specialist nominated by

Messier-Dowty Limited.

3. Personnel

A. The inspection procedure is to be carried out by NDT personnel who are certified to EN4179

level 2 (or equivalent - as agreed by the Messier-Dowty Limited Nominated Level 3) in the

Eddy Current method as detailed in Messier-Dowty Limited NDT10.

4. Preparation

A. Before the inspection technique can continue

(1) Make sure the bogie beam is removed from the aircraft. 

(2) Make sure the inspection area is thoroughly clean, degreased and free from any

foreign matter. Inspection shall take place after repair and before protective treatments

have been applied.

Nov 16/2007

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix B

Service Bulletin No. A33/34-32-272

Page 2

SERVICE BULLETIN

5. Examination Procedure

A. Instrument Settings

(1) Press ‘Menu’ and install the settings listed in the table that follows.

(2) Sensitivity

(a) Connect the probe and lead to the test set. Select the operating screen. Position

probe on the purpose made Calibration Block DRT95819, away from slots and

edges. Do a 2 second press of the ‘Exec/Load’ button to automatically select.

(b) Do a 2 second press of the ‘Balance/lift-off’ button to initiate automatic probe

balancing and lift off adjustment. Manually adjust the lift off signal phase angle to

the 9 o’clock position if required. 

GAIN XY 1 20.0/40.0 ACTIVE None MODE Normal Single

PHASE As reqd ACTION Off PROBE ID Unknown

FREQ 1 KHZ 500 STRETCH 50 Ms LOAD UH 47

FILTER 1 BP Ratio SHAPE Sector DRIVE DB 0

HP/LP 1 DC/200 TOP/BTM Off/Off BAL/CLR MOD Single

INPUT GAIN Low LFT/RGHT Off/Off

PROBE 1 Locator START/END Off/Off POWER DOWN Off

IN/OUTER Off/Off KEY CLICK Off

CONTRAST As reqd

DISPLAY Spot SCREEN MODE Normal

GRATICULE Grid 1

SPOT XY 98/-25 RESET Exec

SPOT INFO None TRACE THICKEN Off

PERSIST 0.5S LANGUAGE English

SWEEP 0.5S BAUD 115200

TIME As reqd

SAVE Setup DATE As reqd

ANALOGUE O/P 1 X1 RECALL Setup

ANALOGUE O/P 2 X1 TRACE REC Off CODE Exec

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix B

Service Bulletin No. A33/34-32-272

Page 3

SERVICE BULLETIN

(c) Slide the probe tip over the 0,2mm depth circumferencial slot in the longitudinal

direction (at 90 Degrees to slot length) and set the gain to give a working spot

deflection of 2 main scale divisions, or a minimum of 40% full screen height if an

alternative Eddy Current Flaw detector is used.

(d) Re-check the sensitivity setting by moving the probe off, balancing, and then back

over the slot as necessary to achieve a consistent calibration and sensitivity

setting. If necessary, adjust the gain to achieve the detailed working spot

deflection and the phase angle such that the lift off signal is horizontal and the

calibration signal from the 0.2mm slot is vertical. See Figure 2. Make sure the

sensitivity and phase relationship is as Figure 2 and adjust as necessary.

(e) Check the response of the equipment by running the probe over the 0,6 mm

depth circumferencial slot, and ensure the associated increase in amplitude.

B. Procedure

NOTE: The inspection procedure is to be carried out by NDT personnel who are

certified to EN4179 level 2 (or equivalent - as agreed by the Messier-Dowty

Ltd Nominated Level 3) in the Eddy Current method as detailed in

Messier-Dowty Limited NDT10.

(1) Place the probe on component, balance probe and check lift off. Ensure sensitivity and

phase relationship is as Figure 2 and adjust as necessary.

(2) To assist with scanning and coverage of the inspection area, when possible create a

10mm x 10mm grid pattern over the complete repaired/test area and do a series of

horizontal scans at 1mm increments with an overlap of grid lines ensuring 100%

coverage of the scan area. Re-balance at each new grid square. When such a grid

pattern cannot be achieved, do a series of vertical and horizontal scans at 1mm

increments ensuring 100% coverage of the repaired/test area.

(3) Repeat para 5.A.(2)(b), Para 5.A.(2)(c) and Para 5.A.(2)(d) using the 0,2mm depth of

axial slot and Para 5.A(2)(e) using the 0,6 mm depth axial slot. 

(4) Repeat para 5.B(1) and 5.B(2) in the opposite direction at 90 Degrees to the direction

of the initial scan.

C. Examination standard

(1) Any indication (regardless of amplitude) that cannot be attributed to edge effect,

geometry, lift off or probe handling is to be considered a “relevant indication”. All

indications are to be reported, showing their position and length. 

(2) The indication length is to be measured from a vertical spot movement of 1 main scale

division while scanning towards the indication at 90 Degrees to the major dimension of

the indication.

D. Reporting procedure

(1) All indications are to be reported showing indication position, length and direction. If

possible equipment screen displays, showing both lift off signals and indication signals,

should be obtained and included in the report.

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix B

Service Bulletin No. A33/34-32-272

Page 4

SERVICE BULLETIN

E. Estimated manhours

(1) As required.

F. Additional information

(1) Any suspect indications shall be cause for rejection and for further investigation.

(2) If this instruction cannot be successfully completed the inspection is to cease and the

relevant NDT Level 3 informed. 

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix B

Service Bulletin No. A33/34-32-272

Page 5

SERVICE BULLETIN

Calibration Block - DRT95819

Figure 1

Screen Display

Figure 2

 Slots A1 and A2

0,2 mm ± 0,02 mm 

depth x 5.0 mm ± 0,1 

mm long. Slot width 

0,063/0,125 mm

 Slots B3 and B4

0,6 mm ± 0,02 mm 

depth x 5.0 mm ± 0,1 

mm long. Slot width 

0,063/0,125 mm

LIFT OFF SIGNAL AT 9 O'CLOCK

0,2mm SLOT SIGNAL RESPONSE

A340A4483-1

One mainscale 

division

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

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Appendix B

Service Bulletin No. A33/34-32-272

Page 6

SERVICE BULLETIN
Messier-Dowty Ltd

Appendix C

Service Bulletin No. A33/34-32-272

Page 1 of 4

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821

SERVICE BULLETIN

APPENDIX C

PROCEDURE FOR LOW EMBRITTLEMENT BRUSH CADMIUM PLATING THE BOGIE BEAM

1. Scope

A. Method of cadmium plating the bogie beam: refer to PCS-2141 and Messier-Dowty

Standard Practices Manual 20-00-10.

B. This appendix describes the materials and procedures for the local deposition of cadmium

on steels of all strength levels and on non-ferrous alloys.

C. The process is to be used to re-protect surfaces which have been reworked after damage

during manufacture or in service, or to apply a supplementary plating to bare areas resulting

from jigs or fixtures during bath plating.

D. General details of the equipment required are given in M-DLPS118, Brush Plating.

E. No reference is made to details of procedure normally associated with proper shop practice

and good workmanship. Specific training in the skills of brush plating is a requirement of this

specification.

2. Associated Specifications

A. M-DLPS100 Cadmium Plating.

B. M-DLPS118 Brush Plating.

C. M-DLPS131 Cadmium Plating of Ultra-high Tensile Steels.

D. ISO 9227 ) Salt Spray Corrosion Tests in artificial atmospheres.

 (BS 7479) )

3. Health and Safety

A. The plating operation must be carried out in a well ventilated area with local fume extraction

as cadmium is toxic and the fumes evolved during plating are irritants. Consult the plating

solution supplier's health and safety data sheet for further information.

B. Rubber or plastic gloves must be worn for the cleaning and plating processes.

C. After using this process, hands must be thoroughly washed.

D. There must be no eating, drinking or smoking in the workshop.

4. Solutions Required

A. Plating Solutions

(1) Plating solutions approved for use against this specification are:

(a) Selectron LHE Cadmium Plating Solution Code No SPS-5070.

 or

(b) Selectron Cadmium (No Bake) Solution Code No 2023/1.

 or

Nov 16/2007

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

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Service Bulletin No. A33/34-32-272

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SERVICE BULLETIN

(c) Metadalic Cadmium Plating Solution Code No 2023.

NOTE: Alternative plating solutions certified to meet the hydrogen

embrittlement test requirements of AMS2451/4 can be used.

B. Passivation Solution

(1) Sodium Dichromate: 135 - 175g

(2) Sulphuric Acid: 5 - 8g

(3) Water, to make: 1 litre

5. General Requirements

A. Thorough operator training is essential. All brush plating operators are required to hold a

certificate of competence. An operator training service is offered by Sifco Selective Plating

Ltd and by Metadalic Ltd.

B. Polish to remove corrosion using hand tools: refer to M-DLPS1004-4-1.

C. Shot peened surfaces which have been reworked, must be re-shot peened or flap peened

prior to brush plating.

D. Where brush cadmium plating is called for as a supplement to bath plating, it should

wherever possible, be carried out immediately following bath plating and before

de-embrittlement. When this process is used to repair damaged cadmium, or parts reworked

as in paragraph 5.C. de-embrittlement is not required.

E. Unless otherwise stated on the Drawing, the minimum thickness of plate shall be 10 μm

(0.0004 in).

6. Procedure

A. Degrease the area to be plated, including the surrounding area, with a solvent and wipe dry

with a cloth or absorbent paper.

B. Mask as necessary, to define the plating area. When repairing a previously cadmium plated

area, the brush plating must overlap the existing cadmium by about 4 mm (0.157 in).

C. Abrade the area to be plated, using a water wetted abrasive paper or fine Scotch-Brite pad.

Rinse and wipe dry with a clean tissue or absorbent cloth.

D. Before plating begins, the area must be wetted with the plating solution, ensuring freedom

from liquid breaks. If necessary the area must be further cleaned to provide a liquid-break

free condition.

E. Soak a tampon with the plating solution and start the appropriate tampon movement over

the plating area, before switching on the current.

F. Plate at 15 - 20V until a visible layer of cadmium has formed, then reduce the voltage to

achieve 0,93A/cm2 (6A/in2) of anode contact area. Continue plating until the calculated

ampere hours have elapsed. To calculate the ampere hours required, consult the technical

data provided by the plating solution supplier:

 FACTOR X AREA X THICKNESS OF PLATING = AMPERE HOURS

G. Rinse in cold water.

Sep 22/2008 (Revision 1)
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Appendix C

Service Bulletin No. A33/34-32-272

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SERVICE BULLETIN

H. If the process has been carried out as re-work, swab with the passivating solution until a

light golden colour is obtained. This cannot normally be expected to produce a good

cosmetic match, but the corrosion protection will be fully restored. Rinse in cold water and

dry by wiping with a clean cloth or absorbent paper or by means of an air blast.

7. Removal of Defective Deposits

A. Defective deposits may be removed by reversing the polarity (i.e. with the component

connected to the anode lead and the tampon connected to the cathode and anodically

stripping the plate). Replating can be carried out from 6.D using a freshly prepared tampon.

8. Inspection

A. The appearance of the plate shall be smooth, and free from porosity and burned areas. The

plated area shall blend with the surrounding plating although appearance mis-match is

inevitable and acceptable.

B. The passivation treatment shall be adherent and free from powder.

C. There shall be no evidence of separation of the plate when tested as follows:

(1) Apply a strip of 3M's No 250 tape using firm finger pressure and then remove the tape

by pulling rapidly in a perpendicular direction. Examine the adhesive side of the tape

for the presence of cadmium plate.

D. The thickness of the plate shall be a minimum of 10 μm (0.00004 in) unless otherwise

specified.

E. Thickness shall be measured using a calibrated electronic instrument, such as the Fischer

Permascope.

9. Quality Control

A. Each operator shall produce a test panel annually to demonstrate satisfactory performance.

(1) A 15 x 10 cm (6 x 4 in) low alloy steel test panel shall be dull cadmium plated to

M-DLPS100 all over, except for an area of approximately 10 x 5 cm (4 x 2 in) on one

face, which shall be left bare.

(2) Brush cadmium plate the bare area to this specification.

B. The brush plated deposit shall meet the inspection requirements of paragraph 8 above and

after 336 hours salt spray test to ISO 9227 NSS test there shall be no rusting of the base

metal.

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

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Appendix C

Service Bulletin No. A33/34-32-272

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SERVICE BULLETIN
Messier-Dowty Ltd

Appendix D

Service Bulletin No. A33/34-32-272

Page 1 of 6

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821

SERVICE BULLETIN

APPENDIX D

AIRBUS A330/340 - MAIN LANDING GEAR - BOGIE AND DRESSINGS

PROFORMA FOR REPORTING RESULTS OF INSPECTION SERVICE BULLETIN A33/34-32-272.

Customer Details Address From Which The Item Has Been Sent

Contact Name:

Contact Tel. Number:

Contact Fax Number:

Regional CSC:

Aircraft Details

Operator: Aircraft Type:

Aircraft MSN: Aircraft TSN: Aircraft CSN:

M.L.G Serial No: M.L.G TSN: M.L.G CSN:

Bogie and Dressings LH MLG or RH MLG (tick box as necessary) Details

Part Number: TSN:

Serial No: CSN:

Bogie Beam LH MLG or RH MLG (tick box as necessary) Details

Part Number: TSN:

*Serial No (see page 3): CSN:

Return Address For Proforma Appendix D

MR D . PARSONS,

SENIOR TECHNICAL TEAM LEADER,

MESSIER-DOWTY CUSTOMER SERVICES

DEPARTMENT,

MESSIER DOWTY LIMITED,

CHELTENHAM ROAD,

GLOUCESTER,

GL2 9QH,

ENGLAND,

FAX No: + 44 01452 711972.

Nov 16/2007

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix D

Service Bulletin No. A33/34-32-272

Page 2

SERVICE BULLETIN

Bogie Beam - Developed View of Bogie Beam Bore - Area of Repair

Figure 1

A340A4505-1

A

XXXmm

(XXXin)

XXXmm

(XXXin)

XXXmm

(XXXin)

XXXmm

(XXXin)

XXXmm

(XXXin)

XXXmm

(XXXin)

Z Z

BOGIE

PIVOT

CENTERLINE

AXLE

AXLE

FWD

AFT

DEVELOPED VIEW OF BOGIE BEAM BORE

KEY

BASE MATERIAL

CADMIUM PLATE

PAINT

THIS IS AN EXAMPLE OF HOW

TO RECORD DIMENSIONS AND

LOCATION OF REWORKED AREA

DAMAGE

FOUND

NO

DAMAGE

FOUND

RECORD RESULTS ON PAGE 3

OF APPENDIX D.

RETURN PAGES 1, 3 AND 5

OF APPENDIX D

RETURN PAGE 1, 4 AND 5

OF APPENDIX D

0

DEGREES

360

DEGREES

180

DEGREES

270

DEGREES

90

DEGREES

REWORK AREA

VIEW ON ARROW A

XXX DEGREES

0/360

DEGREES

180

DEGREES

270

DEGREES

90

DEGREES

PART SECTION Z-Z

XXXmm (XXXin)

MAXIMUM DEPTH

OF BLEND

XXXmm (XXXin)

WIDTH

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix D

Service Bulletin No. A33/34-32-272

Page 3

SERVICE BULLETIN

USE THE ILLUSTRATION BELOW TO MARK THE LOCATION OF REPAIR

Bogie Beam - Developed View of Bogie Beam Bore - Area of Repair

Figure 2

A340A4506-1

REWORK AREA

VIEW ON ARROW A

A

BOGIE PIVOT

CENTERLINE

DEVELOPED VIEW OF BOGIE BEAM BORE

MEASURE REWORKED AREA.

RECORD DIMENSIONS AND

LOCATION ON THIS DIAGRAM

DAMAGE

FOUND

NO DAMAGE

FOUND

(TICK BOX AS NECESSARY)

AIRCRAFT MSN

BOGIE BEAM

SERIAL NUMBER

AIRCRAFT DETAILS

* LOCATION OF

BOGIE BEAM

SERIAL NUMBER

FWD

PART SECTION Z-Z

(REFER TO FIGURE 1)

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix D

Service Bulletin No. A33/34-32-272

Page 4

SERVICE BULLETIN

Bogie Beam - Developed View of Bogie Beam Bore - Protective Treatment Depth Measurement 

Locations

Figure 3

90

DEGREES

A340A4822-1

A

BOGIE PIVOT

CENTERLINE

DEVELOPED VIEW OF BOGIE BEAM BORE

FWD

0

DEGREES

360

DEGREES

180

DEGREES

270

DEGREES

90

DEGREES

VIEW ON ARROW A

0 / 360

DEGREES

270

DEGREES

180

DEGREES

100,0mm

(3.937in)

D

C

A

B

E

F

H

G

100,0mm

(3.937in)

100,0mm

(3.937in)

100,0mm

(3.937in)

100,0mm

(3.937in)

100,0mm

(3.937in)

100,0mm

(3.937in)

100,0mm

(3.937in)

240

DEGREES

120

DEGREES

240

DEGREES

120

DEGREES

MEASURE THE PROTECTIVE

TREATMENT DEPTH AT

LOCATIONS SHOWN AND

RECORD DIMENSIONS IN THE

TABLE ON PAGE 5

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

Appendix D

Service Bulletin No. A33/34-32-272

Page 5

SERVICE BULLETIN

Bogie Beam - Developed View of Bogie Beam Bore - Protective Treatment Depth Measurements

Figure 4

MEASURE THE PROTECTIVE TREATMENT DEPTH AT

THE LOCATIONS SHOWN IN FIGURE 3 AND

RECORD DIMENSIONS IN THIS TABLE 

D

C

A

B

E

F

H

G

1 234 5 AVERAGE

MEASURMENT

MEASUREMENTS IN AREAS A TO H MUST BE DONE WHERE THE PAINT IS NOT DAMAGED.

IF THIS IS NOT POSSIBLE MEASURE AT THE NEAREST POINT WHERE PAINT IS NOT DAMAGED.

FIVE MEASUREMENTS ARE NECESSARY AT EACH LOCATION.

A340A4930-1

Sep 22/2008 (Revision 1)
Messier-Dowty Ltd

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Appendix D

Service Bulletin No. A33/34-32-272

Page 6

SERVICE BULLETIN
Messier-Dowty Ltd

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

Telephone: +44 (0) 1452 712424 Fax: +44 (0) 1452 713821

SERVICE BULLETIN

AIRBUS A330/A340 MAIN LANDING GEAR

SERVICE BULLETIN A33/34-32-272

TRANSMITTAL LETTER FOR REVISION 1

DATED SEP 22/2008

1. REASON

A. To add note to Para 2.D.(2) Tooling.

B. To update Accomplishment Instructions.

C. To update Messier-Dowty and Messier Services contacts table.

D. To update procedure in Appendix A.

E. Remove Para 2.A.(5) and update Figure 1 in Appendix B.

F. To update illustration and add two new illustrations in Appendix D.

2. ACTION

A. Remove and destroy existing pages 1 to 16 and substitute revised pages 1 to 18 dated

Sep 22/2008.

B. Remove and destroy the existing Appendix A pages 1 to 6 and substitute revised pages 1 to

6 dated Sep 22/2008.

C. Remove and destroy the existing Appendix B pages 1 to 6 and substitute revised pages 1 to

6 dated Sep 22/2008.

D. Remove and destroy the existing Appendix C pages 1 to 4 and substitute revised pages 1 to

4 dated Sep 22/2008.

E. Remove and destroy the existing Appendix D pages 1 to 4 and substitute revised pages 1 to

6 dated Sep 22/2008.

3. PREVIOUS REVISION/ISSUE DETAILS

Revision Status Date

A. Initial Issue Nov 16/2007
Messier-Dowty Ltd

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SERVICE BULLETIN