{"id":"F2019L00137","name":"AD/TBM 700/54 Landing Gear - Wheels & Brakes - Master Cylinder Yoke - Inspection/Replacement","slug":"ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":98770,"registerId":"commonwealth-F2019L00137-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Socata (Aerospatiale) TBM700 Series Aero","sectionType":"part","heading":"Socata (Aerospatiale) TBM700 Series Aeroplanes","content":"# Socata (Aerospatiale) TBM700 Series Aeroplanes\n\n| AD/TBM 700/54 | Landing Gear - Wheels & Brakes - Master Cylinder Yoke - Inspection/Replacement | 4/2019 |\n| ------------- | ------------------------------------------------------------------------------ | ------ |\n\n| Applicability: | Socata TBM 700 aircraft with serial number (S/N) 1 to 268 and S/N 270 to 338 inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Check for misalignment of the master cylinder yokes from their threaded pins, as instructed in the accomplishment instructions paragraph of the SOCATA Service Bulletin 70-136 (the SB), as in force from time to time,a. If a yoke is satisfactory, proceed to its re-installation on the aircraft, orb. If a yoke is defective, discard the yoke and install a new serviceable one that meets the terms of the SB.2. Do not install yokes part number (P/N) ZOO.N7134732200 or yokes in master cylinder assembly P/N ZOO.N6068757280 (LH side) and ZOO.N6068757281 (RH side) delivered as spares before 1 December 2005 unless they comply with SOCATA Service Bulletin N° 70-136, as in force from time to time.Recording completion of this AD in the aircraft logbook can only be done after a satisfactory inspection and/or replacement of all defective yokes.Note 1: EASA AD 2006-0189 refers.Note 2: The words “as in force from time to time” require compliance with the most recent version of the referenced document. |\n| Compliance:    | 1. Unless previously accomplished, during the next 100-hourly scheduled inspection, or during the next annual inspection, whichever occurs later.2. From the commencement date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n|                | This AD commences on 22 February 2019.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | This AD results from a report of a master cylinder yoke failure.The AD requirements are to detect defective yokes on aircraft or held as spares and replace them with new ones.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n\n|     | The aim of this AD is to ensure that normal braking is available at any time to prevent possible runway excursions in the event of failure of the master cylinder yoke. |\n| --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.jpeg)\n\nPieter van Dijk  \nDelegate of the Civil Aviation Safety Authority\n\n11 February 2019","sortOrder":0},{"sectionNumber":"AD/TBM 700/54","sectionType":"part","heading":"AD/TBM 700/54","content":"## AD/TBM 700/54","sortOrder":1},{"sectionNumber":"Landing Gear - Wheels & Brakes - Master ","sectionType":"part","heading":"Landing Gear - Wheels & Brakes - Master Cylinder Yoke - Inspection/Replacement","content":"## Landing Gear - Wheels & Brakes - Master Cylinder Yoke - Inspection/Replacement","sortOrder":2},{"sectionNumber":"4/2019","sectionType":"part","heading":"4/2019","content":"## 4/2019","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains focused on the TBM700 serial-numbered fleet and specified spare parts to identify and replace defective master cylinder yokes. The AD implements inspection/replacement and a prohibition on specified parts unless they meet the referenced Service Bulletin; it does not expand applicability beyond those listed aircraft or introduce new categories of obligation (Applicability; Requirement; Background)."},"complexity_factors":["Narrow numeric applicability limited to specific serial numbers (Applicability).","Technical inspection standard tied to an external document: SOCATA Service Bulletin 70-136 (Requirement para 1) creating ongoing conformity obligations ('as in force from time to time').","Explicit prohibited part numbers and assemblies with a date condition (Requirement para 2) requiring parts-history checks.","Compliance timing defined by inspection intervals (next 100‑hour or next annual inspection) rather than a fixed calendar deadline (Compliance).","Logbook-entry condition: recording only after satisfactory inspection/replacement increases administrative sequencing (Requirement).","Cross-reference to prior regulatory action (EASA AD 2006-0189) that may affect interpretation (Note 1).","Operational consequence limited to inspection/replacement of a single component but requires mechanical judgment about 'misalignment' (technical assessment)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Socata TBM 700 aeroplanes (S/N 1–268 and 270–338) to inspect the master cylinder yokes for misalignment and to discard and replace any defective yokes, following SOCATA Service Bulletin 70-136. It also prohibits installing certain yoke part numbers or specified master cylinder assemblies delivered as spares before 1 December 2005 unless they comply with that Service Bulletin. The work must be done at the next 100‑hour or next annual inspection (whichever is later) and logged only after satisfactory inspection or replacement."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains focused scope on the specific master cylinder yoke defect. The serial number limitations and part number restrictions keep it tightly bounded to the identified safety risk without scope creep."},"complexity_factors":["Single, discrete safety issue (one component failure mode)","Only 2 main compliance paths (inspect/replace or replace outright)","Limited applicability (specific serial number ranges)","Clear cross-reference to external technical document (Service Bulletin 70-136) with explicit 'as in force' incorporation","Simple binary decision tree (satisfactory vs defective)","No nested exceptions or conditional sub-clauses","Short document (approximately 300 words of substantive content)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection of brake master cylinder yokes on Socata TBM 700 aircraft (S/N 1–268, 270–338), requires replacement of any defective yoke, and prohibits installing certain spare part numbers unless they meet updated standards. \n\nIt must be complied with by the next 100‑hour or annual inspection (whichever is later) from 22 Feb 2019; it’s safety‑critical because yoke failure can cause total brake loss. Use the current version of the referenced service bulletin."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement","history":"/api/acts/ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement/history","analysis":"/api/acts/ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement/analysis","conflicts":"/api/acts/ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement/conflicts","importantCases":"/api/acts/ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement/important-cases","documents":"/api/acts/ad-tbm-700-54-landing-gear-wheels-brakes-master-cylinder-yoke-inspection-replacement/documents"}}