{"id":"F2006B03334","name":"AD/B767/158 - P50 Panel - Electrical Wire Bundles Inspection and Protection","slug":"ad-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42771,"registerId":"commonwealth-F2006B03334-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/158 - P50 Panel - Electrical Wire Bundles Inspection and Protection","content":"![](image.001.png)\n\n![](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 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\nBoeing 767 Series Aeroplanes\n\nAD/B767/158 P50 Panel \\- Electrical Wire Bundles\n\nInspection and Protection\n\n  \n11/2001\n\nDM\n\nApplicability: Model 767-200, -300, and -300F series aeroplanes, as listed in Boeing Alert Service Bulletin (ASB) 767-24A0139, and Model 767-400ER series aeroplanes as listed in Boeing ASB 767-24A0140, both dated 9 February 2001.\n\nRequirement: 1. Carry out a detailed visual inspection of the wire bundles between the P50 panel and the nose wheel structure to find discrepancies (i.e. chafed or broken wires, damaged insulation or conductors, inadequate clearance between the wire bundle, insulation and nose wheel well structure) in accordance with ASB 767-24A0139 (for Model 767-200, -300, and -300F series aeroplanes), or ASB 767-24A0140 (for Model 767-400ER series aeroplanes), as applicable.\n\nNote 1: For the purposes of this Directive, a detailed visual inspection is defined as: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.”\n\n2. If any discrepancy is found during the Requirement 1 inspection, repair or replace any damaged wires or worn components; install protective sleeving over the wire bundles and relocate the wire bundle to provide adequate clearance in accordance with Figure 1 of the Accomplishment Instructions of either ASB 767- 24A0139 or ASB 767-24A0140 as applicable.\n\nNote 2: Accomplishment of Requirement 2 is not considered terminating action for the Requirement 1 repetitive inspections.\n\nNote 3: FAA AD 2001-18-12 Amdt 39-12438 refers.\n\nCompliance: For Requirement 1 - Within 90 days after the effective date of this Directive and thereafter every 6,000 hours time in service or 18 months, whichever occurs first.\n\nFor Requirement 2 - Before further flight after the Requirement 1 inspection. This Airworthiness Directive becomes effective on 28 September 2001.\n\nBoeing 767 Series Aeroplanes\n\nAD/B767/158 (Continued)\n\nBackground: This Directive requires repetitive inspections to find discrepancies of the wire bundles located between the P50 panel and the nose wheel well structure and, if necessary, corrective action. These actions are necessary to find and rectify discrepancies, which could result in electrical arcing, smoke and/or fire in the cabin together with failure of certain systems essential to safe flight.\n\n![Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 18 September 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 26 September 2001.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive's scope remains focused on inspection and protection of P50-to-nose-wheel electrical wire bundles for the listed Boeing 767 models (Applicability; Requirement; Background). It does not expand to other wiring locations or aircraft types and retains the original safety-limitation objective described in the Background."},"complexity_factors":["Model-specific applicability across multiple 767 variants requires checking ASB applicability lists (Applicability).","Technical inspection standard: a defined \"detailed visual inspection\" with potential need for access, cleaning and inspection aids (Note 1).","Two-tiered obligations: repetitive inspections (Requirement 1) plus mandatory immediate corrective measures if discrepancies found (Requirement 2).","Cross-references to external Boeing Alert Service Bulletins for procedures and Figure 1 for clearance/relocation details (Requirement; Accomplishment Instructions).","Compliance timing constraints: initial deadline (90 days), then repetitive intervals by hours-in-service or months, and Requirement 2 must be done before further flight (Compliance).","Non-terminating corrective action: installing protection/relocation does not end the need for repetitive inspections (Note 2).","External regulatory linkage: reference to corresponding FAA AD (Note 3) may affect harmonisation with overseas operators.","Operational impact on operators/maintainers: immediate repair-before-flight mandate and ongoing inspection burden create recurring maintenance scheduling and recordkeeping obligations (Requirement 2; Compliance)."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Boeing 767 models to carry out repeated detailed visual inspections of the electrical wire bundles between the P50 panel and the nose wheel structure, and to repair, add protective sleeving and reposition any damaged wiring per the referenced Boeing Alert Service Bulletins. The stated purpose is to prevent electrical arcing, smoke or fire and loss of systems; the AD sets inspection standards, timing and mandatory corrective actions that aircraft operators and maintenance organisations must follow."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains a narrow, focused scope on its original safety purpose: preventing electrical hazards in a specific wiring location on Boeing 767 aircraft. It does not expand beyond the identified unsafe condition (wire bundle chafing in the P50 panel/nose wheel area) to cover unrelated systems or aircraft types."},"complexity_factors":["Single specific technical subject matter (wire bundle inspection) with clear scope","Only 2 main requirements with straightforward conditional logic (if discrepancy found → repair)","4 defined terms/concepts: 'detailed visual inspection' (explicitly defined in Note 1), 'terminating action' (referenced in Note 2), 'time in service', and references to external Boeing documents","External cross-references to 2 Boeing Alert Service Bulletins and 1 FAA AD, but these are clearly identified and dated","Simple compliance timeline with basic calculation (90 days + recurring 6,000 hours/18 months)","Limited exception/conditional structure: only one 'if/then' condition in Requirement 2"],"plain_english_summary":"This CASA safety order requires operators of certain Boeing 767 models to inspect and, if needed, repair wiring between the P50 electrical panel and the nose wheel structure to prevent chafing, arcing, smoke or fire and possible flight-system failures. Affected owners and maintenance crews must fix any damage and add protective sleeving before the next flight, and continue recurring inspections to ensure ongoing safety."},"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-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection","history":"/api/acts/ad-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection/history","analysis":"/api/acts/ad-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection/analysis","conflicts":"/api/acts/ad-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection/conflicts","importantCases":"/api/acts/ad-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection/important-cases","documents":"/api/acts/ad-b767-158-p50-panel-electrical-wire-bundles-inspection-and-protection/documents"}}