{"id":"F2009L03421","name":"AD/TPE 331/15 - Heated Pneumatic Line - Installation - CANCELLED","slug":"ad-tpe-331-15-heated-pneumatic-line-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141001,"registerId":"commonwealth-F2009L03421-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series","content":"### AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series\n\n| AD/TPE 331/15 | Heated Pneumatic Line - Installation | 10/2009 |\n| ------------- | ------------------------------------ | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 24 September 2009.                                                                                                                    |\n| Background:  | This unique Australian AD specified action in accordance with Airesearch SBNo. 73-0023 Rev 1 within 100 hours after April 1974. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n14 August 2009","sortOrder":0},{"sectionNumber":"AD/TPE 331/15","sectionType":"part","heading":"AD/TPE 331/15","content":"## AD/TPE 331/15","sortOrder":1},{"sectionNumber":"Heated Pneumatic Line - Installation","sectionType":"part","heading":"Heated Pneumatic Line - Installation","content":"## Heated Pneumatic Line - Installation","sortOrder":2},{"sectionNumber":"10/2009","sectionType":"part","heading":"10/2009","content":"## 10/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2032},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly one function: cancelling Airworthiness Directive TPE 331/15. It does not expand beyond its stated purpose of revocation."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or nested provisions","Minimal cross-referencing (only historical context)","Extremely short length (effectively one sentence of operative text)"],"plain_english_summary":"**What this document does:**\n\nThis officially cancels a previous aircraft safety rule (called an **Airworthiness Directive** or **AD**) that applied to certain AlliedSignal (Garrett/AiResearch) TPE 331 turbine engines.\n\n**What was the old rule?**\n\nThe previous AD required aircraft operators to perform specific maintenance actions on **heated pneumatic lines** (parts of the engine's air system) within 100 hours of April 1974, following instructions in a manufacturer service bulletin (Airesearch SBNo. 73-0023 Rev 1).\n\n**What happens now?**\n\nAs of **24 September 2009**, this safety requirement is no longer legally binding. Owners and operators of these engines no longer need to comply with the 1974 directive, as the Civil Aviation Safety Authority has determined it is no longer necessary for safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-15-heated-pneumatic-line-installation-cancelled","history":"/api/acts/ad-tpe-331-15-heated-pneumatic-line-installation-cancelled/history","analysis":"/api/acts/ad-tpe-331-15-heated-pneumatic-line-installation-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-15-heated-pneumatic-line-installation-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-15-heated-pneumatic-line-installation-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-15-heated-pneumatic-line-installation-cancelled/documents"}}