{"id":"F2009L03415","name":"AD/TPE 331/27 - FCU Drive Check - CANCELLED","slug":"ad-tpe-331-27-fcu-drive-check-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":140993,"registerId":"commonwealth-F2009L03415-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal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 331/27 | FCU Drive Check | 10/2009 |\n| ------------- | --------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                            |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 24 September 2009.                                                                                                                                            |\n| Background:  | This unique Australian AD specified periodic inspection in accordance with Airesearch SB No. 72-0095 until torquemeter body P/N 3101726-2 is installed. 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 331/27","sectionType":"part","heading":"AD/TPE 331/27","content":"## AD/TPE 331/27","sortOrder":1},{"sectionNumber":"FCU Drive Check","sectionType":"part","heading":"FCU Drive Check","content":"## FCU Drive Check","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":1972},"content_quality":"ok","complexity_score":1,"rejection_reason":"","scope_assessment":{"changed":false,"description":"This instrument formally terminates the original AD rather than expanding its scope. The original AD was always intended to be temporary (applying only until a specific part was installed), and this cancellation represents the natural conclusion of that regulatory lifecycle, not scope creep."},"complexity_factors":["Single operative provision (cancellation of previous requirements)","No defined terms or interpretation section","Document length is under 150 words","Only references one previous document (the cancelled AD) and one manufacturer service bulletin","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"**This document cancels a previous aircraft safety rule.**\n\nThe Civil Aviation Safety Authority has ended a requirement (Airworthiness Directive AD/TPE 331/27) that previously forced owners of certain aircraft engines to perform regular inspections.\n\n**Who it affects:**\n- Owners and operators of aircraft with AlliedSignal (Garrett/AiResearch) TPE 331 series turbine engines\n\n**What it does:**\n- Cancels the requirement to periodically inspect the Fuel Control Unit (FCU) Drive according to manufacturer Service Bulletin No. 72-0095\n- The cancellation took effect on **24 September 2009**\n\n**Why it matters:**\nThe original rule was only temporary—it applied only until a specific replacement part (torquemeter body part number 3101726-2) was installed on the engine. The Authority cancelled the rule because it was no longer needed, presumably because the fleet had been modified or the safety risk had been resolved."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-27-fcu-drive-check-cancelled","history":"/api/acts/ad-tpe-331-27-fcu-drive-check-cancelled/history","analysis":"/api/acts/ad-tpe-331-27-fcu-drive-check-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-27-fcu-drive-check-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-27-fcu-drive-check-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-27-fcu-drive-check-cancelled/documents"}}