{"id":"F2005L03168","name":"AD/B767/39 Amdt 1 - Hydraulic System Component/Electrical Wiring Chafing Engine Struts","slug":"ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":134408,"registerId":"commonwealth-F2005L03168-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 767 Series Aeroplanes","sectionType":"division","heading":"Boeing 767 Series Aeroplanes","content":"### Boeing 767 Series Aeroplanes\n\n| AD/B767/39 Amdt 1 | Hydraulic System Component/Electrical Wiring Chafing Engine Struts | 12/2005 |\n| ----------------- | ------------------------------------------------------------------ | ------- |\n\n| Applicability: | Boeing 767 series aircraft listed in Boeing Alert Service Bulletin (ASB) 767-29A0054 dated 26 March 1990 together with aeroplanes line number 308 and 311.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | If not previously accomplished in accordance with the original issue of this Directive, inspect the wiring in the aft fairing area of the engine struts in accordance with ASB 767-29A0054, 767-29A0054 Revision 1 dated 24 May 1990 or 767-29A0054 Revision 2 dated 8 November 1990, to ensure sufficient clearance exists between the wire bundles and the hydraulic components in this area.                                                                                                                                                                                                                                                          |\n|                | Note: FAA AD 91-02-03 Amdt 39-6853 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| Compliance:    | Within 500 hours time in service after the effective date of this Amendment.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n|                | This Amendment becomes effective on 24 November 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n| Background:    | There have been nine reports of insufficient separation between the wiring bundles and hydraulic components in this area, and on three of these aircraft the AC motor pump feeder cable was chafed through. This had resulted in arcing, which on two of these aircraft had burned holes in the pump case drain tube, and on one of these aircraft had burned a hole in the boss on the hydraulic reservoir. The result of these holes was leakage of hydraulic fluid and loss of the affected hydraulic system. Although no fire occurred in any of these cases, ignition of the hydraulic fluid was possible with potentially disastrous consequences. |\n|                | This amendment results from a request under CASR 39.006 from industry to review the original Directive. The amendment corrects the applicability statement and includes an additional service bulletin revision as an alternate method of compliance, together with a reference to the superseding FAA Airworthiness Directive.                                                                                                                                                                                                                                                                                                                          |\n|                | The original issue of this Directive became effective on 6 September 1990.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n\n![](image.001.png)  \nJayaprakashan Ambali  \nDelegate of the Civil Aviation Safety Authority\n\n13 October 2005","sortOrder":0},{"sectionNumber":"AD/B767/39 Amdt 1","sectionType":"part","heading":"AD/B767/39 Amdt 1","content":"## AD/B767/39 Amdt 1","sortOrder":1},{"sectionNumber":"Hydraulic System Component/Electrical Wi","sectionType":"part","heading":"Hydraulic System Component/Electrical Wiring Chafing Engine Struts","content":"## Hydraulic System Component/Electrical Wiring Chafing Engine Struts","sortOrder":2},{"sectionNumber":"12/2005","sectionType":"part","heading":"12/2005","content":"## 12/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the 1990 directive. The changes are administrative corrections (fixing the applicability list) and procedural updates (adding an alternative compliance method and FAA reference). The core safety purpose—preventing wire chafing and hydraulic leaks in engine struts—remains unchanged."},"complexity_factors":["Short, single-purpose directive with one primary requirement (inspection)","Only 3 alternative compliance methods referenced (three revisions of one service bulletin)","Simple conditional logic: 'If not previously accomplished...' creates a single exemption","Clear, specific applicability statement though it requires cross-referencing an external Boeing document","Single compliance deadline (500 hours) with no tiered or conditional timelines","Minimal defined terms (relies on standard aviation terminology)","Straightforward amendment explanation in Background section"],"plain_english_summary":"This airworthiness directive for Boeing 767s mandates inspections of wiring in the engine-strut aft fairing to ensure wires don’t chafe against hydraulic components — a known issue that led to arcing and hydraulic leaks that could cause catastrophic fires. It applies to specified 767s (including two additional line numbers) and requires inspection within 500 flight hours after 24 Nov 2005 using approved Boeing service bulletins.\n\nThe amendment corrects the applicability, adds a newer bulletin revision as an acceptable compliance method, and references the related FAA directive."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment corrects the applicability statement and adds an additional ASB revision as an alternate method of compliance, and includes a reference to the superseding FAA Airworthiness Directive, thereby expanding acceptable compliance routes and clarifying which aeroplanes are covered (Background)."},"complexity_factors":["Narrow applicability: applies only to Boeing 767 series aeroplanes listed in Boeing ASB 767-29A0054 plus line numbers 308 and 311 (Applicability).","Single prescriptive action: mandated inspection of wiring in aft fairing area to ensure clearance from hydraulic components (Requirement).","Multiple acceptable compliance documents: original ASB and two revisions listed as alternate methods of compliance (Requirement; Background).","Short compliance window: inspection must be done within 500 hours time-in-service after the amendment effective date (Compliance).","Regulatory cross-reference: directive references and aligns with a superseding FAA AD (Requirement; Background).","Explicit operational risk history: nine reported occurrences including feeder-cable chafing and resultant hydraulic leaks described (Background), which grounds the prescriptive action but does not itself create varied remedies.","Limited administrative discretion: the AD prescribes method(s) of compliance by reference to specific ASB revisions rather than delegating broad options to operators (Requirement)."],"plain_english_summary":"This airworthiness directive requires operators of specified Boeing 767 aircraft to inspect wiring in the aft engine‑strut fairing for adequate clearance from hydraulic components, using one of the Boeing Alert Service Bulletin revisions listed in the directive. Operators must complete the inspection within 500 flight hours of the amendment becoming effective. The measure responds to reports of wiring chafing that caused hydraulic leaks; compliance actions and costs fall to aircraft operators."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts","history":"/api/acts/ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts/history","analysis":"/api/acts/ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts/analysis","conflicts":"/api/acts/ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts/conflicts","importantCases":"/api/acts/ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts/important-cases","documents":"/api/acts/ad-b767-39-amdt-1-hydraulic-system-component-electrical-wiring-chafing-engine-struts/documents"}}