{"id":"F2006B08369","name":"AD/CESSNA 400/86 Amdt 1 - Powerplant Fire Detection System - Installation","slug":"ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115785,"registerId":"commonwealth-F2006B08369-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/86 Amdt 1 - Powerplant Fire Detection System - Installation","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)  \nCessna 400 Series Aeroplanes\n\nAD/CESSNA 400/86\n\nAmdt 1\n\nApplicability: All models.\n\n  \n\nPowerplant Fire Detection System - Installation\n\n  \n9/84\n\nRequirement: 1. Install a powerplant fire detection system complying with a specification acceptable to the Secretary.\n\n2. Ensure that maintenance instructions for the system are adequately detailed in the approved maintenance system for the aircraft.\n\nNote 1. Fire detection systems which have been shown to comply with paragraph 1203 of Part 23 of the US Federal Aviation Regulations are acceptable as complying with this Airworthiness Directive.\n\nNote 2. It is recommended, in the interest of safety, that when complying with this Directive, consideration be given to the installation of both audible fire warning devices and fire extinguishing systems. A suitable standard for this can be found in ANO 101.4 Para 6.14.\n\nCompliance: Before 1 April 1983.\n\nBackground: a. This Directive has been amended in order to clarify the intent of Note 2 in the Requirement.\n\nb. Hot gas escaping from failed exhaust manifolds has caused serious structural damage to nacelles and wings. This damage may remain undetected in flight with potentially fatal results. In order to reduce this threat fire detectors are to be installed.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2424},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Amendment 1 clarifies the wording of Note 2 (a non-mandatory safety recommendation regarding audible warnings and extinguishing systems) but does not alter the core scope requiring installation of fire detection systems in Cessna 400 series aircraft."},"complexity_factors":["Short, single-purpose directive targeting one specific aircraft series","Only one mandatory technical requirement with a clear compliance deadline","Contains two explanatory notes referencing external standards (US FAR Part 23)","Limited conditional logic or nested exceptions","Amendment consists solely of clarifying language for a non-mandatory recommendation"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of Cessna 400 series aircraft to install an approved engine‑compartment fire detection system and add maintenance instructions for it. Systems meeting FAR Part 23.1203 are accepted; installation of an audible alarm and a fire‑extinguishing system is strongly recommended. The rule responds to hot‑gas leaks from fractured exhaust manifolds that can cause unseen structural wing/engine damage and must be complied with by 1 April 1983."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation","history":"/api/acts/ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation/history","analysis":"/api/acts/ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation/analysis","conflicts":"/api/acts/ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation/conflicts","importantCases":"/api/acts/ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation/important-cases","documents":"/api/acts/ad-cessna-400-86-amdt-1-powerplant-fire-detection-system-installation/documents"}}