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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
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
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
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
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
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
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
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
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
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
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 Printed in England
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