# BAE Systems Alert Service Bulletin 32-A189: ASB.32-A189 - Rights: © BAE Systems. Filed by the FAA in regulations.gov docket FAA-2022-1574; AD 2022-25-18 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 - Pages: 14 - PDF: https://openairdocs.org/files/sha256/2c/50/2c50a4e20842f97e77742e2308f4ce6254453daf4fcb32fd44ffe91c535ab84c - Page: https://openairdocs.org/service-documents/bae-systems/32-a189/file/2c50a4e20842 ## Text Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 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 Operators with main landing gear (MLG) Sidestay outer links with the Safran Landing Systems (SLS) part numbers: 200884304, 200884305, 200884346, 200884347, 201105300, 201105301, 201105308, 201105309, 201299300, 201299301, 201299305, 201299306. B.Reason An operator recently reported, during routine maintenance, cracking on the shoulders of the MLG sidestay outer link. Evidence indicates that some MLG sidestay outer links may have incorrect dimensions that could be the cause of cracking. 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 It is necessary that operators carry out a one off detailed inspection and dimensional tolerance check of the MLG sidestay outer links, and provide feedback accordingly. SLS and BAE Systems Air Prestwick will assess the reported dimensions and advise operators of any resulting necessary action, which may either require change tothe currently declared MLG sidestay outer link airworthiness limitation, or be declared non-airworthy, requiring immediate replacement in-service. BAE SYSTEMS (Operations) Limited, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland. ALERT INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page1of14 Printed in England ### Page 2 D.Compliance The technical content of this Alert Service Bulletin (ASB) is the subject of UK CAA Airworthiness Directive consultation. Accomplish the instructions of para 2.C.(1) and 2.C.(2), within one month of the date of this ASB. If the recommendations in BAE Systems Air Prestwick All Operator Message (AOM) 22-013V-2 have been satisfied, then the instructions of para 2.C.(1) will have been met. 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 Toinspect as defined in para. 2 1.0 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 Cost and Availability is by arrangement between the Operator and BAE Systems. H.Tooling - cost and availability Not applicable. I.Weight and balance Not applicable. J.References AOM 22-013V-2. K.Publications affected Not applicable. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page2of14 Printed in England ### Page 3 L.Electrical load data Not applicable. M.Software Accomplishment Summary Not applicable. N.Aircraft Noise Levels Not applicable. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page3of14 Printed in England ### Page 4 This Page Is Intentionally Left Blank. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page4of14 Printed in England ### Page 5 2.Accomplishment instructions A.General (1) The following abbreviations are used within this document:- ASB - Alert Service Bulletin MLG - Main Landing Gear SLS - Safran Landing Systems B.Preparation (1) Gain access tothe LH and RH MLG. C.Inspection (1) Perform a Detailed Inspection of the areas indicated in Drawing 1 (view on arrow ’A’) as follows: (a) Clean the MLG sidestay outer link. Use white spirit. (b) Use a magnifying glass (x 5 magnification or greater) and examine the MLG sidestay outer link for any sign of cracks through the paint in the four areas indicated: refer to Drawing 1 (view on arrow ’A’). In the event that a crack is detected, record the findings in Appendix 1 and return toBAE Systems Air Prestwick. (2) Refer to Drawing 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 using the Appendix 2. (b) Record/photograph, using a ruler or Vernier calliper, dimensions ’A’, ’B1’, ’B2’, ’C1’ and ’C2’, as shown in Drawing 2 for both the upper and lower surfaces. Record using the Appendix 2. (c) Return the data recorded in Appendix 2 to BAE Systems Air Prestwick. SLS and BAE Systems Air Prestwick will assess the reported dimensions and advise operators of any resulting necessary action, which may either require change to the currently declared MLG sidestay outer link airworthiness limitation, or be declared non-airworthy, requiring immediate replacement in-service. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page5of14 Printed in England ### Page 6 D.Test Not applicable. E.Close up (1) Make sure work area is clean, and clear of tools and miscellaneous equipment. F.Documentation Return all required Inspection Report details (see Appendices 1 and 2) via e-mail toraengliaiso n@baesystems.co m G.Terminating action (1) None. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page6of14 Printed in England ### Page 7 (OCR) 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 * INSPECT FOR CRACKS AT ALL LOCATIONS INDICATED OUTER LINK A VIEW ON ARROW "A' n32a18901 INSPECTION OF MLG SIDESTAY OUTER LINK DRAWING 1. Date: 16-SEP-2022 ASB. 32-A189 Revision: Initial issue Page 7 of 14 Printed in England ### Page 8 (OCR) BAE SYSTEMS INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT DIMENSION B1 - DIMENSION B2 (MINIMUM WALL (MINIMUM WALL THICKNESS) THICKNESS) DIMENSION A DIMENSION C1 - — DIMENSION C2 VIEW ON ARROW 'B' UPPER SURFACE SHOWN LOWER SURFACE SIMILAR n32a018902 INSPECTION OF MLG SIDESTAY OUTER LINK DRAWING 2. Date: 16-SEP-2022 ASB. 32-A189 Revision: Initial issue Page 8 of 14 Printed in England ### Page 9 3.Material information Not applicable. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page9of14 Printed in England ### Page 10 This Page Is Intentionally Left Blank. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page10of14 Printed in England ### Page 11 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: Custo mer Technical Support (Building 37), BAE Systems Air Prestwick, Prestwick International Airport, Ayrshire, KA9 2RW, United Kingdom. e-mail raengliaison@baesystems.com INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page11of14 Printed in England ### Page 12 This Page Is Intentionally Left Blank. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page12of14 Printed in England ### Page 13 INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page 13 of 14 APPENDIX 2 1. DIMENSIONAL INSPECTION REPORT A. Complete and return this form as detailed MLG SIDESTAY OUTER LINK Aircraft Type Operator Constructor’s Number Part Number Serial Number Special Marking (Concession/Repair) UPPER SURFACE LOWER SURFACE Dimension (Inches) as per Drawing 2. Use Ruler or Vernier Calliper. LH RH LH RH A = A = A = A = B1 = B1 = B1 = B1 = B2 = B2 = B2 = B2 = C1 = C1 = C1 = C1 = C2 = C2 = C2 = C2 = 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 ### Page 14 This Page Is Intentionally Left Blank. INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Date: 16-SEP-2022 ASB.32-A189 Revision: Initial issue Page14of14 Printed in England --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.