{"id":"F2013L01958","name":"AD/CESSNA 400/86 Amdt 2 - Powerplant Fire Detection System - Installation","slug":"ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":128091,"registerId":"commonwealth-F2013L01958-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 400 Series Aeroplanes","sectionType":"division","heading":"Cessna 400 Series Aeroplanes","content":"### Cessna 400 Series Aeroplanes\n\n| AD/CESSNA 400/86 Amdt 2 | Powerplant Fire DetectionSystem - Installation | 24/2013 |\n| ----------------------- | ---------------------------------------------- | ------- |\n\n| Applicability: | All models.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Install a powerplant fire detection system acceptable to CASA.2. Ensure that maintenance instructions for the system are adequately detailed in the approved maintenance program for the system.Note 1. Fire detection systems which have been shown to comply with Part 23.1203 of the US Federal Aviation Regulations are an acceptable means of compliance with this Airworthiness Directive.Note 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. |\n| Compliance:    | Remains unchanged as detailed in Amendment 1 of this AD as: Before 1 April 1983.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n|                | The effective date of this AD is 29 November 2013.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | Amendment 2 of this Directive has been issued only to remove obsolete terms and references to obsolete regulations in the Requirement and in Note 2.Amendment 1 was issued to clarify the intent of Note 2, in the Requirement.This Directive was initially issued to address the identified unsafe condition where hot gas escaping from failed exhaust manifolds had 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.                                    |\n\n![](image.001.png)\n\nMike Higgins  \nDelegate of the Civil Aviation Safety Authority\n\n15 November 2013","sortOrder":0},{"sectionNumber":"AD/CESSNA 400/86 Amdt 2","sectionType":"part","heading":"AD/CESSNA 400/86 Amdt 2","content":"## AD/CESSNA 400/86 Amdt 2","sortOrder":1},{"sectionNumber":"Powerplant Fire DetectionSystem - Instal","sectionType":"part","heading":"Powerplant Fire DetectionSystem - Installation","content":"## Powerplant Fire Detection  \nSystem - Installation","sortOrder":2},{"sectionNumber":"24/2013","sectionType":"part","heading":"24/2013","content":"## 24/2013","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 2 did not alter the substantive requirements. It removed obsolete terminology and references; Amendment 1 clarified the intent of Note 2. The core mandate — install a CASA‑acceptable powerplant fire detection system and include maintenance instructions in the approved maintenance program — remains unchanged (Requirement; Background; Amendment 2)."},"complexity_factors":["Wide applicability — applies to \"All models\" of the Cessna 400 series (Applicability).","Regulatory discretion — system must be \"acceptable to CASA\", which creates administrative judgement about conformity (Requirement).","Maintenance-program integration — requires insertion of detailed maintenance instructions into the approved maintenance program, creating ongoing compliance and record-keeping obligations (Requirement).","Acceptable means of compliance cross-reference — Note 1 permits use of systems shown to comply with US FAR Part 23.1203, adding a technical compliance pathway that requires verification (Requirement / Note 1).","Non-mandatory recommendations — Note 2 recommends consideration of audible warnings and extinguishing systems, creating optional retrofit choices and potential extra costs (Requirement / Note 2).","Temporal/admin oddity — compliance deadline listed as \"Before 1 April 1983\" while the instrument's effective date is 29 November 2013, which may require historical records checks to confirm compliance status (Compliance).","Amendments are editorial — Amendment 2 removed obsolete terms/references and Amendment 1 clarified Note 2; the substantive technical requirement remains, but tracing versions may be needed for certification/maintenance records (Background / Amendment 2).","Safety rationale involves latent structural damage — the underlying hazard (hot gas from failed exhaust manifolds causing undetected structural damage) requires technical inspection regimes beyond mere detector installation (Background)."],"plain_english_summary":"This directive requires all Cessna 400 series aeroplanes to have a CASA‑approved powerplant fire‑detection system installed and to include detailed maintenance instructions for that system in the aircraft's approved maintenance program. It affects owners/operators and maintenance organisations who pay for installation and ongoing upkeep; CASA decides acceptability. The stated purpose is to detect fires from failed exhaust manifolds that can cause hidden structural damage. Compliance can follow systems shown to meet US FAR Part 23.1203 (Note 1)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment explicitly does not alter the scope. The Background section states Amendment 2 was issued 'only to remove obsolete terms and references to obsolete regulations.' The substantive safety requirement (install fire detection systems) and the compliance deadline (before 1 April 1983) remain identical to Amendment 1. The scope has remained stable since the original 1986 directive."},"complexity_factors":["Very short document (approximately 250 words of substantive content)","Only 2 substantive requirements with clear, unambiguous language","Single applicability criterion ('All models') with no exceptions or carve-outs","Minimal defined terms — only standard aviation terminology used","No cross-references to other legislation beyond a single reference to US Federal Aviation Regulations (Part 23.1203) as an optional compliance pathway","No conditional logic, nested exceptions, or 'if-then' structures","Compliance deadline remains unchanged from previous amendment — no new temporal calculations required","Background section provides clear safety rationale without legal technicality"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna 400 series aeroplanes to install an approved engine-area fire detection system and update maintenance instructions so fires from escaping exhaust gases are detected before causing hidden structural damage. Systems meeting US Part 23.1203 standards comply.\n\nThis is Amendment 2 (Nov 2013): it does not change the safety requirement or the April 1983 compliance deadline, only cleans up outdated regulatory language. Audible alarms and fire extinguishers are recommended but not mandatory."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation","history":"/api/acts/ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation/history","analysis":"/api/acts/ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation/analysis","conflicts":"/api/acts/ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation/conflicts","importantCases":"/api/acts/ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation/important-cases","documents":"/api/acts/ad-cessna-400-86-amdt-2-powerplant-fire-detection-system-installation/documents"}}