{"id":"F2009L03427","name":"AD/TPE 331/6 - Anti-Icing Shield - Modification - CANCELLED","slug":"ad-tpe-331-6-anti-icing-shield-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141021,"registerId":"commonwealth-F2009L03427-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal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 331/6 | Anti-Icing Shield - Modification | 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 SB No. 10. The AD was issued in 1967 and compliance was required forthwith. 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 331/6","sectionType":"part","heading":"AD/TPE 331/6","content":"## AD/TPE 331/6","sortOrder":1},{"sectionNumber":"Anti-Icing Shield - Modification","sectionType":"part","heading":"Anti-Icing Shield - Modification","content":"## Anti-Icing Shield - Modification","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":2052},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the regulatory requirement entirely rather than expanding it. It represents a straightforward cancellation of a 1967 directive that is no longer required for aviation safety."},"complexity_factors":["Single operative provision (cancellation)","No defined terms section","No conditional logic or exceptions","Straightforward revocation of prior instrument","Minimal cross-referencing (only cites the cancelled AD and original 1967 service bulletin)"],"plain_english_summary":"This document cancels an old aircraft safety rule that required modifications to certain aircraft engines.\n\n**What it cancelled:**\n* An Airworthiness Directive (AD) originally issued in 1967\n* The old rule required owners of AlliedSignal (Garrett/AiResearch) TPE 331 series turbine engines to modify their **anti-icing shields** (parts that prevent ice buildup on the engine)\n* Compliance was required immediately (\"forthwith\") when originally issued\n\n**What this means:**\nAs of 24 September 2009, aircraft operators no longer need to comply with the modification requirement specified in the original 1967 directive. The Civil Aviation Safety Authority (CASA) determined this safety action is no longer necessary."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-6-anti-icing-shield-modification-cancelled","history":"/api/acts/ad-tpe-331-6-anti-icing-shield-modification-cancelled/history","analysis":"/api/acts/ad-tpe-331-6-anti-icing-shield-modification-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-6-anti-icing-shield-modification-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-6-anti-icing-shield-modification-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-6-anti-icing-shield-modification-cancelled/documents"}}