{"id":"F2006B07431","name":"AD/TPE 331/22 - Fuel Control Bracket - Shimming and Increased Torque","slug":"ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49708,"registerId":"commonwealth-F2006B07431-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TPE 331/22 - Fuel Control Bracket - Shimming and Increased Torque","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series\n\n \n\nAD/TPE 331/22 Fuel Control Bracket - Shimming and\n\nIncreased Torque\n\n\n3/86\n\n \n\nApplicability: TPE-331-1-100B, -E, -F, -J, -L and -Z. TPE-331-1-151A, -G, and -K. TPE-331-2- 201A. TPE-331-5-252M. TPE-331-6-252M. TPE-331-2UA-203D. TPE-331-3U-\n\n303G. TPE-331-2UW-303G. TSE-331-3U-303N.\n\n \n\nDocument: AiResearch SB TPE TSE 331-73-0036, Rev. 2; or AD/AIR-T/27A.\n\nCompliance: Within 100 hours time in service after 30 September 1977.\n\n \n\nNote: Engines complying with the preceding issue of this Directive satisfy compliance with this issue.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1461},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope focused solely on the fuel control bracket shimming and torque requirements for the specified TPE 331 engine variants. The note regarding preceding issue compliance does not expand scope but clarifies grandfathering for already-compliant engines."},"complexity_factors":["Single, specific mechanical maintenance action required","Clear list of affected engine models with no conditional exclusions","Simple compliance deadline (100 hours time in service)","No defined terms, cross-references to other legislation, or nested exceptions","Document reference points to single service bulletin (AiResearch SB TPE TSE 331-73-0036)"],"plain_english_summary":"**What it does:** This Airworthiness Directive requires owners and operators of specific AlliedSignal (Garrett/AiResearch) TPE 331 turbine engines to perform maintenance on the fuel control bracket. Specifically, they must add shims (thin pieces of material to fill gaps) and apply increased torque (tightening force) to the bracket assembly.\n\n**Who it affects:** Anyone operating aircraft with these specific engine models: TPE-331-1-100B, -E, -F, -J, -L, -Z; TPE-331-1-151A, -G, -K; TPE-331-2-201A; TPE-331-5-252M; TPE-331-6-252M; TPE-331-2UA-203D; TPE-331-3U-303G; TPE-331-2UW-303G; and TSE-331-3U-303N.\n\n**Why it matters:** The directive addresses a safety defect in the fuel control bracket mounting. Without this fix, the bracket could fail, potentially causing fuel leaks, engine failure, or fire. Compliance is mandatory within 100 hours of engine operation after the specified date."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque","history":"/api/acts/ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque/history","analysis":"/api/acts/ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque/analysis","conflicts":"/api/acts/ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque/conflicts","importantCases":"/api/acts/ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque/important-cases","documents":"/api/acts/ad-tpe-331-22-fuel-control-bracket-shimming-and-increased-torque/documents"}}