{"id":"F2006B06022","name":"AD/PA-46/15 - Powerplant Cooling","slug":"ad-pa-46-15-powerplant-cooling","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114420,"registerId":"commonwealth-F2006B06022-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-46/15 - Powerplant Cooling","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nPiper PA-46 (Malibu) Series Aeroplanes\n\nAD/PA-46/15 Powerplant Cooling 2/89 DM\n\nApplicability: PA 46-310P (MALIBU).\n\nSerial Numbers: 46-8408002 through 46-8408035, 46-8408037 through 46-8408046,\n\n46-8408048 through 46-8608002, 46-8608004 through 46-8608067, 46-08001\n\nthrough 4608076, 46-08078 through 46-08129.\n\nRequirement: Embody powerplant cooling improvement kit Piper Part No 765-365 in accordance with Piper SB No 892.\n\nNote: Teledyne Continental SB M88-12 refers.\n\nCompliance: Within 50 hours time in service after 20 January 1989.\n\nBackground: Incidents have occurred that indicate excessive operating temperatures have resulted in engine damage. Recent Piper Aircraft Co. tests confirmed that oil and cylinder head normal operating temperatures where being exceeded due to insufficient air flow through the engine compartment which, if not corrected, can result in catastrophic failure of the engine due to excessive heat.\n\nThis Directive is issued to prevent catastrophic engine failure due to insufficient cooling air.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific engineering defect in a specific aircraft model. It has not expanded beyond its original purpose of preventing engine overheating in the PA-46-310P Malibu."},"complexity_factors":["Single, unambiguous requirement: install one specific part kit","No defined terms section — all terminology is standard aviation language","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple conditional logic: if your aircraft serial number is on the list, you must comply","Clear, single compliance deadline with no exceptions or alternative methods of compliance","Document length: approximately 200 words"],"plain_english_summary":"This CASA Airworthiness Directive legally requires owners/operators of certain Piper PA-46-310P Malibu aircraft (about 150–160 affected) to install Piper Part No. 765-365 cooling improvement kits to correct inadequate engine airflow that causes overheating.  \n\nThe fix was mandated within 50 flight hours after 20 January 1989 because overheating was shown to risk catastrophic engine failure in flight."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text prescribes a specific corrective modification for identified PA‑46‑310P serial numbers and sets a compliance deadline. The instrument itself does not indicate any change from a prior scope or intent; there is no textual evidence here that the range of affected aircraft or the remedy differs from an earlier requirement."},"complexity_factors":["Narrow applicability by explicit serial number ranges (Applicability) — reduces scope ambiguity but requires serial-number verification.","Single mandated modification: install Piper Part No. 765-365 per Piper SB No. 892 (Requirement) — a clear technical fix rather than multiple options.","Short, concrete compliance window: within 50 hours TIS after 20 January 1989 (Compliance) — operational/time pressure for affected operators.","Technical execution likely requires certified maintenance and parts procurement (implied by 'embody' and SB) — creates direct cost and downtime for owners/operators (Requirement).","Cross-reference to Teledyne Continental Service Bulletin M88-12 (Note) — adds a related technical document to consult."],"plain_english_summary":"This directive requires owners/operators of specified Piper PA‑46‑310P (Malibu) aeroplanes (listed serial numbers) to install Piper powerplant cooling improvement kit Part No. 765‑365 in accordance with Piper Service Bulletin No. 892 (Requirement; Applicability). Compliance is mandatory within 50 hours time‑in‑service after 20 January 1989 (Compliance). The stated purpose is to prevent catastrophic engine failure from excessive oil and cylinder head temperatures caused by insufficient cooling (Background). Owners/operators bear the cost and downtime for parts and installation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-46-15-powerplant-cooling","history":"/api/acts/ad-pa-46-15-powerplant-cooling/history","analysis":"/api/acts/ad-pa-46-15-powerplant-cooling/analysis","conflicts":"/api/acts/ad-pa-46-15-powerplant-cooling/conflicts","importantCases":"/api/acts/ad-pa-46-15-powerplant-cooling/important-cases","documents":"/api/acts/ad-pa-46-15-powerplant-cooling/documents"}}