{"id":"F2006B07003","name":"AD/SF340/73 - Electrical Wiring - Cabin Compartment Ceiling","slug":"ad-sf340-73-electrical-wiring-cabin-compartment-ceiling","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":48631,"registerId":"commonwealth-F2006B07003-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/SF340/73 Electrical Wiring - Cabin Co","sectionType":"part","heading":"AD/SF340/73 Electrical Wiring - Cabin Compartment Ceiling 2/2000","content":"# AD/SF340/73 Electrical Wiring \\- Cabin Compartment Ceiling 2/2000\n\nApplicability: Model SF340A aeroplanes, serial number (S/N) 004 through 159 and Model 340B aeroplanes, S/N 160 through 459.\n\nRequirement: Inspect the wiring harness routed through the cabin compartment ceiling, repair (if necessary) and install additional chafe protection in accordance with SAAB Aircraft AB Mandatory Service Bulletin SAAB 340-92-027 dated 10 December 1999.\n\nNote: LFV AD 1-149 refers.\n\nCompliance: Either before 14,000 hours total time in service is accumulated or within 4,000 hours time in service after the effective date of this directive, whichever occurs latest.\n\nThis Airworthiness Directive becomes effective on 24 February 2000.\n\nBackground: The manufacturer has advised of wire chafing occurring in the cabin ceiling area, where the wire passed through a frame lightening hole, which caused a false tailpipe hot warning. The wire chafing could cause other false warning and signal failures.\n\nThis directive ensures early detection of chafing and introduces measures designed to minimise the likelihood of further chafing of occurring.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 17 January 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 27 January 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":3,"scope_assessment":{"changed":false,"description":"The AD’s scope matches the stated safety issue: it targets SF340A/340B aeroplanes in the listed serial ranges and prescribes inspection, repair and added chafe protection per the SAAB service bulletin (Applicability; Requirement; Background). No change from that stated purpose is apparent in the text."},"complexity_factors":["Narrow applicability limited to specific serial number ranges increases administrative tracking (Applicability).","Mandates following an external manufacturer document (SAAB Mandatory Service Bulletin), so compliance requires access to and reliance on that SB for technical steps (Requirement).","Dual compliance timing rule (earlier of two thresholds) creates scheduling choices for operators (Compliance).","Inspections and potential repairs require maintenance resources, parts and certified personnel — a direct cost and operational downtime for operators (Requirement; Background).","Cross-reference to another authority’s AD (LFV AD) introduces an external regulatory linkage to check (Note).","Regulatory basis is an AD issued under CAR subreg 39.1(1), which vests the CASA delegate with decision authority (preamble)."],"plain_english_summary":"This Airworthiness Directive requires operators of SAAB SF340A (S/N 004–159) and 340B (S/N 160–459) aeroplanes to inspect the cabin‑ceiling wiring, repair any chafing and add extra chafe protection in accordance with SAAB Mandatory Service Bulletin SAAB 340-92-027 (Requirement). Operators must comply by either before 14,000 hours total time or within 4,000 hours after the AD’s effective date (Compliance). The measure responds to manufacturer reports of wire chafing that produced false warnings (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific wiring defect in specific aircraft. It has not expanded beyond its original purpose of correcting the identified chafing hazard."},"complexity_factors":["Single, clearly defined applicability (specific aircraft models and serial numbers)","One straightforward requirement with reference to external technical document (Service Bulletin)","Simple alternative compliance deadline (whichever occurs latest)","No defined terms section, no nested exceptions, no cross-references to other legislation beyond a single note","Short document (under 300 words of substantive text)","Single unsafe condition addressed with single mandated action"],"plain_english_summary":"This CASA safety order requires operators of certain Saab 340A/B aircraft to inspect cabin-ceiling electrical wiring, repair chafed or damaged conductors, and add protective wrapping to prevent further wear. It responds to incidents of wiring-induced false warnings (e.g., a spurious tailpipe-hot alert) and reduces risk of further false alarms or system failures. Owners, operators and maintenance crews must comply before 14,000 total flight hours or within 4,000 flight hours after 24 Feb 2000, whichever is later."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sf340-73-electrical-wiring-cabin-compartment-ceiling","history":"/api/acts/ad-sf340-73-electrical-wiring-cabin-compartment-ceiling/history","analysis":"/api/acts/ad-sf340-73-electrical-wiring-cabin-compartment-ceiling/analysis","conflicts":"/api/acts/ad-sf340-73-electrical-wiring-cabin-compartment-ceiling/conflicts","importantCases":"/api/acts/ad-sf340-73-electrical-wiring-cabin-compartment-ceiling/important-cases","documents":"/api/acts/ad-sf340-73-electrical-wiring-cabin-compartment-ceiling/documents"}}