{"id":"F2006B08208","name":"AD/CESSNA 320/29 Amdt 1 - Powerplant Fire Detection System - Installation","slug":"ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115431,"registerId":"commonwealth-F2006B08208-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 320/29 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 320 Series Aeroplanes\n\nAD/CESSNA 320/29\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":{"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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The amendment clarified the intent of Note 2 (the recommendation about audible warnings and extinguishing systems) rather than expanding the core mandatory requirement to install a fire‑detection system or the maintenance instruction duty. Background (a) records that the Directive was amended for clarification; the substantive applicability and primary Requirement remain unchanged."},"complexity_factors":["Mandatory equipment installation across all models increases universal compliance burden (Applicability, Requirement).","Specification standard left to Secretary's acceptance creates administrative discretion (Requirement).","Cross-reference to an external standard (US FAR Part 23 ¶1203) shifts technical compliance to an external regime (Note 1).","Obligation to amend approved maintenance system requires coordination with approved maintenance organisations and documentation updates (Requirement).","Clear compliance deadline imposes time pressure and potential retrofitting costs (Compliance).","Recommendation (not mandate) to consider audible warnings and extinguishers introduces optional safety upgrades and potential ambiguity between mandatory and recommended measures (Note 2; Background a).","Safety rationale grounded in specific failure mode (hot gas from exhaust manifolds) requires technical tailoring of detector/installation (Background b)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of all Cessna 320 series aeroplanes to install a powerplant fire‑detection system that meets a specification acceptable to the Secretary and to include adequate maintenance instructions in the approved maintenance system. Compliance was required by 1 April 1983. Owners/operators pay for installation and maintenance changes; the Secretary exercises discretion over acceptable specifications (the AD accepts systems complying with US FAR Part 23 §1203). The AD also recommends considering audible warnings and fire‑extinguishing systems (ANO 101.4 para 6.14)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is an amendment (Amdt 1) that explicitly states its purpose: to clarify the intent of Note 2. The scope remains tightly focused on fire detection system installation for Cessna 320 aircraft, exactly as originally intended. No scope creep is evident."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements","No defined terms section","No cross-references to other legislation (only optional reference to US FAA standards and non-binding recommendation to ANO 101.4)","Simple conditional structure: one mandatory action with a single compliance deadline","Background section provides clear safety rationale without legal complexity"],"plain_english_summary":"Owners and operators of Cessna 320-series aeroplanes must install an engine-area fire detection system to warn of fires or dangerous heat from leaking exhaust—an issue that has caused nacelle and wing damage and risked lives. Systems meeting US FAR Part 23.1203 are acceptable; maintenance manuals must cover the system. Compliance deadline was 1 April 1983. CASA also recommends adding audible alarms and fire extinguishing systems for extra safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation","history":"/api/acts/ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation/history","analysis":"/api/acts/ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation/analysis","conflicts":"/api/acts/ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation/conflicts","importantCases":"/api/acts/ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation/important-cases","documents":"/api/acts/ad-cessna-320-29-amdt-1-powerplant-fire-detection-system-installation/documents"}}