{"id":"F2008L01201","name":"AD/TBM 700/49 - Emergency Landing Gear By-pass Selector Inspection","slug":"ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73426,"registerId":"commonwealth-F2008L01201-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aerospatiale (Socata) TBM 700 Series Aer","sectionType":"division","heading":"Aerospatiale (Socata) TBM 700 Series Aeroplanes","content":"### Aerospatiale (Socata) TBM 700 Series Aeroplanes\n\n| AD/TBM 700/49 | Emergency Landing Gear By-passSelector Inspection | 7/2008 TX |\n| ------------- | ------------------------------------------------- | --------- |\n\n| Applicability: | EADS Socata TBM 700 N (commercial designation TBM 850) aircraft, serial numbers 364, 367 and 370 to 435 inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For aircraft on which the affected floor panel has been removed during maintenance and aircraft for which it cannot be determined that any such removal did not occur, check the gap between the landing gear control button and the floor panel in accordance with paragraph (§) A of the Accomplishment Instructions of EADS Socata Service Bulletin (SB) 70-154-53 and, if the gap is found to be insufficient, modify the floor panel in accordance with § C of the Accomplishment Instructions of EADS Socata SB 70-154-53;2. For aircraft on which the affected floor panel has not been removed during maintenance, modify the floor panel in accordance with § C of the Accomplishment Instructions of EADS Socata SB 70-154-53.As specified in § B of the Accomplishment Instructions of EADS Socata SB 70-154-53, a single ferry flight with landing gear extended is allowed to reach a maintenance centre where the inspection/modification as required by § 1 of this AD can be accomplished.Note 1: EASA AD 2008-0081-E and EADS Socata Service Bulletin 70-154-53 refers. |\n| Compliance:    | 1. Before next flight after the effective date of this AD.2. At next scheduled inspection after the effective date of this AD, but not later than 31 May 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n|                | This Airworthiness Directive becomes effective on 29 April 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n\n| Background: | It has been discovered that a risk of mechanical interference exists in the movement of the emergency landing gear by-pass selector, due to an insufficient functional gap between a floor panel attachment lug and the landing gear control button. This condition, if not corrected, causes mechanical interference which could result in a situation where, during emergency procedures, the landing gear cannot be extended. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 April 2008","sortOrder":0},{"sectionNumber":"AD/TBM 700/49","sectionType":"part","heading":"AD/TBM 700/49","content":"## AD/TBM 700/49","sortOrder":1},{"sectionNumber":"Emergency Landing Gear By-passSelector I","sectionType":"part","heading":"Emergency Landing Gear By-passSelector Inspection","content":"## Emergency Landing Gear By-pass  \nSelector Inspection","sortOrder":2},{"sectionNumber":"7/2008 TX","sectionType":"part","heading":"7/2008 TX","content":"## 7/2008 TX","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive applies to the explicitly listed serial numbers and requires inspection/modification per the referenced service bulletin. The text does not indicate any alteration or extension of the AD's original applicability beyond those serial numbers; procedures and deadlines are set out and reference EADS Socata SB 70‑154‑53 and EASA AD 2008‑0081‑E for technical detail (Applicability; Requirement; Compliance)."},"complexity_factors":["Technical nature of the corrective work: requires measuring a functional gap and potentially modifying a floor panel per the Accomplishment Instructions of EADS Socata SB 70‑154‑53 (Requirement).","Narrow, serial‑numbered applicability: applies only to listed TBM 700 N serial numbers, so operators must check serial records to determine coverage (Applicability).","Uncertainty test: aircraft where it cannot be determined that the floor panel was not previously removed must undergo inspection, increasing inspection scope for older maintenance records (Requirement §1).","Time‑critical compliance windows: inspections/modifications are required before next flight or by the next scheduled inspection (but not later than 31 May 2009), creating potential operational disruption (Compliance).","Dependence on external documents: the AD delegates procedural detail to EADS Socata SB 70‑154‑53 and references EASA AD 2008‑0081‑E for background and method (Requirement Note 1).","Operational allowance: a single ferry flight with landing gear extended is explicitly permitted to reach a maintenance centre, indicating limited operational flexibility for non‑compliant aircraft (Requirement and SB §B).","Implementation cost and access: modification likely requires a maintenance facility and technician time, producing direct costs and downtime for owners/operators (implicit in Requirement and ferry‑flight allowance).","Recordkeeping and proof burden: operators must be able to show whether the affected panel was removed previously or perform an inspection, creating administrative verification tasks (Requirement §1)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specific EADS Socata TBM 700 N (commercial designation TBM 850) aeroplanes (serial numbers 364, 367 and 370–435) to inspect the gap between the landing‑gear control button and a neighbouring floor‑panel lug and to modify the panel if the gap is insufficient, using EADS Socata Service Bulletin 70‑154‑53. The measure addresses a mechanical interference risk that could stop emergency gear extension; a single ferry flight with gear extended is allowed to reach a maintenance centre."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical interference issue in a limited fleet of aircraft. It has not expanded beyond its initial safety purpose."},"complexity_factors":["Short, single-purpose directive (approximately 300 words)","Only 3 defined applicability criteria (specific serial numbers)","Simple conditional structure: two pathways based on maintenance history (panel removed vs. not removed)","Single cross-reference to EADS Socata Service Bulletin 70-154-53 for technical procedures","Clear compliance deadlines with minimal exceptions (one ferry flight provision)","No nested definitions, no interpretive provisions, no delegated legislation"],"plain_english_summary":"This AD applies to certain EADS Socata TBM 850s and addresses a floor panel that can sit too close to the emergency landing-gear control button. If reinstalled incorrectly after maintenance, the panel can block gear extension in an emergency.\n\nOperators must inspect the gap now if the panel was removed, otherwise modify it by the next inspection (no later than 31 May 2009). One ferry flight with gear down is allowed to reach a repair facility."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection","history":"/api/acts/ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection/history","analysis":"/api/acts/ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection/analysis","conflicts":"/api/acts/ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection/conflicts","importantCases":"/api/acts/ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection/important-cases","documents":"/api/acts/ad-tbm-700-49-emergency-landing-gear-by-pass-selector-inspection/documents"}}