{"id":"F2006B08037","name":"Airworthiness Directives 2004 - Revocation and Remaking - Teledyne Continental Motors Piston Engines","slug":"airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115110,"registerId":"commonwealth-F2006B08037-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Airworthiness Directives 2004 - Revocation and Remaking - Teledyne Continental Motors Piston Engines","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\nTeledyne Continental Motors Piston Engines\n\nAD Name AD Number\n\nExhaust Valves - Replacement - CANCELLED AD/CON/1 Amdt 1\n\nOil Dip Stick - Retention - CANCELLED AD/CON/2\n\nPiston Pin - Replacement - CANCELLED AD/CON/3\n\nCylinder Head - Inspection - CANCELLED AD/CON/4 Amdt 1\n\nValve Lifter - Inspection and Replacement - CANCELLED AD/CON/5\n\nCrankshaft Counterweight Pin Retaining Plate - Inspection and Modification - AD/CON/6\n\nCylinder Assembly - Inspection and Replacement - CANCELLED AD/CON/7 Amdt 1\n\nRocker Arm Shaft Bolts - Retention - CANCELLED AD/CON/8\n\nInjector Cooling Shroud - Inspection and Modification - CANCELLED AD/CON/9\n\nSuperseded AD/CON/10\n\nAdjustable Orifice Fuel Pump - Modification - CANCELLED AD/CON/11 Amdt 3\n\nFuel Injection Pump - Inspection for Leaks - CANCELLED AD/CON/12\n\nMandatory Replacement of Parts During Overhaul - CANCELLED AD/CON/13 Amdt 7\n\nOil Pump Gears - Back Lash Check and Replacement - CANCELLED AD/CON/14 Amdt 1\n\nCylinder Assemblies - Inspection - CANCELLED AD/CON/15 Amdt 1\n\nOil Filter Adapter and Base Plate - Inspection and Modification - CANCELLED AD/CON/16 Amdt 1\n\nMagneto Rubber Drive Coupling - Inspection - CANCELLED AD/CON/17\n\nScavenge Pump Drive Gear - Replacement - CANCELLED AD/CON/18\n\nExhaust Valves - Retirement of Non-Nimonic and/or Non-Nickel Plated Valves - AD/CON/19 Amdt 2\n\nCrankshaft Counterweight Bushes - Replacement - CANCELLED AD/CON/20 Amdt 1\n\nCarburettor Bowl Drain Plug - Inspection - CANCELLED AD/CON/21\n\nValve Guides - Inspection - CANCELLED AD/CON/22\n\nCrankshaft Main Bearing - Clearance - CANCELLED AD/CON/23\n\nRunning-in and Testing of Engines - CANCELLED AD/CON/24 Amdt 1\n\nCylinder Assembly - Inspection and Replacement - CANCELLED AD/CON/25\n\nFuel Nozzle Lines - Routeing, Support and Inspection - CANCELLED AD/CON/26\n\nTurbocharger Oil Inlet Adapter - Replacement - CANCELLED AD/CON/27\n\nOil Filter Adaptor Modification and Filter Change - CANCELLED AD/CON/28 Amdt 1\n\nExhaust System - Inspection - CANCELLED AD/CON/29 Amdt 1\n\n  \nOil Filter Adaptor Modification and Filter Change - CANCELLED AD/CON/30\n\nExhaust Rocker Arm - Inspection - CANCELLED AD/CON/31 Amdt 2\n\nIgnition Timing Retardation - CANCELLED AD/CON/32 Amdt 1\n\nFuel Injection Pump Relief Valve Diaphragm - Inspection - CANCELLED AD/CON/33\n\nCrankcase - Inspection and Replacement - CANCELLED AD/CON/34 Amdt 2\n\nInduction Elbow - Inspection - CANCELLED AD/CON/35 Amdt 1\n\nOil Pressure Relief Valve Plunger and Screw - Replacement - CANCELLED AD/CON/36 Amdt 1\n\nCylinder Head - Inspection - CANCELLED AD/CON/37 Amdt 1\n\nCrankshaft Front Oil Seal Retainer - Fitment - CANCELLED AD/CON/38 Amdt 1\n\nFuel Pump and Screen - Inspection - CANCELLED AD/CON/39 Amdt 1\n\nOil Pump Drive - Inspection - CANCELLED AD/CON/40 Amdt 2\n\nCrankshaft Inspection - CANCELLED AD/CON/41 Amdt 1\n\nOil Filter Adapter P/N 641576 - Flange Inspection - CANCELLED AD/CON/42\n\nFuel Pressure Regulator - Inspection - CANCELLED AD/CON/43\n\nFuel Pump Assembly - CANCELLED AD/CON/44 Amdt 1\n\nCamshaft Oil Transfer Holes AD/CON/45 Amdt 3\n\nValve Guide Incompatibility - Cylinder Assemblies P/N 646680 - CANCELLED AD/CON/46\n\nCylinder Barrel Cracking - CANCELLED AD/CON/47 Amdt 4\n\nCylinder Thru Bolt Torque - CANCELLED AD/CON/48\n\nRotary Fuel Pump P/N 643367A2 AD/CON/49 Amdt 1\n\nStarter Adaptor Shaft Gear P/No 649343 - CANCELLED AD/CON/50\n\nTurbocharger Check Valve and Hose Clamps AD/CON/51\n\nCrankshaft Bearing Integrity and Piston Pin Replacement AD/CON/52 Amdt 1\n\nStarter Adaptor Shafts AD/CON/53 Amdt 1\n\nCylinder Base Stud/Through Bolt Torque - CANCELLED AD/CON/54\n\nOil Filters - CANCELLED AD/CON/55\n\nNumber Two Crankcase Main Bearing Integrity AD/CON/56 Amdt 1\n\nOil Scavenge Pump Gears AD/CON/57 Amdt 1\n\nChallenger Engineering Chrome Plated Cylinder Barrels AD/CON/58\n\nWeld Repair Crankcase Inspection - CANCELLED AD/CON/59\n\nFuel Injection Supply Lines AD/CON/60\n\nCrankshaft Removal/Inspection AD/CON/61\n\nMandatory Replacement of Parts - CANCELLED AD/CON/62\n\nConnecting Rods AD/CON/63 Amdt 1\n\nInduction Elbow AD/CON/64\n\nFuel Pump Screen AD/CON/65\n\n  \nFuel Pump Drive Coupling AD/CON/66 Amdt 2\n\nValve Retainer Key AD/CON/67\n\nIncorrect Oil Pick-Up Tube AD/CON/68\n\nIncorrect Connecting Rods AD/CON/69\n\nCarburettor Air Intake Housing AD/CON/70\n\nGTSIO-520 Starter Adaptor Shafts AD/CON/71 Amdt 2\n\nEngine Mount Bracket AD/CON/72\n\nUnapproved Camshaft Repairs AD/CON/73\n\nTurbocharger Oil Output Check Valve AD/CON/74\n\nMagneto Timing AD/CON/75\n\nSuperior Pistons AD/CON/76\n\nPiston Pin Plug Wear AD/CON/77\n\nRoller Rockers AD/CON/78\n\nCrankshaft Inspection AD/CON/79 Amdt 2\n\nCrankshaft Material Inspection AD/CON/80 Amdt 3\n\nUnison Industries (Slick) Magnetos AD/CON/81 Amdt 1\n\nCrankshaft Replacement and Ultrasonic Inspection AD/CON/82","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument performs a pure administrative restructure. The scope remains identical — the same 82 Airworthiness Directives continue to apply to the same Teledyne Continental Motors piston engines. The note explicitly confirms no substantive change: 'Each attached Airworthiness Directive is being re-made in exactly the same form as appears in the latest published edition of the Directive.' Some directives marked 'CANCELLED' are being removed from the active set, but this represents normal regulatory maintenance rather than scope expansion."},"complexity_factors":["Simple, single-purpose instrument with clear structure (revocation + remaking)","No defined terms section — relies on external aviation terminology","No conditional logic or nested exceptions in the instrument itself","Complexity lies in the 82 attached directives (not reproduced here), which contain detailed technical specifications","Cross-references only to the enabling regulation (Civil Aviation Safety Regulations 1998, subregulation 39.001(1))","Straightforward tabular schedule listing directives by name and number","Note clarifies intent, reducing interpretive ambiguity"],"plain_english_summary":"CASA revokes 82 existing Airworthiness Directives for Teledyne Continental Motors piston engines and remakes them as separate, standalone legal instruments. \n\nThis is an administrative re‑organisation that doesn't change the substance of the safety requirements; it affects aircraft owners, operators and maintenance engineers who must continue to comply with the same mandatory inspection and repair obligations, now issued as individual instruments for clearer legal form."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument does not change substantive obligations. It revokes listed Airworthiness Directives and re‑issues each in identical form (per the instrument's note), so affected parties must continue the same mandatory actions. The change is administrative: legal form and instrument status are updated while technical requirements and who bears compliance costs remain the same."},"complexity_factors":["Administrative rather than substantive change — directives are re-made in identical form, reducing legal novelty but requiring tracking of instrument status.","Large number of listed ADs (many amended or marked CANCELLED), which raises navigational and record-keeping complexity for operators and maintainers.","Technical subject matter (airworthiness of piston engines) requires specialist maintenance and compliance actions by industry, not generalist interpretation.","References to amendments and cancellations increase the effort needed to reconcile historical obligations with current instruments.","Delegated decision-making under subregulation 39.001(1) centralises authority in CASA’s delegate, creating a single administrative point of discretion.","Potential for administrative burden on operators from changed legal form (paperwork, indexing, and compliance verification) despite unchanged substantive requirements."],"plain_english_summary":"This instrument revokes a listed set of Airworthiness Directives for Teledyne Continental Motors piston engines and remakes each one as a separate, identical legal instrument under the Civil Aviation Safety Regulations. It is an administrative re-issuance made by a CASA delegate. It affects aircraft owners, operators and maintenance organisations who must continue complying with the same mandatory safety actions and who bear the compliance and record-keeping costs; the delegate remains the decision-maker."}},"importantCases":[],"_links":{"self":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines","history":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines/history","analysis":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines/analysis","conflicts":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines/conflicts","importantCases":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines/important-cases","documents":"/api/acts/airworthiness-directives-2004-revocation-and-remaking-teledyne-continental-motors-piston-engines/documents"}}