{"id":"F2006B07004","name":"AD/SF340/74 - Cargo Compartment Fire Detectors","slug":"ad-sf340-74-cargo-compartment-fire-detectors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48634,"registerId":"commonwealth-F2006B07004-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/SF340/74 Cargo Compartment Fire Detec","sectionType":"part","heading":"AD/SF340/74 Cargo Compartment Fire Detectors 3/2000","content":"# AD/SF340/74 Cargo Compartment Fire Detectors 3/2000\n\nApplicability: Model SF340A aeroplanes, serial number (S/N) 004 through 159 and Model 340B aeroplanes, S/N 160 through 459.\n\nRequirement: Replace cargo compartment smoke detectors manufactured by Fenwall with smoke detectors, part number CGAB1201-01, manufactured by Cerberus SA in accordance with SAAB Aircraft AB Mandatory Service Bulletin SAAB 340-26-023 dated\n\n21 December 1999.\n\nNote: LFV AD 1-151 refers.\n\nCompliance: Before 28 December 2001.\n\nThis Airworthiness Directive becomes effective on 23 March 2000.\n\nBackground: The Luftfartsverket, the Swedish Civil Aviation Administration, has advised that field experience has demonstrated that smoke detectors, located in the cargo compartment, manufactured by Fenwall exhibit poor reliability, resulting in false warning occurring during high humidity environmental conditions.\n\nThis Directive mandates the replacement of the current cargo compartment smoke detectors with new units that have increased reliability and decreased maintenance.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 10 February 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.","sortOrder":1}],"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":2,"scope_assessment":{"changed":false,"description":"The AD's scope matches its stated safety objective: it targets specified SF340 serial-numbered aircraft and mandates replacement of Fenwall cargo smoke detectors with a specific Cerberus part per the SAAB service bulletin. It does not broaden applicability or require additional unrelated actions (see Applicability; Requirement; Background)."},"complexity_factors":["Narrow applicability: specific models and serial number ranges only (Applicability).","Single, explicit technical action: replace a named part with a named part number (Requirement).","Mandatory incorporation of a manufacturer service bulletin for installation details (Requirement: SAAB 340-26-023).","Fixed compliance deadline creates scheduling and operational downtime costs for operators (Compliance).","Regulatory basis and signature by CASA delegate; limited administrative discretion in substance (preamble and signature).","Cross-reference to foreign AD and note (LFV AD 1-151) may require operators to check related foreign guidance (Note).","Safety rationale drawn from reported in-service reliability failures in specific environmental conditions (Background)."],"plain_english_summary":"This AD requires operators of SAAB SF340A (S/N 004–159) and 340B (S/N 160–459) to replace Fenwall cargo-compartment smoke detectors with Cerberus CGAB1201-01 units per SAAB Mandatory Service Bulletin SAAB 340-26-023, before 28 December 2001. CASA issued the directive because Fenwall detectors showed poor reliability and false warnings in high-humidity conditions; aircraft owners/operators pay for replacements and must schedule the work to comply (Applicability; Requirement; Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope. It addresses a specific technical defect in a specific aircraft type with a specific replacement part. There is no evidence of scope creep; the directive remains tightly focused on the cargo compartment smoke detector replacement issue as originally identified."},"complexity_factors":["Very short document (approximately 250 words)","Only 4 defined elements: specific aircraft models, serial number ranges, manufacturer part numbers, and a single referenced service bulletin","No nested exceptions or conditional logic — the requirement applies straightforwardly to all listed aircraft","Single compliance deadline with no alternative methods or phased implementation","Minimal cross-referencing (only one note referencing a Swedish aviation directive, LFV AD 1-151, for information purposes)"],"plain_english_summary":"This CASA Airworthiness Directive orders operators of specified Saab 340A/B aircraft to replace unreliable Fenwall cargo-hold smoke detectors with Cerberus units (P/N CGAB1201-01) per the manufacturer’s 21 Dec 1999 service bulletin, to stop false alarms in humid conditions and ensure real fires are detected. It affects owners, airlines and maintenance crews and must be completed before 28 December 2001."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-74-cargo-compartment-fire-detectors","history":"/api/acts/ad-sf340-74-cargo-compartment-fire-detectors/history","analysis":"/api/acts/ad-sf340-74-cargo-compartment-fire-detectors/analysis","conflicts":"/api/acts/ad-sf340-74-cargo-compartment-fire-detectors/conflicts","importantCases":"/api/acts/ad-sf340-74-cargo-compartment-fire-detectors/important-cases","documents":"/api/acts/ad-sf340-74-cargo-compartment-fire-detectors/documents"}}