{"id":"F2006B10454","name":"AD/HS 125/171 - Engine Fire Extinguishing Wiring","slug":"ad-hs-125-171-engine-fire-extinguishing-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116171,"registerId":"commonwealth-F2006B10454-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# ![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\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 CASR 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\nBritish Aerospace BAe 125 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/HS 125/171 Engine Fire Extinguishing ","sectionType":"part","heading":"AD/HS 125/171 Engine Fire Extinguishing Wiring 8/2004","content":"# AD/HS 125/171 Engine Fire Extinguishing Wiring 8/2004\n\nDM\n\nApplicability: Model BAe.125 series 800A (including C-29A and U- 125 variant) and 800B aeroplanes and Model Hawker 800 (including U- 125A variant) and 800XP aeroplanes, as listed in Raytheon Service Bulletin SB 26-3610, Revision 1, dated September 2003.\n\nRequirement: 1. Carry out the following in accordance with the Accomplishment Instructions of SB 26-3610, Revision 1:\n\n    Perform a functional test of the engine fire extinguishing wiring for appropriate installation and verify the correct wiring connector installation, and\n\n    b. Install the new marker bands.\n\n2. If any connector is found wired incorrectly during the Requirement 1 verification, correct the wiring.\n\nNote: FAA AD 2004-11-01 Amdt 39-13646 refers.\n\nCompliance: For Requirement 1 \\- Within 70 hours time in service or 30 days after the effective date of this Directive, whichever occurs first.\n\nFor Requirement 2 \\- Prior to further flight after Requirement 1 is accomplished. This Airworthiness Directive becomes effective on 7 July 2004.","sortOrder":1}],"analysis":{"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":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific unsafe condition in specific aircraft models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific technical requirement with clear cross-reference to manufacturer service bulletin (SB 26-3610)","Only 2 main requirements with straightforward conditional logic (if wrong wiring found → fix it)","Simple compliance timeframe (70 hours/30 days whichever first)","Limited applicability (specific aircraft models only)","No nested definitions, no interpretation section, no complex cross-referencing between multiple legislative instruments","Total length: approximately 250 words"],"plain_english_summary":"CASA's AD requires owners/operators of specified BAe 125/Hawker 800 series jets (as listed in the Raytheon service bulletin) to inspect and test engine fire‑extinguishing wiring, verify connector installation, and install marker bands. Any incorrect wiring must be rectified before the aircraft next flies. The inspection is to be completed within 70 flight hours or 30 days of the AD's 7 July 2004 effective date."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive as issued applies to the listed BAe 125/800 variants and requires testing, marker band installation and correction of miswired connectors per SB 26‑3610 Rev 1 within the stated compliance times. The text contains no indication it expands or narrows that original applicability or the remedial scope."},"complexity_factors":["Safety‑critical electrical wiring inspection and potential repair (technical specialised work).","Mandatory compliance with an external maintenance document: Raytheon SB 26‑3610 Rev 1 (requires access to that SB and conformity).","Applicability covers multiple BAe 125/800 variants (operator identification and applicability checks required).","Short compliance deadline: within 70 flight hours or 30 days (scheduling/operational disruption).","Any correction must be completed before further flight (immediate grounding risk for non‑conforming aircraft).","Low regulatory discretion: clear pass/fail functional test and mandatory corrective action (procedural simplicity).","Costs fall directly on aircraft operators (inspection, parts, labour), creating concentrated compliance costs and potential short‑term loss of available aircraft."],"plain_english_summary":"The directive requires operators of specified BAe 125 / Hawker 800 series aeroplanes to test the engine fire‑extinguishing wiring, install new marker bands, and correct any miswired connectors in accordance with Raytheon Service Bulletin SB 26‑3610 Revision 1. CASA says the measure corrects an identified unsafe condition. Operators pay for inspections and repairs; the work must be done within 70 flight hours or 30 days and any corrections must be completed before further flight, which may cause short‑term maintenance downtime."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-171-engine-fire-extinguishing-wiring","history":"/api/acts/ad-hs-125-171-engine-fire-extinguishing-wiring/history","analysis":"/api/acts/ad-hs-125-171-engine-fire-extinguishing-wiring/analysis","conflicts":"/api/acts/ad-hs-125-171-engine-fire-extinguishing-wiring/conflicts","importantCases":"/api/acts/ad-hs-125-171-engine-fire-extinguishing-wiring/important-cases","documents":"/api/acts/ad-hs-125-171-engine-fire-extinguishing-wiring/documents"}}