{"id":"F2006B09234","name":"AD/DHC-8/76 - Electrical Arcing and High Pressure Fuel Line","slug":"ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53123,"registerId":"commonwealth-F2006B09234-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.001.png)  \n\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 aircraft or 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.\n\n![](image.001.png)\n\nBombardier (Boeing Canada/\n\nde Havilland) DHC-8 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/DHC-8/76 Electrical Arcing and High P","sectionType":"part","heading":"AD/DHC-8/76 Electrical Arcing and High Pressure Fuel Line 1/2001","content":"# AD/DHC-8/76 Electrical Arcing and High Pressure Fuel Line 1/2001\n\nDM\n\nApplicability: Model 201, 202, 301, 311, 314 and 315 series aeroplanes with Serial Numbers 100\n\nthrough 552 inclusive.\n\nRequirement: 1. Inspect the junction of wire bundle Part Number (P/N) 3021-14F20-2 and fuel line P/N 3036484 for damage, as described in Bombardier Alert Service Bulletin (ASB) A8-73-23 dated 3 November 2000.\n\n    2. If any damage is found during the Requirement 1 inspection repair the damage in accordance with ASB A8-73-23.\n\n    3. Incorporate Modification 8Q101164 in accordance with ASB A8-73-23.\n\nIncorporation of Modification 8Q101164 is terminating action for the Requirement 1 repetitive inspections.\n\nNote: Transport Canada AD CF-2000-33 refers.\n\nCompliance: For Requirement 1 - Within 50 hours time in service (TIS) or 10 days from the effective date of this Directive, whichever occurs first, and thereafter at intervals not to exceed 500 hours TIS or three months, whichever occurs first, until Modification 8Q101164 is incorporated.\n\nFor Requirement 2 \\- Before further flight.\n\nFor Requirement 3 \\- Within 1000 hours time TIS or six months from the effective date of this Directive, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 23 November 2000.\n\nBackground: Bombardier has advised that a DHC-8 aeroplane was found to have a pinhole in high pressure fuel line P/N 3036484 caused by electrical arcing from an adjoining wire bundle P/N 3021-14F20-2. The arcing occurred approximately 100 mm (4 inches) from the fuel-cooled oil cooler.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD targets the unsafe condition described by Bombardier for DHC‑8 airframes S/N 100–552 and prescribes inspections, repairs and a terminating modification per Bombardier ASB A8‑73‑23. The text provides no indication that the AD's applicability or obligations were broadened or narrowed beyond that identified unsafe condition; it remains limited to the specified models/serial numbers and corrective measures."},"complexity_factors":["Narrow applicability to specific DHC‑8 models and serial numbers (Applicability).","Identifies specific part numbers for the wire bundle and fuel line, requiring part-level checks (Requirement 1).","Requires following an external service document: Bombardier ASB A8‑73‑23 for inspection, repair and modification methods (Requirement 1–3).","Multiple, tiered compliance timeframes: immediate short-term inspection window, recurring inspection intervals, and a longer-term modification deadline (Compliance: 50 hrs/10 days; repeat 500 hrs/3 months; mod 1000 hrs/6 months).","Terminating action: incorporation of Modification 8Q101164 ends repetitive inspections (Requirement 3).","Operational impacts on operators: pre‑flight grounding if damage is found (Requirement 2), scheduling and downtime for inspections and modification, and repair costs borne by operators.","Regulatory provenance and discretion: issued by a CASA delegate under subregulation 39.1(1) of CAR 1998 and references Transport Canada AD CF‑2000‑33 (Background/Note)."],"plain_english_summary":"Requires operators of specified Bombardier DHC‑8 airframes (S/N 100–552) to inspect the junction between a wire bundle (P/N 3021‑14F20‑2) and a high‑pressure fuel line (P/N 3036484), repair any damage, and install Modification 8Q101164. Repetitive inspections continue until the modification is fitted; repairs must be completed before further flight. Bombardier reported a pinhole caused by electrical arcing near the fuel‑cooled oil cooler. Operators pay for and must schedule the inspections, repairs and the terminating modification."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific wiring/fuel line interference issue in defined aircraft serial numbers. No scope creep detected; it does exactly what it says on the tin."},"complexity_factors":["Short, single-purpose directive with only 3 requirements","Minimal defined terms (only standard aviation abbreviations like TIS, P/N, ASB)","Clear, sequential structure with explicit compliance deadlines","Single cross-reference to Transport Canada AD CF-2000-33 (informational only)","No nested exceptions or conditional logic beyond standard 'if damage found' branching","Total length: approximately 300 words"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of Bombardier DHC‑8 series 201/202/301/311/314/315 (serials 100–552) to inspect and fix a fuel‑line area where an electrical wire bundle sits too close, causing arcing and at least one pinhole leak. Inspections are required within 50 flight hours/10 days and every 500 hours/3 months until a mandated permanent modification (8Q101164) is installed within 1,000 hours/6 months. The AD prevents fuel leaks and potential fires."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line","history":"/api/acts/ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line/history","analysis":"/api/acts/ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line/analysis","conflicts":"/api/acts/ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line/conflicts","importantCases":"/api/acts/ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line/important-cases","documents":"/api/acts/ad-dhc-8-76-electrical-arcing-and-high-pressure-fuel-line/documents"}}