Service Bulletin No. A33/34-32-278 Page 1 of 8 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 2011 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts 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 bySafran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. LANDING GEAR - MAIN LANDING GEAR - INSPECTION OF THE BOGIE BEAM INTERNAL DIAMETER FOR CORROSION AT OVERHAUL
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.: 201252 Series (Main Landing Gear Complete) 201490 Series (Main Landing Gear Complete) 10-210101 Series (Main Landing Gear Complete LH) 10-210201 Series (Main Landing Gear Complete RH) which includes 201274 Series (Bogie and Dressings) 201486 Series (Bogie and Dressings) 10-211501 Series (Bogie and Dressings) which includes 201272 Series (Bogie Assembly) 201485 Series (Bogie Assembly) 10-211701 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 t he bogie beam adjacent to the bogie beam pivot pin may have contributed to the fracture. (3) To perform specific inspections of the bogie beam bore condition, before removal of the protective finishes. 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) A visual examination of the inte rnal diameter for corrosion or damage to protective treatments of the bogie beam.

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# SERVICE BULLETIN Messier-Dowty Ltd

(b) Measurement of the paint thickness on the internal bore. (2) Messier-Dowty Limited tells you that you must complete the proforma in Appendix B to report results of the inspection and return it to the address shown in Appendix B. (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 the base material. E. Compliance (1) Messier-Dowty recommend that you do this Service Bulletin at next overhaul. (2) It is expected that the contents of this Service Bulletin will be made MANDATORY by EASA. F. Approval (1) The technical content of this Service Bulletin has been approved under the authority of the EASA Design Organisation A pproval No. EASA.21J.031. G. Manpower (1) Messier-Dowty Limited make an estimate thatit will take approximately an additional 4 man-hours to do this Service Bulletin at overhaul. 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 32-11-70. (2) Messier-Dowty Limited Component Maintenance Manual 32-11-74. (3) Messier-Dowty Limited Component Maintenance Manual 32-11-94. (4) Messier-Dowty Limited Component Maintenance Manual 32-11-95. (5) Messier-Dowty Limited Component Maintenance Manual 32-12-01. (6) Messier-Dowty Limited Component Maintenance Manual 32-12-04. (7) Messier-Dowty Limited Component Maintenance Manual 32-12-05. (8) Messier-Dowty Limited Component Maintenance Manual 32-12-60. (9) Messier-Dowty Limited Component Maintenance Manual 32-12-63. (10) Messier-Dowty Limited Component Maintenance Manual 32-12-64. (11) Messier-Dowty Standard Practices Manual 20-00-10. (12) Aircraft Maintenance Manual.

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# SERVICE BULLETIN Messier-Dowty Ltd

J. Other Publications Affected (1) None.
2. Material Information A. Material - Price and Availability (1) None. 3. Accomplishment Instructions The figure/item numbers in parentheses in the textagree 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 for a visual inspection of the internal diameter of the bogie beam for corrosion or damage. (1) After disassembly of the bogie beam to detail level and before paint strip, clean all the internal surfaces of the bogie beam (3-180, CMM 32-12-05, CMM 32-11-74 or 3-190 CMM 32-12-64). 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. (2) Fully inspect the internal diameter of the bogie beam (3-180, CMM 32-12-05, CMM 32-11-74 or 3-190 CMM 32-12-64) for corrosion or damage to the protective treatments. Measure and record the depth of the protective treatments (A-H) using a permascope: refer to CHECK in the applicable CMM and Figures 3 and 4 of this Service Bulletin. NOTE: Record the condition of the surface protection: record any flaking, discolouration, blistering and lack of coverage. If there is no corrosion or damage to the protective treatments record this on the proforma in Appendix B. Record the depth (A-H) of protective treatment on the proforma. Return a completed copy to the address shown in Appendix B. (3) If you find corrosion: refer to Appendix A of this Service Bulletin for details of repair limits. NOTE: If you find corrosion or damage to the protective treatments record this on the proforma in Appendix B. (4) When you have completed the proforma in Appendix B, continue with the overhaul: refer to the applicable Component Maintenance Manual. B. Identification (1) After you have done this Service Bulletin: - write the Service Bulletin number A33/34-32-278 in the applicable aircraft and main landing gear records.

Aug 24/2011 (Revision 1)Service Bulletin No. A33/34-32-278 Page 4 

# SERVICE BULLETIN Messier-Dowty Ltd

Main Landing Gear Complete - Area of Inspection Figure 1 AREA OF INSPECTION

A340A4408-1

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# SERVICE BULLETIN Messier-Dowty Ltd

Bogie Beam - Area of Inspection Figure 2 A340A4851-1 BOGIE ASSEMBLY 

# Y

Y (SEE FIGURE 4) 

## Z (SEE FIGURE 3)



## Z

Aug 24/2011 (Revision 1)Service Bulletin No. A33/34-32-278 Page 6 

# SERVICE BULLETIN Messier-Dowty Ltd

Bogie Beam - Area of Inspection Figure 3 SECTION 

## Z-Z

A340A4410-1 AREA OF INTERNAL DIAMETER INSPECTION

Aug 24/2011 (Revision 1)Service Bulletin No. A33/34-32-278 Page 7 

# SERVICE BULLETIN Messier-Dowty Ltd

Bogie Beam - Area of Inspection Figure 4 SECTION 

## Y-Y AREA OF INTERNAL DIAMETER INSPECTION (360 DEGREES)

A340A4411-1

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# SERVICE BULLETIN 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 Zone Aeronautique L. Breguet BP10 78140 Velizy - Villacoublay FRANCE Tel : +33 146 29 18 00 Fax : +33 146 29 8770 Technical Assistance and Spar es 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

Aug 24/2011 (Revision 1)APPENDIX A Service Bulletin No. A33/34-32-278 Page 1 of 4 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 2011 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts 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 bySafran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. APPENDIX A METHOD OF REPAIR TO THE BO GIE BEAM PROTECTIVE TREATMENTS
1. Procedure A. For the 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 or CMM 32-12-64 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) If the paint is damaged. Record damage before locally masking the surrounding area and stripping the paint: refer to PCS-2700. OR (2) Carefully remove damaged paint using Scotchbrite or fine emery paper. (a) Measure area of paint removed. NOTE: Measure and record the location of the reworked area in Appendix B, Figure 2. Return a completed copy of Appendix B to the address shown in Appendix B. (3) Visually check the cadmium plating. (a) If the cadmium plating is damaged (grey in colour) or the plating depth is not satisfactory but the base metal is not corroded.
1 Carefully remove the cadmium plating using Scotchbrite or fine emery paper. 2 Measure the area of cadmium plating removed. NOTE: Measure and record the location of the reworked area in Appendix B, Figure 2. Return a completed copy of Appendix B to the address shown in Appendix B. (4) If the base material has corrosion or damage. (a) Measure and record the maximum depth of corrosion. NOTE: Record the location, area and depth of corrosion on the proforma: refer to Appendix B. (b) Locally repair the corroded or damaged area: refer to the applicable Component Maintenance Manual.

Aug 24/2011 (Revision 1)APPENDIX A Service Bulletin No. A33/34-32-278 Page 2 

# SERVICE BULLETIN Messier-Dowty Ltd

WARNING: BLEND RADIUS MUST BE APPLIED ALL AROUND THE REWORKED AREA. MAKE SURE ALL BLENDS ARE SMOOTH. (c) 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 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. (d) Measure the depth and area of material removed. NOTE: Measure and record the location, area and depth of the reworked area in Appendix B, Figure 2. Return a completed copy of Appendix B to the address shown in Appendix B. (e) Inspect the repaired area for corrosion or cracking: refer to the applicable Component Maintenance Manual. (f) If the depth of material removed is more than 0,038 mm (0.0015 in) but less than 0,40 mm (0.015 in) shot peen the repaired area: refer to PCS-2300 and REPAIR in the applicable Component Maintenance Manual. (5) Complete the overhaul of the bogie beam: refer to the applicable Component Maintenance Manual.

Aug 24/2011 (Revision 1)APPENDIX A Service Bulletin No. A33/34-32-278 Page 3 

# SERVICE BULLETIN Messier-Dowty Ltd

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
A340A4918-1 0,30mm (0.012in) MAXIMUM 100,00mm (3.937in) MINIMUM IN AREA B or 10,00mm (0.394in) MINIMUM IN AREA A BLEND RADIUS WITHIN THE POSITION SHOWN (SEE VIEW ABOVE) AXLE

238,85mm (9.404in) DIAMETER AREA B REMOVE DAMAGED OR 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 OR CORRODED MATERIAL. USE 10mm (0.394in) MINIMUM BLEND RADIUS WITHIN THIS LENGTH

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# SERVICE BULLETIN Messier-Dowty Ltd

Bogie Beam - Area of Repair Figure 2 100,00mm (3.937in) RADIUS

20,00mm (0.787in)

1 5 D E

G

R

E

E

S 1 5 D E

G

R

E

E

S

IF REQUIRED 0,40mm (0.015in) MAXIMUM REMOVAL MAY BE USED AT ANY POSITI ON 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

A330A4919-1 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 OR CORRODED MATERIAL. USE 100mm (3.937in) MINIMUM BLEND RADIUS

WITHIN THIS LENGTH AREA A REMOVE DAMAGED OR CORRODED MATERIAL. USE 10mm (0.394in) MINIMUM BLEND RADIUS WITHIN THIS LENGTH

MAKE EDGES SMOOTH 10,00mm (0.394in) MINIMUM BLEND RADIUS

Aug 24/2011 (Revision 1)APPENDIX B Service Bulletin No. A33/34-32-278 Page 1 of 4 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 2011 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts 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 bySafran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. APPENDIX B AIRBUS A330/340 - MAIN LANDING GEAR - BOGIE AND DRESSINGS PROFORMA FOR REPORTING RESULTS OF IN SPECTION SERVICE BULLETIN A33/34-32-278 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 B 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.

Aug 24/2011 (Revision 1)APPENDIX B Service Bulletin No. A33/34-32-278 Page 2 

# SERVICE BULLETIN Messier-Dowty Ltd

Bogie Beam - Developed View of Bogie Beam Bore - Area of Repair Figure 1 A340A4916-1 PART SECTION 

## Z-Z DAMAGED/REPAIR AREA

VIEW ON ARROW

## A

A XXXmm (XXXin) XXXmm (XXXin) XXXmm (XXXin)

XXXmm (XXXin)

XXXmm (XXXin) XXXmm (XXXin)

XXXmm (XXXin) MAXIMUM DEPTH OF BLEND XXXmm (XXXin) WIDTH XXX DEGREES 

## Z Z

BOGIE PIVOT PIN CENTERLINE AXLE

AXLE FWD

AFT

DEVELOPED VIEW OF BOGIE BEAM BORE KEY BASE MATERIAL COROSION

CADMIUM PLATE

PAINT THIS IS AN EXAMPLE OF HOW TO RECORD AREA DIMENSIONS AND LOCATION OF DAMAGE TO PROTECTIVE TREATMENTS AND BASE MATERIAL AND AREA OF REPAIR

DAMAGE FOUND

NO DAMAGE FOUND RECORD RESULTS ON PAGE 3 OF APPENDIX B. RETURN PAGES 1 AND 3 OF APPENDIX B

RETURN PAGE 1, PAGE 3 AND PAGE 4 OF APPENDIX B 0/360 DEGREES

180 DEGREES 270 DEGREES 90 DEGREES

0 DEGREES 360 DEGREES 180 DEGREES 270 DEGREES 90 DEGREES BASE MATERIAL REPAIR

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# SERVICE BULLETIN Messier-Dowty Ltd

USE THE ILLUSTRATION BELOW TO MARK THE LOCATION OF REPAIR

Bogie Beam - Developed View of Bogie Beam Bore - Area of Repair Figure 2 A340A4917-1 PART SECTION 

## Z-Z

(REFER TO FIGURE 1) REWORK AREA
VIEW ON ARROW

## A

A BOGIE PIVOT PIN CENTERLINE

DEVELOPED VIEW OF BOGIE BEAM BORE MEASURE AREA OF DAMAGE TO PROTECTIVE TREATMENT AND BASE MATERIAL AND AREA OF REPAIR AND 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

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# SERVICE BULLETIN Messier-Dowty Ltd

Bogie Beam - Developed View of Bogie Beam Bore - Protective Treatment Depth Location Figure 3 A340A4842-1 

## A BOGIE PIVOT PIN CENTERLINE

DEVELOPED VIEW OF BOGIE BEAM BORE 

## MEASURE THE PROTECTIVE TREATMENT DEPTH AND RECORD DIMENSIONS IN THE TABLE AT LOCATIONS SHOWN FWD

0 DEGREES 360 DEGREES 180 DEGREES 270 DEGREES 90 DEGREES VIEW ON ARROW

## A 0/360 DEGREES

270 DEGREES 90 DEGREES

180 DEGREES 100mm (3.937in) D

C

A B

E

F

H G 100mm (3.937in)

100mm (3.937in)

100mm (3.937in)

100mm (3.937in)

100mm (3.937in)

100mm (3.937in)

100mm (3.937in)

D C A
B

E

F

H G 1 23 4 5

MEASUREMENTS A TO H MUST BE DONE IN AN AREA WHERE THE PAINT IS NOT DAMAGED. IF THIS IS NOT POSSIBLE MEASURE AT THE NEAREST POINT WHERE THE PAINT IS NOT DAMAGED. FIVE MEASUREMENTS ARE NECESSARY AT EACH LOCATION.

Aug 24/2011 (Revision 1)Page 1 of 1 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 2011 (AND SU BSEQUENT REVISION PAGE DATES) This document and all information contained herein is the sole pr operty of Messier-Bugatti-Dowty. No intellectual property righ ts 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 bySafran and Messier-Bugatti-Dowty companies. The mark Dowty is used under licence. AIRBUS A330/A340 MAIN LANDING GEAR SERVICE BULLETIN A33/34-32-278 TRANSMITTAL LETTER FOR REVISION 1 DATE AUG 24/2011
1. REASON A. To add A330/340 10-210101 and 10-210201 Enhanced Main Landing Gear references.
2. ACTION A. Remove and destroy existing pages 1 to 8 and substitute revised pages 1 to 8 dated Aug 24/2011. B. Appendix A. Remove and destroy existing pages 1 to 4 and substitute the revised pages 1 to 4 dated Aug 24/2011. C. Appendix B. Remove and destroy existing pages 1 to 4 and substitute the revised pages 1 to 4 dated Aug 24/2011.
3. PREVIOUS REVISION/ISSUE DETAILS Revision Status Date A. Initial Issue Feb 17/2010