Service Bulletin No. A33/34-32-284

Page 1 of 12

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

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

SERVICE BULLETIN

Messier-Dowty Ltd

 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)

This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property rights are

granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the

express written consent of Messier-Bugatti-Dowty.

Safran and Messier-Bugatti names are marks owned respectively by Safran and Messier-Bugatti-Dowty companies. The mark Dowty is

used under licence.

LANDING GEAR - MAIN LANDING GEAR - BOGIE AND DRESSINGS - INTRODUCTION OF A NEW 

BOGIE AND DRESSINGS WITH A NEW TWO COAT PAINT PROCEDURE

1. Planning Information

A. Effectivity

Aircraft affected: AIRBUS A330 and A340 

Unit affected: Bogie and Dressings

which includes:

Bogie Assembly

Part/Type Nos.: 201486003 and 201486004 (Bogie and Dressings)

which includes:

201272004 (Bogie Assembly)

OR

201486001 and 201486002 (Bogie and Dressings)

which includes:

201485 Series (Bogie Assembly)

OR

201274 Series (Bogie and Dressings)

which includes:

201272 Series (Bogie Assembly)

B. Concurrent Requirements

(1) Messier-Dowty Limited tells operators that Service Bulletins A33-34/32-41,

A33/34-32-175, A33/34-32-176, A33/34-32-193, A33/34-32-194 and A33/34-32-278

must be done before or at the same time you do this Service Bulletin.

C. Reason

(1) Fracture of a bogie beam has occured in-service due to corrosion in the bore.

Investigation showed thin paint coats and paint deterioration.

D. Description

(1) Messier-Dowty Limited tells operators that a new bogie and dressings is introduced.

The new bogie and dressings has:

- a new two coat paint procedure applied

- the bogie beam protective treatments checked for thickness after they are applied

- a new protective treatment Ardrox AV100D applied to the bore of the bogie beam

after paint

MAF1-0002-0149

May 11/2010

Jul 10/2012 (Revision 1)
Service Bulletin No. A33/34-32-284

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SERVICE BULLETIN

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- a new part number bogie beam, bogie beam subassembly and bogie beam, and

axle. The new part numbers will show that the two coat paint procedure and Ardrox

AV100D are applied and the protective treatments checked for thickness.

(2) Messier-Dowty Limited recommend that you do this Service Bulletin on main landing

gears on which:

- the strike number 25 has not been cancelled on the bogie and dressings

nameplate and looks like this .

(3) Messier-Dowty Limited tells you that new manufacture will include this Service Bulletin

on main landing gears on which:

- the strike number 25 has been cancelled on the bogie and dressings nameplate

and looks like this 

- the part number of the new bogie and dressings starts 201486003-030.

(4) Messier-Dowty Limited tells operators to re-identify, in-service, bogie beams that by

records have had the correct protective treatments applied and checked at new

manufacture.

(a) Appendix A of this Service Bulletin has the serial numbers of the bogie beams

which have had the correct protective treatments applied.

NOTE: If you have a bogie beam which has a serial number shown in the

table in Appendix A, you must re-identify the bogie beam, the bogie

assembly and the bogie beam and axle subassembly: refer to Para

3.A. of this Service Bulletin.

E. Compliance

(1) Recommended

(a) At next overhaul.

(2) Refer to Airbus Service Bulletins A330-32-3237 and A340-32-4279.

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 3 man-hours to

identify each bogie beam with a new part number: refer to Para 3.A.

(2) Messier-Dowty Limited tells you no more man hours are necessary when you do this

Service Bulletin at overhaul or shop visit.

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.

25

25

Jul 10/2012 (Revision 1)
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SERVICE BULLETIN

Messier-Dowty Ltd

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 Limited Service Bulletin A33/34-32-278.

(9) Messier-Dowty Limited Service Bulletin A33/34-32-194.

(10) Messier-Dowty Limited Service Bulletin A33/34-32-193.

(11) Messier-Dowty Limited Service Bulletin A33/34-32-176.

(12) Messier-Dowty Limited Service Bulletin A33/34-32-175.

(13) Messier-Dowty Limited Service Bulletin A33/34-32-41.

(14) Messier-Dowty Limited Modification Form No. MAF1-0002-0149, issue 3.

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

(16) Airbus Service Bulletin A330-32-3237 and A340-32-4279.

(17) Airbus Modification No. 58896.

(18) Airbus Airworthiness Limitation Section Part 1.

(19) Aircraft Maintenance Manual.

NOTE: This Service Bulletin is subject of aircraft modification No. 58896 and is

covered by aircraft Service Bulletins A330-32-3237 and A340-32-4279. When

you do this Service Bulletin the modified equipment can not be installed on

the aircraft type unless the related aircraft modification and, if applicable, its

aircraft Service Bulletin are approved.

J. Other Publications Affected

(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.

2. Material Information

A. Material - Price and Availability

Jul 10/2012 (Revision 1)
Service Bulletin No. A33/34-32-284

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SERVICE BULLETIN

Messier-Dowty Ltd

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

December 31st 2012. 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

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 New Part 

Price 

($US)

201486003-030 1 Bogie and Dressings

which includes

201486003-025 (F) 01 -

201272004-020 1 .Bogie Assembly 201272004-015 (F) 01 -

201272248 1 ..Bogie Beam and Axle 

Subassembly

which includes:

201272236 (F) 01 -

201272245 1 ...Bogie Beam 

Subassembly

which includes:

201272235 (F) 01 -

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SERVICE BULLETIN

Messier-Dowty Ltd

C. Tooling

(1) None.

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 (M-DLPS,

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

A. Procedure to re-identify the bogie beam with a new part number, that by records have had

the correct protective treatments applied and checked at new manufacture (refer to the

Aircraft Maintenance Manual, CMM 32-11-74 or CMM 32-12-05)

(1) Refer to Appendix A. Check the table in Appendix A for the serial numbers of the bogie

beams which, by records, have had the correct protective treatments applied and

checked at new manufacture. If a bogie beam serial number is shown in the table in

Appendix A:

NOTE: If a bogie beam serial number is not shown in the table in Appendix A:

refer to Para 3.B.

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

Manual.

(b) Remove the protective treatments from the bogie beam adjacent to the part

number: refer to PCS-2700.

(c) Identify the bogie beam (3-180) by change of part number as follows: refer to

PCS-6000-05.

New Part Number Old Part Number

201272307 201272304

(d) Repair the protective treatment on top of the new part number: refer to PCS-2141

and PCS-2500.

(e) Identify the bogie beam subassembly (3-20) by change of part number as follows:

refer to PCS-6000-07.

New Part Number Old Part Number

201272245 201272235

201272307 1 ....Bogie Beam 201272304 (B) 01 -

NOTE: For IC code also refer to Airbus Service Bulletins A330-32-3237 and

A340-32-4279.

New

Part No.

Qty. 

Per 

Unit

Keyword Old

Part No.

Instructions/

Disposition

IC New Part 

Price 

($US)

Jul 10/2012 (Revision 1)
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Messier-Dowty Ltd

(f) Identify the bogie beam and axle subassembly (2-170, CMM 32-11-74) or (2-180,

CMM 32-12-05) by change of part number as follows: refer to PCS-6000-07.

New Part Number Old Part Number

201272248 201272236

(2) Continue at Para 3.C. Identification.

B. Procedure at overhaul or the next shop visit (refer to CMM 32-11-74, CMM 32-12-05 and

Figures 1 to 3 of this Service Bulletin). At the applicable step:

NOTE: Make sure Service Bulletin A33/34-32-278 is completed before you continue

with this Service Bulletin.

(1) Check that you have the correct thickness of cadmium plate. Measure at each point

(points 1 to 10), with a permascope, five times and take the average measurement:

refer to Figures 1 to 3 for the measuring points.

(a) The thickness of cadmium plate to be between 0,010 and 0,020 mm (0.0004 and

0.0008 in).

NOTE: If the measurement is below that given above the bogie beam must

be cadmium plated again: refer to REPAIR and PCS-2100.

(2) Identify the bogie beam (3-180) by change of part number as follows: refer to

PCS-6000-05.

New Part Number Old Part Number

201272307 201272304

or

201272306 201272302

or

201272305 201272300

or

201485301 201485300

(3) Repair the protective treatment on top of the new part number: refer to PCS-2141 or

PCS-2100.

(4) Primer paint the bogie beam 201272307, 201272306, 201272305 or 201485301: refer

to PCS-2500.

(5) Check that you have the correct thickness of primer paint. Measure at each point

(points 1 to 10), with a permascope, five times and take the average measurement:

refer to Figures 1 to 3 for the measuring points.

(a) The thickness of primer paint in the bore of the bogie beam (points 1 to 8) to be

0,040 to 0,050 mm (0.0016 to 0.0020 in) dry film thickness.

Jul 10/2012 (Revision 1)
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Messier-Dowty Ltd

(b) The thickness of primer paint on the outside of the bogie beam (points 9 and 10)

to be 0,020 to 0,025 mm (0.0008 to 0.0010 in) dry film thickness.

NOTE: The thickness measurement of the primer paint must not include

the cadmium plate thickness. The average thickness at Para

3.B.(1)(a) at points 1 to 10 must be subtracted from the thickness at

Para 3.B.(5)(a) and (b).

NOTE: If the measurement is below that given in Para 3.B.(5)(a) and (b) the

bogie beam must be primer painted again: refer to REPAIR and

PCS-2500.

(6) Install the bushes in the bogie beam 201272307, 201272306, 201272305 or

201485301: refer to ASSEMBLY.

(7) Top coat paint the bogie beam subassembly (3-20): refer to REPAIR, PCS-2500 and

PCS-7204.

(8) Check that you have the correct thickness of top coat paint. Measure at each point

(points 1 to 10), with a permascope, five times and take the average measurement:

refer to Figures 1 to 3 for the measuring points.

(a) The thickness of top coat paint to be 0,040 to 0,050 mm (0.0016 to 0.0020 in) dry

film thickness

NOTE: The thickness measurement of the top coat paint must not include

the cadmium plate or primer paint thicknesses. The average

thickness at Para 3.B.(1)(a) at points 1 to 10 plus the average

thicknesses taken at Para 3.B.(5)(a) and (b) at points 1 to 10 must

be subtracted from the thickness at Para 3.B.(8)(a). 

NOTE: If the measurement is below that given in Para 3.B.(8)(a), the bogie

beam subassembly must be painted again: refer to REPAIR and

PCS-2500.

(9) Calculate the total thickness of protective treatments applied (ie: cadmium plate plus

primer paint plus top coat paint). Measure the depth of protective treatments with a

permascope to make sure the total depth is correct.

(10) Apply Ardrox AV100D to the bore of the bogie beam subassembly (3-20): refer to

PCS-2800.

(11) Identify the bogie beam subassembly (3-20) by change of part number as follows: refer

to PCS-6000-07.

New Part Number Old Part Number

201272245 201272235

or

201272244 201272226

or

201272244 201272228

or

201272243 201272230

or

201485207 201485205

Jul 10/2012 (Revision 1)
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SERVICE BULLETIN

Messier-Dowty Ltd

(12) Install the axles in the bogie beam subassembly 201272245, 201272244, 201272243

or 201485207: refer to ASSEMBLY.

(13) Identify the bogie beam and axle subassembly (2-170, CMM 32-11-74) or (2-180, CMM

32-12-05) by change of part number as follows: refer to PCS-6000-07.

New Part Number Old Part Number

201272248 201272236

or

201272247 201272238

or

New Part Number Old Part Number

201272247 201272239

or

201272246 201272240

or

201485208 201485206

(14) Continue with the assembly of the bogie assembly: refer to ASSEMBLY in the

applicable CMM.

C. Identification

NOTE: When it is necessary to replace the identification nameplate identify the

replacement nameplate with all the applicable data.

(1) After you have done this Service Bulletin:

- cancel the related strike number 25 on the bogie and dressings nameplate, refer to

M-DLPS1006-5 and cancel like this 

- write the Service Bulletin number A33/34-32-284 in the applicable aircraft and

landing gear records.

25

Jul 10/2012 (Revision 1)
Service Bulletin No. A33/34-32-284

Page 9

SERVICE BULLETIN

Messier-Dowty Ltd

Bogie Beam - Measurement Points

Figure 1

A340A5258-1

A

A

80,00 to 90,00mm

(3.150 to 3.543in)

75,00 to 85,00mm

(2.953 to 3.346in)

80,00 to 90,00mm

(3.150 to 3.543in)

75,00 to 85,00mm

(2.953 to 3.346in)

POINT 9

POINT 10

POINTS 9 AND 10

ARE EXTERNAL

MEASUREMENT 

POINTS

B

100,00mm

(3.937in)

POINT 2

POINT 4

C

POINT 3

POINT 1

POINT 6 POINT 5

DIM. A

(SEE FIGURE 3)

100,00mm

(3.937in)

B

POINT 8 POINT 7

SECTION A-A

POINTS 1 TO 8 

ARE INTERNAL 

MEASUREMENT 

POINTS

SEE SHEET

2

POINTS 1 TO 8 

ARE INTERNAL 

MEASUREMENT 

POINTS

DIM. A

(SEE FIGURE 3)

Jul 10/2012 (Revision 1)
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SERVICE BULLETIN

Messier-Dowty Ltd

Bogie Beam - Measurement Points

Figure 2

A340A5240-1

SPOT FACES

PROBE DIAMETER

8,00 to 12,00mm

(0.315 to 0.472in)

TYPICAL ALL POINTS

SECTION B-B

W

POINT 1

POINT 2 DIAMETRICALLY OPPOSITE

POINT 3

POINT 4 DIAMETRICALLY OPPOSITE

POINT 5

POINT 6 DIAMETRICALLY OPPOSITE

POINT 7

POINT 8 DIAMETRICALLY OPPOSITE

V SPOTFACES Y

DETAIL C

11,00mm

(0.433in)

POINTS 

3 TO 6

RADIUS

BLEND

TANGENT

POINT

SEE SHEET 1

TYPICAL POINTS

3 TO 6 INCLUSIVE

SEE SHEET 1

10,00mm

(0.390in) DIA X V-W

10,00mm

(0.390in) DIA Z V-W

10,00mm

(0.390in) DIA Z V-W

10,00mm

(0.390in) DIA Y V-W

X

Z

POINTS 1 TO 8 ARE INTERNAL 

MEASUREMENT POINTS

Jul 10/2012 (Revision 1)
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SERVICE BULLETIN

Messier-Dowty Ltd

Bogie Beam - Measurement Points 

(Part Numbers Pre-Service Bulletin A33/34-32-284)

Figure 3

Bogie Beam

Part No.

Bogie Beam Subassembly 

Part No.

Dimension A

(see Figure 1)

201272300 201272230 162,00 mm

(6.379 in)

201272302

201272226

171,00 mm

(6.732 in)

201272228

201485300 201485205

201272304 201272235

Jul 10/2012 (Revision 1)
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Messier-Dowty Ltd

4. Messier-Dowty and Messier Services Contacts

A. Refer to the Messier-Dowty website (safranmbd.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-Bugatti-Dowty 

Landing Gear & Systems 

Integration Division

Inovel Parc Sud

BP10

78140 Velizy - Villacoublay

FRANCE

Tel: +33 146 29 18 00

Fax: +33 146 29 8770

Technical Assistance and Spares Support Centers (TASSC)

For AOG (commercial and technical): aogtassc@safranmbd.com

For Europe - Africa - Middle East customers: eametassc@safranmbd.com

Tel: +33 1 5521 2590

For Americas customers: americatassc@safranmbd.com

Tel: +1 404 305 2626

For Asia-Pacific customers: asiatassc@safranmbd.com

Tel: +65 6245 5688

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

Jul 10/2012 (Revision 1)
Appendix A

Service Bulletin No. A33/34-32-284

Page 1 of 2

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

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

SERVICE BULLETIN

Messier-Dowty Ltd

 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)

This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property rights are

granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the

express written consent of Messier-Bugatti-Dowty.

Safran and Messier-Bugatti names are marks owned respectively by Safran and Messier-Bugatti-Dowty companies. The mark Dowty is

used under licence.

APPENDIX A

LANDING GEAR - MAIN LANDING GEAR - BOGIE AND DRESSINGS - BOGIE BEAM -

SERIAL NUMBER DATA

1. The tables that follow shows the serial numbers of the bogie beams 201272304 that have had the

correct protective treatments applied and checked at new manufacture. 

Bogie Beam Serial No. Bogie Beam Serial No. Bogie Beam Serial No. Bogie Beam Serial No. 

07MDG3420 07MDG9149 07MDG9417

07MDG10902 07MDG10903 07MDG15409 07MDG15410

07MDG15411 07MDG15412 07MDG15413 07MDG15414

07MDG16090 07MDG16091 07MDG16092 07MDG16093

07MDG16094 07MDG16095 07MDG18804 07MDG18805

07MDG18806 07MDG18807 07MDG18808 07MDG18809

08MDG1050 08MDG1052 08MDG1053

08MDG3104 08MDG3105 08MDG3976 08MDG3977

08MDG3979 08MDG3980 08MDG5506

08MDG5507 08MDG5509 08MDG5510 08MDG5940

08MDG5941 08MDG5942 08MDG5943 08MDG5944

08MDG5945 08MDG11550 08MDG11551

08MDG11553 08MDG11554 08MDG11555 08MDG11556

08MDG11558 08MDG11718

08MDG11719 08MDG11720 08MDG11721 08MDG11722

08MDG11723 08MDG11724

08MDG11880 08MDG11887 08MDG12345

08MDG12347 - - -

08MDG5511 08MDG12348 08MDG12343 SER12335/05

08MDG5508 - - -

Jul 10/2012 (Revision 1)
INTENTIONALLY BLANK

Appendix A

Service Bulletin No. A33/34-32-284

Page 2

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

Messier-Dowty Ltd

 ©MESSIER-BUGATTI-DOWTY 2012 (AND SUBSEQUENT REVISION PAGE DATES)

This document and all information contained herein is the sole property of Messier-Bugatti-Dowty. No intellectual property rights are

granted by the delivery of this document or the disclosure of its content. This document shall not be reproduced to a third party without the

express written consent of Messier-Bugatti-Dowty.

Safran and Messier-Bugatti names are marks owned respectively by Safran and Messier-Bugatti-Dowty companies. The mark Dowty is

used under licence.

AIRBUS A330/A340 MAIN LANDING GEAR

SERVICE BULLETIN A33/34-32-284

TRANSMITTAL LETTER FOR REVISION 1

DATE JUL 10/2012

1. REASON

A. To update Manpower hours.

B. To update serial numbers in Appendix A.

2. ACTION

A. Remove and destroy existing pages 1 to 10 and substitute revised pages 1 to 10 dated

Jul 10/2012.

B. Appendix A. Remove and destroy existing pages 1 to 2 and substitute revised

pages 1 to 2 dated Jul 10/2012.

3. PREVIOUS REVISION/ISSUE DETAILS

Revision Status Date

A. Initial Issue May 11/2010
SERVICE BULLETIN

Messier-Dowty Ltd