BAE SYSTEMS (Operati ons) Limited, Prestwick International Airport, Ayrshire, 

KA9 2RW, Scotland. 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

TITLE : LANDING GEAR - INTRODUC TION OF COMPLIANCE PERIODS IN ADVANCE 

OF A 16,000 CYCLE SAFE LIFE FOR NOSE LANDING GEAR MAIN 

FITTINGS. 

1.Planning information 

A.Effectivity 

(1) Aircraft 

Aircraft affected by this inspection are defined below :-

BAe 146 Series 100 and AVRO 146-RJ70 with the following NLG 

Main Fi tting Part Nos. 

Part No. 

200876293 

200876340 

200876294 

200876341 

200876295 

200876342 

200876296 

200876343 

201012203 

200876343 

201012206 

200876341 

201012207 

200876340 

201012209 

200876342 

200876297 

Date: 12-APR-2012 

Revision: Initial issue 

Table 1. 

Description 

Main fitting 

Main fitting 

Main fi t ting 

Main fitting 

Main fitting 

Main fi tt i ng 

Main fitti ng 

Main fitting 

Main fitting 

Main fi tting 

Main fitting 

Main fitting 

Main fitting 

Main fitting 

Ma in fitting 

Ma in fitting 

Main fitting 

Printed in England 

S/A 

S/A 

S/A 

S/A 

S/A 

S/A 

S/A 

S/A 

S/A 

ISB.32-186 

Page1of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAF T 

Part No. 

200876344 

200876299 

200876345 

201 912201 

200876344 

201012204 

200876345 

2011 38206 

201138304 

201138 207 

201138305 

201138209 

201138307 

201138210 

201138308 

201138212 

20113831 0 

201138213 

201138311 

201138215 

201138313 

201138217 

201138315 

201138219 

201138317 

201138220 

201138318 

Date : 12-APR-2012 

Revision: Initial issue 

Description 

Main fitting 

Main fitting S/A 

Main fi tting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Ma in fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Printed in England 

ISB.32-186 

Page2of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

Part No . 

201138222 

201138320 

201138223 

201138321 

201138225 

201138323 

BAe 146 Series 200 

Main Fitting Part 

Part No. 

200876293 

200876340 

200876294 

200876341 

200876295 

200876342 

200876296 

200876343 

201012203 

200876343 

201012206 

200876341 

201012207 

200876340 

201012209 

200876342 

200876297 

Date: 12-APR-2012 

Rev ision: Initial issue 

Description 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitt ing 

Main fitt ing S/A 

Main fit t ing 

and AVRO 146-RJ85 with 

Nos. 

Table 2. 

Description 

Main fit t ing S/A 

Main fitting 

Main fitting S/A 

Main fitti ng 

Main fitting S/A 

Main fitting 

Main fi tting S/A 

Ma in fitting 

Main fitting S/A 

Main fitting 

Main fitti ng S/A 

Main fitting 

Main fi tt ing S/A 

Ma in fitting 

Main fitting S/A 

Main fi tt ing 

Main fi tt ing S/A 

Printed in England 

the following NLG 

ISB . 32-186 

Page3of14 
BAE SYSTEMS 

INSPECTION SERVICE BUL LETIN 

BAe 146 SERIES / AVRO 146-RJ SER IES AIRCRA FT 

Part No. 

200876344 

200876299 

200876345 

201012201 

200876344 

201012204 

200876345 

201138206 

201138304 

201138207 

201138305 

201138209 

201138307 

201138210 

201138308 

201138212 

201138310 

201138213 

201138311 

201138215 

201138313 

201138217 

2011 38315 

201138219 

201138317 

201138220 

201138318 

Date : 12- APR-2012 

Revision: Initial issue 

Desc ri ption 

Main fitting 

~a in fi tti ng S/A 

!lain fitting 

Main fitting S/A 

Main fitting 

Main fi tt i ng S/A 

Main fitting 

Main fitting S/A 

"a in fitting 

Main fitt i ng S/A 

Main fitting 

Main fitting S/A 

Ma in fitting 

Main fitting SIA 

Main fitting 

Main fitting SIA 

Main fitting 

Main fitting SIA 

Main fitt i ng 

Main fitting S/A 

Main fitting 

"a in fitting S/A 

Main fi t ti ng 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitt i ng 

Printed in England 

ISB.32-186 

Page4of14 
BAE SYSTEMS 

INSPECTION SERVIC E BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAF T 

Part No. 

201138222 

2011383 20 

201138223 

2011 38321 

201138225 

201138323 

BAe 146 Series 300 

Main Fitting Par t 

Part No . 

200876297 

200876344 

2008 76299 

200876345 

201012201 

200876344 

201012204 

200876345 

201138206 

201138304 

201138207 

201138305 

201138210 

201138308 

201138217 

201138315 

201138220 

Date: 12-APR-2012 

Revision : Ini tial issue 

Description 

Main fi tti ng S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

and AVRO 146-RJ100 with 

Nos. 

Table 3. 

Description 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fi tting S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitt ing S/A 

Main fitting 

Main fitting S/A 

Main fitting 

Main fitting S/A 

Main fitti ng 

Main fitting S/A 

Main fitting 

Main fi tting S/A 

Printed in Eng land 

the following NLG 

ISB . 32-186 

Page 5 of 14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

Part No. Description 

201138318 Ma in fi tt i ng 

B.Reason 

In-service cracking of The Nose Landing Gear (NLG) Main Fitting 

has required that a revised safe life of 16,000 landings is 

introduced for the NLG Main Fitting Part Nos . listed in para.1 . A 

Table 1, Table 2 and Table 3 . The revised safe life will be 

introduced to the Aircraft Maintenance Manual at an appropriate 

time. This Inspection Service Bulletin provides grace periods for 

the replacement of NLG Main Fittings that have already exceeded 

16,000 landings . 

C.D escription 

The aircraft records are checked to determine the compliance for 

the replacement of the NLG Main Fitting and the NLG Main Fitting 

is replaced with a new or serviceable item within the identified 

grace period. 

Work comprises:-

- Check the aircraft records and any log cards of spare NLG to 

determine landings achieved by NLG Main Fitting. 

- Determine compliance for replacement of NLG Main Fitting. 

- Replace NLG Main Fitting within specified compliance period. 

D.Compliance 

The technical content of this Inspection Service Bulletin is the 

subject of EASA AIRWORTHINESS DIRECTIVE consultation. 

The 16,000 Flight Cycle life is applicable to all BAe 146 and AVRO 

146-RJ NLG Main Fittings. 

The new life will come into effect as follows: 

- For NLG Main Fitting that have accrued more than 29,000 Flight 

Cycles at the time the Inspection Service Bulletin is published, 

the NLG Main Fitting will be retired within 12 months of 

Inspection Service Bulletin publication. 

- For NLG Main Fitting that have accrued between 20,000 Flight 

Cycles and 28,999 Flight Cycles at the time the Inspection 

Service Bulletin is published, the NLG Main Fitting will be 

retired within 24 months of Inspection Service Bulletin 

publication. 

- For NLG Main Fitting that have accrued between 16,000 Flight 

Date: 12- APR-2012 

Revision: Initial issue 

Printed in England 

ISB.32-186 

Page6of14 
BAE SYSTEMS 

INSPECTION SERVIC E BU LLET IN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

Cycle s a nd 19,999 Flight Cycles at the time the Inspection 

Service Bulletin is publi she d, the NLG main fitting will be 

retired within 36 months of Inspection Service Bulletin 

pub lication. 

- For NLG Main Fi tting that have accru ed less than 16,000 Flight 

Cycles at the time the Inspection Service Bulletin is pub lished , the NLG Main Fitting will be retired once it reaches 16,000 

Flight Cycl es or 36 months after Inspection Service Bulletin 

publication, whichever is later . 

The NLG Main Fi tting live s will be put in Chapter 05-10-15 of the 

AMM at an appropriate time. 

E.Appr ova l 

The technical information contained in this document has been 

approved under the authority of EASA Par t 21 Approval No. 

EASA . 21J.047 . 

F.Manpower 

To in spect as defined in para. 2 - 1 . 0 man-hours. 

This man - hour estimate doe s not include time for gaining access 

to, removal/installation and test of the NLG Main Fitting. 

G.Materials- cost and availability 

Not applicable. 

H.Tooli ng- cost and availability 

Not applicable. 

!.Weight and balance 

No Effec t. 

J.References 

Aircraft Maintenance Manual AMM 32-20-11 

K.Publications affected 

AMM 05-10-15 

L.Electrical load data 

Not applicable . 

Date: 12-APR-2012 

Rev i sion: In itia l issue 

Printed in England 

ISB.32-186 

Page7 of 14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

This Page Is Intentionally Left Blank. 

Date: 12-APR-2012 

Revision: Initial issue 

Printed in England 

ISB.32-186 

Page8of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

2.Accomplishment instructions 

A.General 

(1) The following abbreviations are used within this document:-

AMM -Aircraft Maintenance Manual 

(2) Observe all WARNINGS and CAUTIONS appearing in the AMM 

referred to in this Inspection Service Bulletin . 

NOTE: NLG Main Fitting ca n be re placed local to the aircraft 

i .e. the requirement to send the NLG assemb ly to a 

specialist landing gear maintenance facility can be 

avoided . To achieve local replacement of the NLG Main 

Fitting refer to Messier Services UK or an appropriately approved MRO . 

B.Preparation 

(1) Check the aircraft records to determine landings achieved by 

NLG Mai n Fitting . 

C.Inspection 

(1) Determine compliance para . 1 . D for replacement of the NLG Main 

Fitting. 

(2) Refer to the AMM 32-20-11 page block 401 and replace NLG Main 

Fitting within specified compliance. 

D.Test 

(1) Refer to AMM 32-20-11 page block 401 . 

E.Clo se up 

(1) Make certain work area is clean, and clear of tools and 

miscellaneous equipment. 

F. Documentation 

(1) Complete a copy of Inspection Report attached to this 

Inspection Service Bulletin and return by fax or mail . 

OR 

Return all required Inspection Report details via e-mail . 

Date: 12-APR-2012 

Revision : Initial issue 

Printed in England 

ISB . 32-186 

Page9of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAF T 

This Page Is Intentionally Left Blank. 

Date: 12-APR-2012 

Revision: Initial issue 

Printed in England 

ISB.32-186 

Page10of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

3.Material information 

None. 

Date: 12-APR-2012 

Revision: Initial issue 

Printed in England 

ISB . 32-186 

Page11of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SER IES/AVRO 146-RJ SERIES AIRCRAFT 

This Page Is Inten tio nally Left Blank. 

Date : 12-APR-2012 

Revision: Initial issue 

Printed in England 

ISB.32-186 

Page12of14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

APPENDIX 1 

1 .INSPECTION REPORT 

A.Complete and return this form as detailed 

OPERATOR: 

AIRCRAFT REGISTRATION: 

CONSTRUCTORS NUMBER: 

FLIGHT HOURS: 

LANDINGS: 

DATE INSPECTION PERFORMED: 

FINDINGS: 

To: Customer Technical Support (Building 37), 

BAE SYSTEMS (Operations) limited, 

Prestwick International Airport, 

Ayrshire, 

KA9 2RW, 

Scotland. 

Fax + 44 (Q) 1292 675432 

e-mail raengliaison@baesystems.com 

Date: 12-APR-2012 

Revision: Initial issue 

Printed in England 

ISB.32-186 

Page 13 of 14 
BAE SYSTEMS 

INSPECTION SERVICE BULLETIN 

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

This Page Is In tentional l y Left Blank. 

Date: 12-APR-2012 

Revision: Initial issue 

Printed in Eng l and 

ISB.32-186 

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