{"id":"F2009L03423","name":"AD/TPE 331/12 - Fuel Control Unit - New Lee Plug Installation - CANCELLED","slug":"ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141009,"registerId":"commonwealth-F2009L03423-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal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 331/12 | Fuel Control Unit - New Lee Plug 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. 73-0003 prior to fitment to an engine after August 1972. 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 331/12","sectionType":"part","heading":"AD/TPE 331/12","content":"## AD/TPE 331/12","sortOrder":1},{"sectionNumber":"Fuel Control Unit - New Lee Plug Install","sectionType":"part","heading":"Fuel Control Unit - New Lee Plug Installation","content":"## Fuel Control Unit - New Lee Plug 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":2109},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs exactly one function: cancelling a previous airworthiness directive. Its scope is strictly limited to removing specific regulatory requirements for TPE 331 series engines and has not expanded beyond this single, explicit purpose."},"complexity_factors":["Single operative provision (cancellation of previous instrument)","No defined terms or interpretation section","No conditional logic, exceptions, or legislative cross-references","Straightforward repeal with no substitutive provisions"],"plain_english_summary":"This notice cancels AD/TPE 331/12, removing the prior mandatory requirement for owners/operators of AlliedSignal (Garrett/AiResearch) TPE 331 series turbine engines to install “Lee plugs” in the fuel control unit per Airesearch SB No. 73‑0003 before fitting engines manufactured after August 1972. Effective 24 September 2009, CASA concluded the directive is no longer necessary, lifting that regulatory maintenance burden while retaining overall safety oversight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled","history":"/api/acts/ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled/history","analysis":"/api/acts/ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-12-fuel-control-unit-new-lee-plug-installation-cancelled/documents"}}