# BAE Systems Alert Service Bulletin 32-A189: Revision 2

- Rights: © BAE Systems. Filed by the FAA in regulations.gov docket FAA-2023-2400; AD 2024-06-10 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [BAE Systems Alert Service Bulletin 32-A189](https://openairdocs.org/service-documents/bae-systems/32-a189.md)
- Title as filed: ASB 32-A189 Revision 2
- Pages: 25
- PDF: https://openairdocs.org/files/sha256/0f/ca/0fcab87e193fdccd60a3c8f933627f69da0684e669fff5ec38399deb45312e61
- Page: https://openairdocs.org/service-documents/bae-systems/32-a189/file/0fcab87e193f

## Text

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### Page 1 (OCR)

BAE SYSTEMS (Operations) Limited, Prestwick International Airport, Ayrshire,
KA9  2RW, Scotland.
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
TRANSMITTAL FOR INSPECTION SERVICE BULLETIN REVISION
SERVICE BULLETIN No.ASB.32-A189  ALERT
DATE: 16-SEP-2022
TITLE: LANDING GEAR - MAIN LANDING GEAR SIDESTAY - INSPECTION OF THE
OUTER LINK (LH AND RH) FOR CRACKS AND DIMENSIONAL CHECKS.
REVISION: 2  DATE: 03-AUG-2023
ACTIONS
(1) Remove and discard Alert Service Bulletin (ASB) at revision
(2) Insert ASB at revision 2.
REASON FOR REVISION
(1) Para. 1.C. - Description, revised.
(2) Para. 1.D. - Compliance, revised.
(3) Para. 1.F. - Manpower, revised.
(4) Para. 1.J. - References, revised.
(5) Para.2.A.(1). - General, abbreviations revised.
(6) Para.2.B. - Preperation, revised.
(7) Para.2.C. (1) - Inspection, Part 1, revised.
(8) Para.2.E.(1) - Close up, revised.
(9) Messier-Dowty SB 146-32-147 Appendix A attached.
(10) Editorial.
Date: 16-SEP-2022  REVISION TRANSMITTAL SHEET
ASB. 32-A189
Revision: 2 03-AUG-2023  Page 1 of 2
Printed in England

### Page 2 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
TRANSMITTAL FOR INSPECTION SERVICE BULLETIN REVISION
SERVICE BULLETIN No.ASB.32-A189
This Page Is Intentionally Left Blank.
Date: 16-SEP-2022  REVISION TRANSMITTAL SHEET
ASB. 32-A189
Revision: 2 03-AUG-2023  Page 2 of 2
Printed in England

### Page 3 (OCR)

BAE SYSTEMS (Operations) Limited, Prestwick International Airport, Ayrshire,
KA9  2RW, Scotland.
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
ALERT
TITLE: LANDING GEAR - MAIN LANDING GEAR SIDESTAY - INSPECTION OF THE
OUTER LINK (LH AND RH) FOR CRACKS AND DIMENSIONAL CHECKS.
1.Planning information
A.Effectivity
(1) Aircraft
Aircraft affected by this inspection are defined below:-
BAe 146-301
All BAe 146 100, 200, 300 Series
ALL AVRO 146-RJ70, RJ85, RJ100 Series
B. Reason
An operator recently reported, during routine maintenance,
cracking on the shoulders of the MLG sidestay outer link.
Failure of a MLG sidestay outer link could result in the collapse
of the MLG, which could lead to a runway departure with
corresponding aircraft damage and possible loss of life depending
on the operational environment.
C.Description
At Revision 1, it is necessary that operators carry out a repeat
detailed inspection of the MLG sidestay outer links (Part 1). A
revised one-off dimensional tolerance check is required. This
supersedes the data gathering dimensional tolerance check in the
Original Issue (Part 2). Finally, Revision 1 introduces a calendar
backstop on the Maintenance Review Board Report (MRBR) 32-8
(Maintenance Planning Document (MPD) 323100-LUB-10000-1)
lubrication task (Part 3).
ASB 32-A189 supersedes ISB 32-156, which wilL be cancelled.
At Revision 2, inspection accomplishment instructions are
introduced for operators using Abrasion Resistant paint embodied
on the MLG sidestay outer Links.
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 1 of 16
Printed in England

### Page 4 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
D. Compliance
The technical content of this Alert Service Bulletin (ASB) is
currently subject to mandatory action via UK CAA Airworthiness
Directive (AD) G-2023-0004.
Accomplish the instructions of Part 1 (para 2.C.(1) (a)) within 500
flights or 6 months of last accomplishment of ASB 32-A189,
Revision 1 Part 1 (para 2.C.(1)), whichever is the earlier.
operators using Abrasion Resistant paint embodied on the MLG
sidestay outer links, prior  accomplishment of Part 1 i.a.w. the
instructions in CAA AD G-2023-G0004 satisfies the requirements of
this inspection at Revision 2. Thereatter, repeat every 500
Flights or 6 months, whichever is the earlier.
If the recommendations in BAE Systems Air Prestwick AlL Operator
Message (AOM) 22-013V-2 have been satisfied, then the initial
accomplishment of para 2.C.(1)(a) will have been met.
Alternatively, accomplish the instructions of Part 1 (para
2.C. (1) (b)) within 1,200 flights or 12 months of last
accomplishment of ASB 32-A189, Revision 1, whichever is the
earlier. Thereafter, repeat every 1,200 flights or 12 months
whichever is the earlier.
The Inspection regime can either be a Detailed Visual Inspection
every 500 flights, or every 6 months, whichever is the earlier, as
ber Part 1 (para 2.C.(1)(a)), or a Detailed Visual and Special
Detailed Inspection every 1,200 flights, or every 12 months,
whichever is the earlier, as per Part 1 (para 2.c. (1) (b)).
NOTE: The Operator can alternate between Part 1 (para 2.C.(1) (a))
and Part 1 (para 2.C.(1) (b)), but the inspection interval
must be rigorously controlled by the Maintenance Schedule
based on the last accomplished inspection.
Accomplish the instructions of Part 2 (para 2.C.(2)) within 6
months of publication of Revision 1 of this ASB. For operators
using Abrasion Resistant paint embodied on the MLG sidetay outer
Links, prior accomplishment of Part 2 i.a.w. the instructions in
CAA AD  G-2023-G0004 satisfies the requirements of this inspection
at Revision 2.
Accomplish the instructions of Part 3 (para 2.C. (3)) within 6
months of publication of Revision 1 of this ASB. Thereafter,
repeat every 500 flights or 6 months, whichever is the earlier.
It is recommended that accomplishment of Part 3 is aligned with
accomplishment of Part 1.
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 2 of 16
Printed in England

### Page 5 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
E.Approval
The technical content of this document is approved under the
authority of the DOA Ref.UK.21J.0047.
The technical content of this document is approved under the
authority of the UK CAA design organisation approval reference:
AD/ 1852/05.
F. Manpower
To inspect as defined in para. 2
Part 1 (para 2.C. (1)(a)) 0.5 man-hours per MLG sidestay outer
Link.
Part 1 (para 2.C.(1) (b)) 1.0 man-hours per MLG sidestay outer
Link.
Part 2 (para 2.C.(2)) 1.0 man-hours per MLG sidestay outer Link.
Part 3 (para 2.C.(3)) 0.5 man-hours per MLG sidestay outer link.
This man-hour estimate does not include time for gaining access
to, or cleaning, the inspection area.
G.Materials - cost and availability
None.
H.Tooling - cost and availability
Not applicable.
I.Weight and balance
Not applicable.
J.References
AMM 12-20-21.
AOM 22-013V-2.
Maintenance Review Board Report, 32-8.
Maintenance Planning Document, 323100-LUB-10000-1.
Modification Service Bulletins 53-217-61122A, 53-223-60809G,
53-227-60877A, 53-232-60809H and 53-248-61147A.
Safran Landing Systems SB 146-32-179. (copy attached)
Safran Landing Systems CMM 32-10-36.
Safran Landing Systems CMM 32-10-65.
Safran Landing Systems CMM 32-10-73.
Messier-Dowty SB 146-32-147 Appendix A. (copy attached)
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 3 of 16
Printed in England

### Page 6 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
K.Publications affected
Maintenance Review Board Report.
Maintenance Planning Document.
NOTE: The Maintenance Review Board Report and Maintenance Planning
Document will be reviewed, for inclusion of a scheduled
task.
L. Electrical load data
Not applicable.
M. Software Accomplishment Summary
Not applicable.
N.Aircraft Noise Levels
Not applicable.
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 4 of 16
Printed in England

### Page 7 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
2.Accomplishment instructions
A. GeneraL
The following abbreviations are used within this document:-
AMM - Aircraft Maintenance Manual
ASB - Alert Service Bulletin
FDP - Fluorescent Dye Penetrant
MLG - Main Landing Gear
i.a.w. - in accordance with
MPD - Maintenance Planning Document
MRBR - Maintenance Review Board Report
NDT - Non-Destructive Testing
PCN - Personnel Certification in Non-Destructive Testing
SB - Service Bulletin
SLS - Safran Landing Systems
B. Preparation
(1) Gain access to the LH and RH MLG.
(2)  For aircraft with BAE Systems Air Prestwick SB 53-217-61122A,
53-223-60809G, 53-227-60877A, 53-232-60809H or 53-248-61147A
embodied, Abrasion Resistant paint local to the area of
inspection is to be stripped in accordance with SLS CMM
32-10-36, 32-10-65 or 32-10-73, as appropriate.
C.Inspection
Part 1
Refer to Drawing 2. Perform an inspection of the areas
indicated in Drawing 2 (view on arrow 'C') as follows:
(a) Carry out a Detailed Visual Inspection in accordance with
SLS SB 146-32-179 (copy attached). In the event that a
crack is detected, record the findings in Appendix 1 and
return to BAE Systems Air Prestwick.
or
(b) Carry out a fluorescent dye penetrant (FDP) inspection in
accordance with Messier-Dowty SB 146-32-147 Appendix A
(copy attached). Once the FDP inspection has been
accomplished, reinstate the Abrasion Resistant paint in
accordance with BAE Systems Air Prestwick SB 53-217-61122A,
53-223-60809G, 53-227-60877A, 53-232-60809H or
53-248-61147A, as appropriate. In the event that a crack is
detected, record the findings  in Appendix 1 and return to
BAE Systems Air Prestwick.
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 5 of 16
Printed in England

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BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
Part 2
(2) Perform dimensional checks as follows:
(a) Record/photograph of the MLG sidestay outer link only part
number, serial number (located on the inboard side) and any
markings relative to concessions/repairs performed on the
part. Also, specify right hand/left hand. Record in
accordance Appendix 2 of ASB 32-A189.
(b) Refer to Drawing 2. Measure the dimensions 'B1' and 'B2' in
the area of inspection shown in Drawing 2. Measure each
dimension at a minimum of at least 4 locations to ensure
the minimum dimension is recorded.
NOTE: Dimensions (inches) to be recorded to 3 decimal
places, using appropriate measurement equipment.
(c) Determine the status of the MLG sidestay outer link in
accordance with the dimensional assessment flowchart in
Drawing 3. Record in accordance Appendix 2 of ASB 32-A189.
(d) Return the data recorded in Appendix 2 of ASB 32-A189 to
BAE Systems Air Prestwick.
Part 3
(3)  Refer to AMM 12-20-21 (MRBR 32-8, MPD 323100-LUB-10000-1).
Lubricate the MLG sidestay outer  link pivots.
D.Test
Not applicable.
E. Close up
(1) If the surface finish has been removed and the sidestay outer
Link is to be returned to service, restoration of the finish
is performed in accordance with the applicable Safran Landing
Systems CMM 32-10-36 or 32-10-65 or 32-10-73 Repair paragraph
3.A. Where Abrasion Resistant paint is also required, it is
additionally to be applied in accordance with BAE Systems SB
53-217-61122A, 53-223-60809G, 53-227-60877A, 53-232-60809H or
53-248-61147A, as applicable.
(2) Make sure work area is clean, and clear of tools and
miscellaneous equipment.
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 6 of 16
Printed in England

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BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
F. Documentation
Return all required Inspection Report details (see Appendices 1
and 2) via e-mail to raengliaisonabaesystems.com
G.Ierminating action
(1) None.
Revis 16: 2P-3-AU6-2023  A583-0110
Printed in England

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BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
UPLOCK  RETRACTION DIRECTION
UNIT  JACK  LINK
OLEO LOCK
JACK
DOWNLOCK  - CRANK
UPLOCK  JACK
JACK
SPRING
NOTE:
APPLY GREASE
ASSISTER  HERE
JACK  NEW LABEL
SIDESTAY
VIEW ON ARROW 'A'
OUTER LINK
n32a18901
INSPECTION OF MLG SIDESTAY OUTER LINK
DRAWING 1.
Date: 16-SEP-2022  ASB. 32-A189
Revision: 2 03-AUG-2023  Page 8 of 16
Printed in England

### Page 11 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
D'
DIMENSION 'B1'  DIMENSION 'B2
VIEW ON ARROW 'C'  (MINIMUM WALL  THICKNESS)  (MINIMUM WALL  THICKNESS)
* INSPECT FOR CRACKS
AT ALL LOCATIONS  DIMENSION
INDICATED  'A
DAŤUM
2.00 in. (50.80 mm)
AREA OF INSPECTION
VIEW ON ARROW 'D'
UPPER SURFACE SHOWN
LOWER SURFACE SIMILAR
THE Z DATUM SHOWS THE EDGE OF THE POCKET.
MEASURE DIMENSIONS 'B1' AND 'B2' AT A MINIMUM
OF AT LEAST 4 LOCATIONS TO ENSURE THE
MINIMUM DIMENSION IS RECORDED. DIMENSIONS
(IN INCHES) TO BE RECORDED TO 3 DECIMAL
PLACES, USING APPROPRIATE MEASURING
EQUIPMENT.
SECTION 'B-B'
n32a018902
INSPECTION OF MLG SIDESTAY OUTER LINK
DRAWING 2.
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 9 of 16
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### Page 12 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
MEASURE
MINIMUM
WALL
SECTION
'B1' AND 'B2'
IF
'B1' AND  IF
OR 'B2  'B1' AND 'B2'
<0.137 in  ≥ •0.137 in.
(3.479 mm)  (3.479 mm)
LOCALLY  NO
STRIP PAINT/  ACTION
SURFACE  NECESSARY  IF 'B1' AND/OR 'B2' IS LESS THAN 0.137 in. (3.479 mm),
TREAMENTS
PAINT/CADMIUM PLATING IS REQUIRED TO
BE STRIPPED TO ENSURE AN ACCURATE
MEASUREMENT CAN BE TAKEN.
PAINT STRIP IN ACCORDANCE WITH SLS
RE-MEASURE  CMM 32-10-36, 32-10-65 OR 32-10-73 (AS
MINIMUM  APPROPRIATE) REPAIR, PARA 2.B
WALL
SECTION
'B1' AND/OR 'B2'
B1' AND  IF ONCE STRIPPED 'B1' AND/OR 'B2' MEASURES
OR 'B2'  'B1' AND 'B2  LESS THAN 0.116 in. (2.946 mm), FURTHER
<0.116 in.  2•0.  116 in.  ASSESSMENT OF THE MLG SIDESTAY OUTER
(2.946 mm)  (2.946 mm)  LINK WILL BE REQUIRED BY SAFRAN LS
FOR CONTACT DETAILS SEE APPENDIX 2.
RE-APPLY PROTECTIVE TREATMENTS/PAINT
IN ACCORDANCE WITH SLS CMM 32-10-36:
32-10-65 OR 32-10-73 (AS APPROPRIATE)
REMOVE FROM  RE-APPLY  REPAIR, PARA 3.A
SERVICE. CONTACT  PROTECTIVE
BAE SYSTEMS/  TREATMENTS/PAINT
SAFRAN LS  AND RETURN
FOR FURTHER  PART TO
ASSESSMENT  SERVICE
n32a018903
MLG SIDESTAY OUTER LINK DIMENSIONAL ASSESSMENT
DRAWING 3.
Date: 16-SEP-2022  ASB. 32-A189
Revision: 2 03-AUG-2023  Page 10 of 16
Printed in England

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BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
3.Material information
Not applicable.
evision: 2 03-AUG-202  ate: 16-SEP-202  Asge 17-0716
Printed in England

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BAE SYSTEMS
BAe 146 SEREESTAVR SERVE SERLES AIRCRAFT
This Page Is Intentionally Left Blank.
Revisi 6-S 2P-3-AUG-2023  A558320710
Printed in England

### Page 15 (OCR)

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:
CONSTRUCTOR'S 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.
e-mail raengliaison@baesystems.com
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 13 of 16
Printed in England

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BAE SYSTEMS
BAe 146 SEREESTAVR SERVE SERLES AIRCRAFT
This Page Is Intentionally Left Blank.
Revisi 6-S 2P-3-AUG-2023  Age 12-0116
Printed in England

### Page 17 (OCR)

BAE SYSTEMS
INSPECTION SERVICE BULLETIN
BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
APPENDIX 2
1. DIMENSIONAL INSPECTION REPORT
MLG SIDESTAY OUTER LINK
Aircraft Type
Operator
Constructor's Number
Part Number
Serial Number
Special Marking
(Concession/Repair)
UPPER SURFACE  LOWER SURFACE
Dimension (Inches)  LH  RH  LH  RH
as per Drawing 2.
Dimensions (in inches)  B1 =  B1 =  B1 =  B1 =
to be recorded to 3
decimal places, using
appropriate measurement  B2 =  B2 =  B2 =  B2 =
equipment.
If B1 and B2 are ≥0.116 inches with protective treatments removed, then no
further action required.
If B1 and/or B2 are <0.116 inches with protective treatments  removed, then
contact Safran Landing Systems before return to service.
Safran Landing Systems UK Ltd.
Cheltenham Road East, Gloucester, GL2 9QH, United Kingdom.
Tel: +44(0) 1452 712424
Web: safran-landing-systems.com
Return this form to:-
Customer Technical Support (Building 37),
BAE Systems Air Prestwick,
Prestwick International Airport,
Ayrshire,
KA9 2RW,
United Kingdom.
e-mail:  raengliaison@baesystems.com
Date: 16-SEP-2022  ASB.32-A189
Revision: 2 03-AUG-2023  Page 15 of 16

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BAE SYSTEMS
BAe 146 SERES ARO - SERIES AIRCRAFT
This page is intentionally left blank
ASB. 32 - A18
208001

### Page 19 (OCR)

Messier-Dowty
snecma group
Messier-Dowty Ltd
SERVICE BULLETIN
APPENDIX A
MESSIER-DOWTY LIMITED GLOUCESTER
PROCESS DEPARTMENT - NON-DESTRUCTIVE TEST DIVISION
PRODUCT SUPPORT TECHNIQUE NO. 273/P
Penetrant Inspection of the BAe146 Main Landing Gear Side Stay Outer Link outboard webs
1. Scope
1.1. This technique is designed for the detection of cracks associated with the BAe146 Main Landing
Gear Side Stay Outer Link outboard webs adjacent to the Main Fitting lower lugs.
1.2. All four webs on each unit must be inspected.
1.3.  This technique is designed for in-situ inspection on the aircraft using fluorescent penetrant, remover
and developer materials of the same family in accordance with MIL-1-25135 QPL 25135 Type 1,
Method B Level IV.
1.4. _ This technique is only valid when carried out by skilled NDT penetrant practitioners qualified to PCN
Level 2 or equivalent.
1.5. This technique is based on Messier-Dowty Limited M-DLNDT8 standard procedure.
2. Equipment
2.1. A high sensitivity post emulsified thixotropic fluorescent penetrant such as Ardrox 985 P 14 or
equivalent.
2.2. Penetrant remover Ardrox 9 PR 3 or equivalent.
2.3. Non-aqueous wet developer Ardrox 9 D 6 or equivalent.
2.4. Clean lint free cloths or tissues.
2.5. Clean water.
2.6. Cold hydrocarbon or chlorinated hydrocarbon cleaning fluid.
2.7. An ultraviolet black light inspection lamp to M-DLNDT8 requirements to BS4489.
WARNING: THE PENETRANT INSPECTION MUST BE CARRIED OUT IN A SAFE, CLEAN, DARKENED,
WELL VENTILATED AREA SUITABLE FOR ULTRAVIOLET INSPECTION. OBSERVE ALL
NECESSARY SITE SAFETY PRECAUTIONS - EYE PROTECTION, BREATHING MASKS AND
GLOVES MUST BE WORN AS NECESSARY.
3. Procedure
3.1. Following chemical and Scotchbrite local removal of paint and cadmium, thoroughly pre-clean the
areas shown in Figure 2 using cold hydrocarbon or chlorinated hydrocarbon cleaning fluid.
3.2. Visually inspect the test areas to ensure a suitably smooth surface finish for high sensitivity
fluorescent penetrant inspection and freedom from grease, corrosion, debris, metal smearing or
mechanical damage which could interfere with the inspection.
3.3.  Carefully apply thixotropic penetrant to the test area by brush and allow a contact time of 25 minutes.
Use only enough penetrant for the area being inspected to avoid over application.
3.4. Wipe off surplus penetrant with clean dry cloths or tissues.
Appendix A
May 29/2001  Service Bulletin No. 146-32-147
Page 1 of 2

### Page 20 (OCR)

Messier-Dowty
snecma group
Messier-Dowty Ltd
SERVICE BULLETIN
3.5. View under ultraviolet light to ensure removal of penetrant.
3.6. Rapidly remove final traces of penetrant using cloths sprayed with penetrant remover followed by
wiping with clean damp cloths or tissues and secondly with clean dry cloths or tissues.
3.7. Further view under ultraviolet light to ensure removal of final traces of visible penetrant, penetrant
remover and water.  - Test areas must be in a clean dry state free from all penetrant or penetrant
remover residue before applying developer.
3.8. Sparingly apply non-aqueous wet developer ensuring a thin even coating throughout the area being
inspected.
3.9. View instantly and periodically up to 20 minutes developer dwell time using ultraviolet light in a
suitably darkened environment during the development period
3.10. Record and investigate all relevant findings.
3.11. Clean the area with a suitable cleaning agent.
4. Inspection Standard
4.1. All cracking which may be cause for rejection shall be reported to the Technical Manager of the
regional Messier Services Customer Support Centre.
Appendix A
May 29/2001  Service Bulletin No. 146-32-147
Page 2 of 2

### Page 21 (OCR)

S SAFRAN  SAFRAN LANDING SYSTEMS UK Ltd
CAGE: K0654
Cheltenham Road, Gloucester, GL2 9QH, England
Telephone: +44 (0) 1452 712424
www.safran-landing-systems.com
SERVICE BULLETIN
MAIN LANDING GEAR - INSPECTION OF THE OUTER LINK
Planning Information
A.  Effectivity
Aircraft affected: BAe 146 All Series
AVRO 146-RJ All Series
Unit affected:  Outer Link
Part/Type Nos.:  200884304
200884305
200884346
200884347
201105300
201105301
201105308
201105309
201299300
201299301
201299305
201299306
Serial Number: All Outer Links
B. Concurrent Requirements
(1) None.
C. Reason
(1) Introduction of a repetitive inspection for cracks in the outer link, as cracks on the
shoulder of outer links have been identitied.
D.  Description
Safran Landing Systems tells operators that it will be necessary to do this Service
Bulletin on all BAe 146 and AVRO 146-RJ outer link part numbers listed in Para 1.A
above.
Compliance
(1) Recommended
(a) Recommended within 500 Flight Cycles or 6 months (whichever occurs soonest)
from the issue date of this SB.
(b) This inspection is to be repeated at intervals of 500 Flight Cycles or 6 months
(whichever occurs soonest).
© SAFRAN LANDING SYSTEMS 2023 (AND SUBSEQUENT REVISION PAT Salian Lan  This document and all information contained herein is the sole property of Safran Landing Systems (and/or its affiliated companies). 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 Safran Landing Systems (and/or the appropriate affiliated company).
Service Bulletin No. 146-32-179
Mar 10/2023  Page 1 of 5

### Page 22 (OCR)

S SAFRAN  SAFRAN LANDING SYSTEMS UK Ltd
CAGE: K0654
SERVICE BULLETIN
F. Approval
(1) The inspection procedures described in this SB are reviewed and technically accepted
by BAe Systems to apply to all BAe 146 and AVRO 146-RJ fleet aircraft. This SB does
not contain any change information that revises the equipment definition.
G. Manpower
(1) Safran Landing Systems makes an estimate that it will take approximately
1 man-hour to do this Service Bulletin for each outer link.
H. Weight and Balance
(1) None.
I. References
(1) Safran Landing Systems UK Ltd Component Maintenance Manual 32-10-36
(2) Safran Landing Systems UK Ltd Component Maintenance Manual 32-10-65
(3) Safran Landing Systems UK Ltd Component Maintenance Manual 32-10-73
Other Publications Affected
(1) None.
2.  Material Information
A. None
B. Tooling
(1) None
3.  Accomplishment Instructions
The figure/item numbers in parentheses in the text agree with those used in the illustrated
parts list. Only the primary numbers are used.
A. Procedure
(1) To inspect the outer link (Refer to CMM 32-10-36, 32-10-65, 32-10-73 and Figures 1
and 2 of this Service Bulletin)
Clean the outer link (4-150 or 4-160, CMM 32-10-36) or (4-150 or 4-160, CMM
32-10-65) or (4-150 or 4-160, CMM 32-10-73); refer to CLEANING in the applicable
CMM.
(3) Perform a detailed visual inspection (using 10x magnification) of the outer link (4-150 or
4-160, CMM 32-10-36) or (4-150 or 4-160, CMM 32-10-65) or (4-150 or 4-160, CMM
32-10-73) to check for any signs of cracks, with specific focus on the four areas defined
in Figure 2.
(4) If there is any indication of cracking, remove the outer link (4-150 or 4-160, CMM
32-10-36) or (4-150 or 4-160, CMM 32-10-65) or (4-150 or 4-160, CMM 32-10-73) and
contact Safran Landing Systems for further advice.
B. Identification
(1) After you have done this Service Bulletin, write the Service Bulletin number 146-32-179
in the applicable aircratt and landing gear records.
Service Bulletin No. 146-32-179
Mar 10/2023  Page 2 of 5

### Page 23 (OCR)

S SAFRAN  SAFRAN LANDING SYSTEMS UK Ltd
CAGE: K0654
SERVICE BULLETIN
RETRACTION  DIRECTION LINK
JACK
UPLOCK UNIT
OLEO LOCK
JACK
UPLOCK
JACK
CRANK
SPRING
SIDE STAY
ASSISTER JACK
DOWNLOCK JACK
B1468031-1
Figure 1 - Side Stay Location
Service Bulletin No. 146-32-179
Mar 10/2023  Page 3 of 5

### Page 24 (OCR)

S SAFRAN  SAFRAN LANDING SYSTEMS UK Ltd
CAGE: K0654
SERVICE BULLETIN
INSPECT FOR CRACKS
AT ALL 4 LOCATIONS
INDICATED *
*
ZA
VIEW ON ARROW Z
B1469838-1
Figure 2 - Location of Inspection
Service Bulletin No. 146-32-179
Mar 10/2023  Page 4 of 5

### Page 25 (OCR)

S SAFRAN  SAFRAN LANDING SYSTEMS UK Ltd
CAGE: K0654
SERVICE BULLETIN
Safran  Landing  Systems and  _ Safran Landing Systems Services Contacts
A.  Refer to the Safran Landing Systems website (safrangroup.com) for the latest list of contact
names, addresses and numbers.
Original Equipment Manufacturers
Satran Landing Systems Canada Inc. Safran Landing Systems UK Ltd  Safran Landing Systems SAS
574 Monarch Avenue  Cheltenham Road  Site Jean-Paul Béchat
Ajax, Ontario  Gloucester  Inovel Parc Sud
L1S 2G8  GL2 9QH  7, rue Général Valérie André
CANADA  ENGLAND  78140 Vélizy - Villacoublay
Tel: 905-683-3100  Tel: +44(0)1452 712424  FRANCE
Fax: 905-683-6936  Fax: +44(0) 1452 713821  Tel: +33 146 29 81 00
Fax: +33 146 29 8770
Customer Support Centers (CSC)
For AOG (commercial and technical): aogcsc.sis@satrangroup.com
For Europe - Africa - Middle East customers: eamecsc.sls@safrangroup.com
Tel: +33 1 5521 2590
For Americas customers: americascsc.sls@safrangroup.com
Tel: +1 404 305 2626
For Asia-Pacific customers: asiacsc.sls@safrangroup.com
Tel: +65 6245 5688
Repair and Overhaul Facilities
Safran Landing Systems Canada Inc.  Safran Landing Systems  Safran Landing Systems SAS
574 Monarch Avenue  Services UK Ltd  3, rue Antoine de St Exupery,
Ajax, Ontario  Meteor Business Park  BP110
L1S 2G8  Cheltenham Road  67124 Molsheim Cedex
CANADA  Gloucester GL2 9QL  FRANCE
Tel: 905-683-3100  ENGLAND  Tel: (33) 38838 9200
Fax: 905-683-0378  Tel: +44(0)1452 713111  Fax: (33) 38838 9399
Fax: +44(0)1452 716500
Safran Landing Systems Services  Safran Landing Systems  HYDREP Aéroport de
Singapore Pte Ltd  Services Americas SA de CV  Dinard-Pleurtuit-Saint-Malo
21 Loyang Crescent,  Av. La Noria  Bâtiment 20
Loyang Industrial Estate  Parque Industrial Querétaro  BP90154
SINGAPORE 508985  Carretera QRO-SLP, Km. 28.5  35801 DINARD Cedex
Tel: (65) 6545 9455  Querétaro, QRO 76220  FRANCE
Fax: (65) 6542 3936  MEXICO  Tel: (33) 2 99 82 79 79
Tel: +52 (442) 19 25 800  Fax: (33) 2 99 82 79 97
Fax: +52 (442) 19 25 801
Service Bulletin No. 146-32-179
Mar 10/2023  Page 5 of 5

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