{"id":"F2006B10566","name":"AD/HS 748/30 - Electrical Cable Chafing","slug":"ad-hs-748-30-electrical-cable-chafing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116395,"registerId":"commonwealth-F2006B10566-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.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 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\nBritish Aerospace (Hawker Siddeley) HS 748 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/HS 748/30 Electrical Cable Chafing 12","sectionType":"part","heading":"AD/HS 748/30 Electrical Cable Chafing 12/2002","content":"# AD/HS 748/30 Electrical Cable Chafing 12/2002\n\nTX\n\nApplicability: All HS 748 series aeroplanes.\n\nRequirement: 1. Inspect the wing dry areas in accordance with BAe Systems Alert Service Bulletin (ASB) HS748-A28-44 dated 26 September 2002.\n\n2. If any discrepancies are detected during the Requirement 1 inspections, accomplish any necessary repairs or replacements in accordance with ASB HS748-A28-44.\n\nNote: This Alert Service Bulletin has been classified as ‘Mandatory’ by the CAA(UK).\n\nCompliance: For Requirement 1 - Within 48 hours after the effective date of this Directive or immediately on reaching a maintenance base capable of carrying out the inspection.\n\nFor Requirement 2 \\- Before further flight.\n\nThis Airworthiness Directive becomes effective on 2 October 2002.\n\nBackground: BAe Systems has advised of receiving a report from an ATP operator of a fire in the dry area of the wing. The fire has been attributed to chafe damage between an electrical cable and a fuel cross feed drainpipe. The chafe damage was severe enough to cause fuel leakage from the pipe; electrical sparks from the damaged cable probably ignited the fuel.\n\nAs ATP and HS 748 aeroplanes are similar, this condition could also exist on HS 748 aeroplanes. This Directive requires the inspection of the wing dry areas to ensure the fuel and electrical systems are safe.\n\n![](image.002.png)  \n\nBarry James Reid McKay\n\nDelegate of the Civil Aviation Safety Authority 30 September 2002\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific airworthiness concern (electrical cable chafing in wing dry areas). The scope remains precisely limited to the identified unsafe condition and the specific aircraft type affected. No scope creep is evident."},"complexity_factors":["Very short document (under 400 words)","Only 2 substantive requirements with clear conditional logic (if damage found → repair)","Single defined term referenced (Alert Service Bulletin) with explicit document number and date","No nested exceptions or complex cross-referencing to other legislation","Straightforward compliance timeline (48 hours or immediate)","Single applicability criterion (all HS 748 series aircraft)"],"plain_english_summary":"This CASA Airworthiness Directive orders immediate inspection of wing \"dry areas\" on all British Aerospace HS 748 aircraft in Australia to check for electrical cables chafing fuel pipes — prompted by an ATP fire where a worn cable breached a fuel drainpipe and ignited. Operators and maintainers must inspect within 48 hours (or on reaching a maintenance base) per BAe Systems Alert SB HS748-A28-44 and repair any damage before flight. Compliance is mandatory; the UK regulator has already mandated the same bulletin."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive addresses a specific unsafe condition reported on a similar ATP type and extends the safety requirement to all HS 748 series aeroplanes (Background; Applicability). It does not broaden obligations beyond inspection and required repairs per the BAe ASB, nor does it add ongoing surveillance duties; it specifies timing and that repairs be completed before further flight (Requirement; Compliance)."},"complexity_factors":["Reference to an external technical document (BAe Systems ASB HS748‑A28‑44) — requires access to and implementation of the manufacturer’s procedures (Requirement).","Short compliance timeframe — inspections within 48 hours or immediately on reaching a maintenance base (Compliance) increases operational urgency.","Safety‑critical repairs required before further flight — work must be done to an airworthy standard and may need specialised maintenance resources (Requirement 2).","Applicability to the entire HS 748 fleet — broad operational and cost impact for all operators (Applicability).","Technical nature of the defect (electrical cable chafing against a fuel drainpipe) — inspection and rectification require trained personnel and possible parts replacement (Background; Requirement).","Delegated regulatory enforcement under subregulation 39.1(1) of CAR 1998 — creates clear legal obligation and potential sanction for non‑compliance (preamble).","Cross‑reference to CAA(UK) classification of the ASB as ‘Mandatory’ — supports the prescriptive nature but requires coordination with the ASB text (Note)."],"plain_english_summary":"**What it does:** Requires inspection of the wing dry areas on all British Aerospace HS 748 series aeroplanes in accordance with BAe Systems Alert Service Bulletin HS748‑A28‑44, and mandates repair or replacement of any chafe damage before further flight. **Who it affects and why it matters:** Issued by CASA under subregulation 39.1(1) of CAR 1998, the rule obliges HS 748 operators and maintenance providers to carry out short‑term inspections (48 hours or on reaching a capable maintenance base) and to meet repair costs and downtime (Requirement; Compliance)."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-748-30-electrical-cable-chafing","history":"/api/acts/ad-hs-748-30-electrical-cable-chafing/history","analysis":"/api/acts/ad-hs-748-30-electrical-cable-chafing/analysis","conflicts":"/api/acts/ad-hs-748-30-electrical-cable-chafing/conflicts","importantCases":"/api/acts/ad-hs-748-30-electrical-cable-chafing/important-cases","documents":"/api/acts/ad-hs-748-30-electrical-cable-chafing/documents"}}