{"id":"F2009L03413","name":"AD/TPE 331/32 - Rear Turbine Bearing Oil Supply Tube Inspection/Replacement - CANCELLED","slug":"ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140991,"registerId":"commonwealth-F2009L03413-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal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 331/32 | Rear Turbine Bearing Oil SupplyTube Inspection/Replacement | 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 British Aerospace Alert SB No. 71-A-JM 7418 Parts A and B; and Garrett SB No. 79-0013, at intervals not exceeding 400 hours time in service until modified. 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 331/32","sectionType":"part","heading":"AD/TPE 331/32","content":"## AD/TPE 331/32","sortOrder":1},{"sectionNumber":"Rear Turbine Bearing Oil SupplyTube Insp","sectionType":"part","heading":"Rear Turbine Bearing Oil SupplyTube Inspection/Replacement","content":"## Rear Turbine Bearing Oil Supply  \nTube Inspection/Replacement","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":2429},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument represents a termination rather than an expansion. It simply cancels the previous Airworthiness Directive in its entirety, removing all obligations rather than adding new requirements or expanding regulatory reach."},"complexity_factors":["Single operative provision (cancellation of previous requirements)","No defined terms or interpretive sections","No conditional logic, exceptions, or nested provisions","No cross-references to other legislation (only historical reference to the service bulletins previously required)","Extremely short length with plain language ('CANCELLED')"],"plain_english_summary":"This document cancels a previous mandatory safety instruction (called an **Airworthiness Directive** or **AD**) issued by the aviation regulator.\n\n**What it used to require:** Owners of AlliedSignal (Garrett) TPE 331 turbine engines previously had to inspect or replace the **rear turbine bearing oil supply tube** every 400 hours of flight time, following specific manufacturer service bulletins, unless the engine was modified.\n\n**What it does now:** The Civil Aviation Safety Authority has cancelled this requirement effective 24 September 2009. The repetitive inspection is no longer considered necessary for safety.\n\n**Who this affects:** Aircraft owners, operators, and maintenance engineers working with planes powered by AlliedSignal (Garrett/AiResearch) TPE 331 series turbine engines.\n\n**Why this matters:** This removes a recurring maintenance burden and associated costs (labour and downtime) for aircraft operators, while maintaining current safety standards."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled","history":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled/history","analysis":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement-cancelled/documents"}}