{"id":"F2009L03426","name":"AD/TPE 331/7 - Fuel Control - Modification - CANCELLED","slug":"ad-tpe-331-7-fuel-control-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141018,"registerId":"commonwealth-F2009L03426-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AlliedSignal (Garrett/AiResearch) Turbin","sectionType":"division","heading":"AlliedSignal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 331/7 | Fuel Control - 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 SBNo. 25A, B, C or D. 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 331/7","sectionType":"part","heading":"AD/TPE 331/7","content":"## AD/TPE 331/7","sortOrder":1},{"sectionNumber":"Fuel Control - Modification","sectionType":"part","heading":"Fuel Control - Modification","content":"## Fuel Control - 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":2486},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the legislation entirely rather than expanding its scope. The original 1967 AD imposed mandatory fuel control modifications; this 2009 version eliminates all requirements, reducing the scope to nil rather than growing beyond the original purpose."},"complexity_factors":["Single operative provision consisting of one word: 'CANCELLED'","No defined terms or interpretation section","No conditional logic, exceptions, or procedural requirements","Document length under 100 words of substantive content","No cross-references to other legislative instruments (only historical reference to the cancelled 1967 AD)"],"plain_english_summary":"**What this does:** This document officially cancels a 42-year-old aircraft safety rule that required specific fuel control modifications on certain turbine engines.\n\n**Who it affects:** Owners and operators of aircraft powered by **AlliedSignal (formerly Garrett/AiResearch) TPE 331 series turbine engines** — commonly used in regional airliners, agricultural aircraft, and military planes.\n\n**What changed:** The original 1967 rule mandated urgent modifications to fuel controls in accordance with manufacturer service bulletins (SBNo. 25A, B, C or D). As of **24 September 2009**, this requirement no longer applies. The Civil Aviation Safety Authority determined the rule was no longer needed for airworthiness.\n\n**Why it matters:** This removes a longstanding maintenance obligation, potentially saving operators time and money by eliminating a mandatory modification that had been required \"forthwith\" (immediately) since 1967."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-7-fuel-control-modification-cancelled","history":"/api/acts/ad-tpe-331-7-fuel-control-modification-cancelled/history","analysis":"/api/acts/ad-tpe-331-7-fuel-control-modification-cancelled/analysis","conflicts":"/api/acts/ad-tpe-331-7-fuel-control-modification-cancelled/conflicts","importantCases":"/api/acts/ad-tpe-331-7-fuel-control-modification-cancelled/important-cases","documents":"/api/acts/ad-tpe-331-7-fuel-control-modification-cancelled/documents"}}