Messier-Dowty Ltd

Service Bulletin No. 146-32-157

Page 1 of 6

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 SHOCK ABSORBER

LOWER ATTACHMENT PIN

1. Planning Information

A. Effectivity

Aircraft affected: BAe 146 All Series

AVRO 146 RJ All Series

Unit affected: Main Landing Gear

Part/Type Nos.: 200671001, 200671002, 200671003, 200671004

200877001, 200877002

201107001, 201107002, 201107003, 201107004

201298001, 201298002

201423001, 201423002

B. Concurrent Requirements

(1) None.

C. Reason

(1) Instances of corrosion to the outer diameter of the lower attachment pin for the shock

absorber have occurred in service.

(2) Excessive corrosion could lead to pin fracture.

D. Description

(1) This Service Bulletin tells operators to perform a visual inspection of the pin that

attaches the shock absorber to the wheel lever and axle sub-assembly.

E. Compliance 

(1) Refer to BAE SYSTEMS Service Bulletin 32-176.

F. Approval

(1) The technical content of this Service Bulletin has been approved on behalf of BAE

SYSTEMS (Ref. DO.21014) under the authority of EASA Approval No.

EASA.21J.047.

G. Manpower

(1) Messier-Dowty Limited estimate that it will take two manhours per main landing gear

to do this Service Bulletin.

H. Weight and Balance

(1) None.

Feb 12/2009
Messier-Dowty Ltd

Service Bulletin No. 146-32-157

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SERVICE BULLETIN

I. References

(1) Aircraft Maintenance Manual.

(2) Messier-Dowty Limited Component Maintenance Manual 32-10-34.

(3) Messier-Dowty Limited Component Maintenance Manual 32-10-64.

(4) Messier-Dowty Limited Component Maintenance Manual 32-10-72.

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

(6) BAE SYSTEMS Service Bulletin 32-176.

J. Other Publications Affected

(1) None.

2. Material Information

A. Material

(1) None.

B. Material Necessary For Each Unit

(1) None.

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)

are in the Standard Practices Manual.

A. Procedure (Refer to Figure 1)

(1) Jack the aircraft and gain access to the shock absorber lower attachment pin

200877682, 201107608 or 201107615: refer to the Aircraft Maintenance Manual.

(2) Remove the pin from the main landing gear: refer to the Aircraft Maintenance Manual.

(3) Examine the outer diameter of the pin for signs of corrosion or damage to the

chromium plating.

(4) If the chromium plating on the outer diameter of the pin shows any sign of corrosion

the pin must be rejected.

(5) If the chromium plating on the outer diameter of the pin is cracked or the base

material is exposed the pin must be rejected.

(6) If the chromium plating on the outer diameter of the pin shows signs of smooth wear

and is within the wear limits specified in the Component Maintenance Manual, the pin

can be re-installed.

(7) If the pin is rejected, install a new one: refer to the Aircraft Maintenance Manual.

Return rejected pins to Messier-Dowty Limited for the attention of the EQA Laboratory

at the address shown at the top of page one.

Feb 12/2009
Messier-Dowty Ltd

Service Bulletin No.146-32-157

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SERVICE BULLETIN

(8) Send Messier-Dowty Limited the following details without delay, use the form

provided in Appendix A:

- the findings of the inspection

- main landing gear part number

- main landing gear serial number

- pin part number

- pin serial number

- pin CSN

- landings since pin installation

- landings since pin overhaul (if applicable).

B. Identification

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

replacement nameplate with all the applicable data: refer to PCS-6000

Method 05.

(1) Mark the Service Bulletin number 146-32-157 on the main landing gear nameplate:

refer to PCS-6000 Method 05.

(2) Write the Service Bulletin number 146-32-157 in the applicable aircraft and landing

gear records.

Feb 12/2009
Messier-Dowty Ltd

Service Bulletin No. 146-32-157

Page 4

SERVICE BULLETIN

Main Landing Gear

Figure 1

PIN

(SHOCK ABSORBER

LOWER ATTACHMENT)

200877682

201107608

201107615

PART SECTION VIEW AT A B146A1898-1

A

Feb 12/2009
Messier-Dowty Ltd

Service Bulletin No.146-32-157

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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)

For AOG (commercial and technical): aogtassc@messier-dowty.com

For Europe customers: eametassc@messier-dowty.com

Tel: +33 1 5521 2590

For Americas customers: americatassc@messier-dowty.com

Tel: +1 404 305 2626

For Asia-Pacific customers: asiatassc@messier-dowty.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

Feb 12/2009
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Service Bulletin No. 146-32-157

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SERVICE BULLETIN
Messier-Dowty Ltd

Service Bulletin No. 146-32-157

Page 1 of 2

CAGE: K0654

Cheltenham Road, Gloucester, GL2 9QH, England

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

SERVICE BULLETIN

APPENDIX A

INSPECTION OF BAE 146/AVRO RJ MAIN LANDING GEAR SHOCK ABSORBER

LOWER ATTACHMENT PIN

Return this form to the address shown at the top of the page (or by fax to +44 (0) 1452 711245),

marked for the attention of the Commuter IPT Technical Manager.

YOU MAY PHOTOCOPY THIS FORM

OPERATOR NAME:

INSPECTION FINDINGS:

MAIN LANDING GEAR PART NO.:

MAIN LANDING GEAR SERIAL NO.:

PIN PART NO.:

PIN SERIAL No.:

PIN CSN:

LANDINGS SINCE PIN 

INSTALLATION:

LANDINGS SINCE PIN OVERHAUL (if 

applicable):

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Messier-Dowty Ltd

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Service Bulletin No. 146-32-157

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SERVICE BULLETIN