{"id":"F2006B07718","name":"Airworthiness Directives 2004 - Revocation and Remaking - AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series","slug":"f2006b07718","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":333178,"registerId":"commonwealth-F2006B07718-current","compilationNumber":null,"startDate":"2026-04-08","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - AlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series","content":"Airworthiness Directives 2004\n\nI, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety\n\nAuthority, acting under subregulation 39.001 (1) of the Civil\n\nAviation Safety Regulations 1998:\n\n(a) revoke the Airworthiness Directives mentioned in\n\nSchedule 1; and\n\n(b) make, as separate instruments, each Airworthiness\n\nDirective mentioned in Schedule 1 and attached.\n\n![](image.001.png)\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority\n\n20 December 2004\n\nNote: Each attached Airworthiness Directive is being re-made in exactly the\n\nsame form as appears in the latest published edition of the Directive.\n\n  \nSchedule 1 Revocation and Remaking of\n\nAirworthiness Directives\n\nAlliedSignal (Garrett/AiResearch) Turbine Engines - TPE 331 Series\n\nAD Name AD Number\n\nLife Limited Components AD/TPE 331/1 Amdt 5\n\nEngine Parts - Time Limitations AD/TPE 331/2\n\nEngine Parts - Life Limitations AD/TPE 331/3 Amdt 4\n\nPropeller Pitch Control - Modification AD/TPE 331/4\n\nFuel Nozzle and Manifold Assembly - Replacement AD/TPE 331/5\n\nAnti-Icing Shield - Modification AD/TPE 331/6\n\nFuel Control - Modification AD/TPE 331/7\n\nOil Sample and Filter Inspection AD/TPE 331/8\n\nOil Sample and Pressure Oil Filter - Inspection AD/TPE 331/9\n\nHigh Speed Pinion Bearing Assembly - Replacement AD/TPE 331/10\n\nHigh Speed Pinion Bearing Assembly - Replacement AD/TPE 331/11\n\nFuel Control Unit - New Lee Plug Installation AD/TPE 331/12\n\nShort Torsion Shaft Spline Wear - Inspection AD/TPE 331/13\n\nFuel Control Drive - Inspection and Replacement AD/TPE 331/14 Amdt 1\n\nHeated Pneumatic Line - Installation AD/TPE 331/15\n\nTurbine Bearing Oil Inlet Tube - Replacement AD/TPE 331/16\n\nTurbine Bearing Oil Inlet Tube - Replacement AD/TPE 331/17\n\nFuel Control Bracket - Replacement AD/TPE 331/18\n\nTurbine Bearing Support Replacement and Pitch Control Sleeve Pin - Inspection AD/TPE 331/19\n\nReplacement of Reduction Gear Bearing Carrier Bolts, Installation of Lock Plate AD/TPE 331/20\n\nFuel Pump Spline Wear Inspection and/or Replacement AD/TPE 331/21\n\nFuel Control Bracket - Shimming and Increased Torque AD/TPE 331/22\n\nFuel Control and Fuel Pump Mating Splines - Inspection AD/TPE 331/23\n\nPropeller Pitch Control Sleeve - Replacement AD/TPE 331/24\n\nThird Stage Turbine Wheel P/N 3101516/1 - Replacement AD/TPE 331/25\n\nInstallation of Direct Drive Fuel Control AD/TPE 331/26 Amdt 1\n\nFCU Drive Check AD/TPE 331/27\n\nRepl. and/or Life Limitation of P/N 868630-1/-2/-3/-4/-7/-8, P/N 895539-1/-2/- AD/TPE 331/28 Amdt 4\n\nCombustion Section - Plenum Chamber Forward Drain Boss - Inspection AD/TPE 331/29\n\n  \nFuel Pump Drive Shaft AD/TPE 331/30 Amdt 2\n\nFuel Control and Pump Mating Splines AD/TPE 331/31 Amdt 1\n\nRear Turbine Bearing Oil Supply Tube Inspection/Replacement AD/TPE 331/32\n\nSecond Stage Turbine Rotor/Seal Interference AD/TPE 331/33 Amdt 3\n\nBeryllium Spectrometric Oil Analysis AD/TPE 331/34\n\nSecond Stage Stator Assembly AD/TPE 331/35\n\nThird Stage Stator Radiographic Inspection AD/TPE 331/36 Amdt 2\n\nSecond Stage Turbine Rotor Assembly - Cyclic Life Reduction AD/TPE 331/37\n\nSecond Stage Turbine Wheel Assembly AD/TPE 331/38\n\nEngine Parts - Life Limitation AD/TPE 331/39\n\nScavenge Oil Pump Assembly AD/TPE 331/40\n\nThird Stage Turbine Stators AD/TPE 331/41 Amdt 2\n\nTorque Sensor AD/TPE 331/42 Amdt 1\n\nFuel Manifold Assembly P/N 3102469-2 AD/TPE 331/43 Amdt 2\n\nPitch Control Gasket AD/TPE 331/44\n\nThird Stage Stator Assembly AD/TPE 331/45\n\nLife Limited Components, -12 Series Engines AD/TPE 331/46\n\nThird Stage Turbine Stator Assembly AD/TPE 331/47\n\nFuel Control Unit Drive Shaft Spline Wear AD/TPE 331/48\n\nFliteline Maintenance AD/TPE 331/49\n\nFirst Stage Compressor Impeller AD/TPE 331/50 Amdt 1\n\nFuel Manifold Assemblies AD/TPE 331/51 Amdt 1\n\nPT2 Sensor Icing AD/TPE 331/52\n\nThird Stage Replacement AD/TPE 331/53\n\nFuel Manifold AD/TPE 331/54\n\nOil Analysis Program - CANCELLED AD/TPE 331/55 Amdt 3\n\nSecond Stage Turbine Stator AD/TPE 331/56\n\nReduction Gear and Shaft Assembly - CANCELLED AD/TPE 331/57 Amdt 1\n\nReduction Gear And Shaft Assembly - CANCELLED AD/TPE 331/58 Amdt 2\n\nElectronic Engine Controls AD/TPE 331/59\n\nCycle Life Counting - Special Use Operations AD/TPE 331/60\n\n1st Stage Turbine Disk AD/TPE 331/61\n\nReduction Gear and Shaft Assembly AD/TPE 331/62","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The scope remains exactly as intended — this is a procedural remaking of existing airworthiness directives under the Civil Aviation Safety Regulations 1998. The explicit note confirms no substantive changes to the directives themselves."},"complexity_factors":["Single, clear purpose: revocation and remaking of existing instruments","No substantive legal text in the instrument itself — all technical content is attached as separate documents (the actual ADs)","Only one operative provision with two straightforward sub-paragraphs (a) and (b)","Schedule 1 is purely a table of contents listing 62 ADs with their numbers and titles","No defined terms, conditional logic, or cross-references within the instrument text","Relies entirely on external documents (the attached ADs) for technical complexity"],"plain_english_summary":"This instrument revokes and immediately remakes 62 existing Airworthiness Directives for AlliedSignal (Garrett/AiResearch) TPE 331 turbine engines, preserving each directive “in exactly the same form.” It affects aircraft operators, maintenance organisations, and aircrew/engineers who must comply with these legally binding safety orders. This is procedural housekeeping—not new safety requirements—with two prior directives cancelled."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not change substantive scope or requirements. It revokes listed Airworthiness Directives and re-issues them in identical form to maintain their legal status; operator obligations and affected population remain the same."},"complexity_factors":["Instrument is primarily administrative: revocation and re-making of existing directives under subregulation 39.001(1).","Large schedule listing many individual ADs (dozens) increases bookkeeping and reference complexity for operators and regulators.","No substantive change to technical requirements (each AD re-made in identical form), which reduces policy complexity but preserves operational compliance obligations.","Compliance burden remains with aircraft owners, operators and maintenance organisations who must keep working to the same directives; enforcement discretion lies with CASA.","Risk of implementation friction: ensuring all separate re-made instruments are published, distributed and integrated into maintenance systems."],"plain_english_summary":"This instrument revokes a listed set of airworthiness directives for AlliedSignal (Garrett/AiResearch) TPE331-series turbine engines and re-issues each as a separate instrument in the same form as the latest published editions. It is made by a CASA delegate under subregulation 39.001(1) to preserve the directives' legal standing.\n\nIt affects aircraft owners, operators, maintenance organisations and engineers using TPE331 engines — they must continue to comply with the same inspection and maintenance obligations, and bear any associated costs and operational consequences."}},"importantCases":[],"_links":{"self":"/api/acts/f2006b07718","history":"/api/acts/f2006b07718/history","analysis":"/api/acts/f2006b07718/analysis","conflicts":"/api/acts/f2006b07718/conflicts","importantCases":"/api/acts/f2006b07718/important-cases","documents":"/api/acts/f2006b07718/documents"}}