{"id":"F2006L02981","name":"AD/CF6/61 - Thrust Reverser Actuation System","slug":"ad-cf6-61-thrust-reverser-actuation-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":60257,"registerId":"commonwealth-F2006L02981-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"General Electric Turbine Engines - CF6 S","sectionType":"division","heading":"General Electric Turbine Engines - CF6 Series","content":"### General Electric Turbine Engines - CF6 Series\n\n| AD/CF6/61 | Thrust Reverser Actuation System | 10/2006 |\n| --------- | -------------------------------- | ------- |\n\n| Applicability: | General Electric Company (GE) CF6-80E1 series turbofan engines.Note 1: These engines are installed on, but not limited to, Airbus Industrie A330 series aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                      |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Perform a check of the holding torque of the TRAS locks.Based on the results of the holding torque check, perform a visual inspection of the TRAS lock flexible drive shafts if necessary.Replace any damaged flexible drive shafts or locks.Note 2: Information on performing a check of the holding torque of the TRAS locks, and a visual inspection of the TRAS lock flexible drive shafts, can be found in the Airbus A330 Aircraft Maintenance Manual, Task 72-00-00-200-850.Note 3: FAA AD 2005-22-12 Amdt 39-14356 dated 27 October 2005 refers. |\n| Compliance:    | Within 10 flight cycles after all aborted takeoffs in which the thrust reverser was deployed after the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                        |\n|                | This Airworthiness Directive becomes effective on 28 September 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |\n| Background:    | This AD results from reports of operators finding several damaged thrust reverser actuation system (TRAS) lock flexible drive shafts during inspections and checks of the drive shafts. The issuing of this AD is to prevent inadvertent in-flight deployment of the thrust reverser, which can result in loss of control of the aeroplane.                                                                                                                                                                                                              |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2006","sortOrder":0},{"sectionNumber":"AD/CF6/61","sectionType":"part","heading":"AD/CF6/61","content":"## AD/CF6/61","sortOrder":1},{"sectionNumber":"Thrust Reverser Actuation System","sectionType":"part","heading":"Thrust Reverser Actuation System","content":"## Thrust Reverser Actuation System","sortOrder":2},{"sectionNumber":"10/2006","sectionType":"part","heading":"10/2006","content":"## 10/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in a specific engine series. The scope remains precisely focused on preventing in-flight thrust reverser deployment through mandatory inspections, consistent with the standard purpose of Airworthiness Directives."},"complexity_factors":["Very short document (approximately 250 words)","Only 1 defined term implicitly referenced (TRAS - Thrust Reverser Actuation System)","Single, clear compliance trigger (aborted takeoffs with thrust reverser deployment)","Straightforward conditional logic: if check fails → then inspect → then replace if damaged","No cross-references to other legislation beyond a single FAA AD citation for background","Single applicability criterion (specific engine series)"],"plain_english_summary":"This AD requires operators of GE CF6-80E1 engines (notably on A330s) to perform mandatory post‑aborted‑takeoff checks of the thrust reverser actuation system and to inspect and replace damaged flexible drive shafts or locks as found. It targets a risk of unintended mid‑flight thrust reverser deployment that could cause loss of control. Effective 28 September 2006."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope aligns with the AD's stated intent: it applies to GE CF6-80E1 engines and imposes a targeted inspection and replacement obligation triggered by aborted takeoffs with thrust reverser deployment. The AD does not broaden applicability beyond the engine series noted and relies on existing AMM procedures for execution."},"complexity_factors":["Safety-critical operational requirement to prevent in‑flight thrust reverser deployment (Background).","Trigger-based inspection: applies only after aborted takeoffs where the thrust reverser was deployed (Compliance).","Short compliance window: inspections required within 10 flight cycles (Compliance).","Actionable work: holding-torque check, possible visual inspection, and replacement of damaged parts (Requirement).","Procedural detail is external: the AD refers to the Airbus A330 Aircraft Maintenance Manual for how to perform checks (Requirement, Note 2).","Cross-reference to FAA AD 2005-22-12 for related authority and context (Requirement, Note 3).","Narrow applicability: GE CF6-80E1 series engines, noted as installed on A330s but not limited to that type (Applicability).","Compliance and cost burden fall on aircraft operators and maintenance providers (implied by Requirement and Compliance)."],"plain_english_summary":"This Airworthiness Directive requires operators of GE CF6-80E1 engines to check the holding torque of thrust reverser actuation system (TRAS) locks and, if necessary, visually inspect and replace damaged flexible drive shafts or locks. Operators must complete checks within 10 flight cycles after any aborted takeoff in which the thrust reverser deployed. Airlines pay for inspections and any replacements; maintenance staff must follow the Airbus A330 Aircraft Maintenance Manual procedures cited in the AD. The stated aim is to prevent inadvertent in‑flight deployment of the thrust reverser."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cf6-61-thrust-reverser-actuation-system","history":"/api/acts/ad-cf6-61-thrust-reverser-actuation-system/history","analysis":"/api/acts/ad-cf6-61-thrust-reverser-actuation-system/analysis","conflicts":"/api/acts/ad-cf6-61-thrust-reverser-actuation-system/conflicts","importantCases":"/api/acts/ad-cf6-61-thrust-reverser-actuation-system/important-cases","documents":"/api/acts/ad-cf6-61-thrust-reverser-actuation-system/documents"}}