{"id":"F2006B03200","name":"AD/B747/307 - Integrated Drive Generator Power Feeder Cables","slug":"ad-b747-307-integrated-drive-generator-power-feeder-cables","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42572,"registerId":"commonwealth-F2006B03200-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/307 - Integrated Drive Generator Power Feeder Cables","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 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\nBoeing 747 Series Aeroplanes\n\nAD/B747/307 Integrated Drive Generator Power Feeder\n\nCables\n\n  \n8/2004\n\nApplicability: Model 747-400 and \\-400F series aeroplanes having line numbers 696 through 1310 inclusive and equipped with Rolls Royce engines.\n\nRequirement: 1. Perform a general visual inspection for damage or arcing of the power feeder cables of the integrated drive generator (IDG) and the cable conduit, per the Accomplishment Instructions of Boeing Service Bulletin (SB) 747-24A2240, Revision 1, dated 20 February 2003.\n\nNote 1: For the purposes of this Directive, a general visual inspection is defined as: ‘A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.’\n\n    2. Repair any damage, detected during the Requirement 1 inspection, in accordance with SB 747-24A2240, Revision 1.\n\n    3. Perform a general visual inspection for chafing and arcing damage of the power feeder cables of the IDG and hydraulic lines on each outboard strut aft of the block clamp, per the Accomplishment Instructions of Boeing Alert Service Bulletin (ASB) 747-24A2247, dated 10 July 2003.\n\n    4. Repair any chafing or arcing damage, detected during the Requirement 3 inspection, in accordance with ASB 747-24A2247.\n\n    5. Remove the conduit, install a new shield/bracket assembly and replace two hydraulic lines with two new hydraulic lines in each engine strut, per the Accomplishment Instructions of Boeing SB 747-24A2242, Revision 1, dated 14 August 2003.\n\n    6. Pressurise the hydraulic system, examine the new hydraulic lines and connectors for leaks and, if necessary, repair any leaks in accordance with Accomplishment Instructions of SB 747-24A2242, Revision 1.\n\nAccomplishment of Requirements 5 and 6 terminates the Requirement 1 repetitive inspections.\n\n    7. Replace the wiring and hydraulic tubing support bracket per the Accomplishment Instructions of Boeing ASB 747-24A2243, dated 31 October 2002.\n\nAccomplishment of Requirement 7 terminates the Requirement 3 repetitive inspections.\n\nNote 2: FAA AD 2004-11-03 Amdt 39-13648 refers.\n\nCompliance: For Requirement 1 \\- Within 90 days after the effective date of this Directive and thereafter, at intervals not to exceed 10,000 hours time in service (TIS), until Requirements 5 and 6 are accomplished.\n\nFor Requirement 2 \\- Before further flight after the Requirement 1 inspection.\n\nFor Requirement 3 \\- Within 90 days after the effective date of this Directive and thereafter, at intervals not to exceed 10,000 hours TIS, until Requirement 7 is accomplished.\n\nFor Requirement 4 - Before further flight after the Requirement 3 inspection. For Requirement 5 \\- Within 48 months after the effective date of this Directive. For Requirement 6 - Before further flight after completing Requirement 5.\n\nFor Requirement 7 \\- Within 48 months after the effective date of this Directive. This Airworthiness Directive becomes effective on 5 August 2004.\n\nBackground: This Directive requires repetitive inspections for damage or arcing of the IDG power feeder cables and conduit in the forward section of all four struts together with any necessary repairs. The Directive also requires repetitive inspections for chafing damage or arcing of the adjacent hydraulic lines in the aft section of the outboard struts. Additionally, the Directive introduces eventual terminating actions for the repetitive inspections.\n\nThese action are necessary to prevent damage and arcing to the conduit and power feeder cables of the IDG, which could result in a fire in the engine strut; and to prevent damage to the adjacent hydraulic lines in the aft section of the outboard struts, which could result in reduced controllability of the aeroplane.\n\n![Signature of James Coyne, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 23 June 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 July 2004.","sortOrder":0}],"analysis":{"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"},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The Directive addresses the unsafe condition identified in the Background—preventing arcing/fire of IDG feeder cables and damage to adjacent hydraulic lines—by prescribing inspections, repairs and terminating modifications for the specified fleet subset. The measure does not expand applicability beyond the stated models/line numbers and engine type; it replaces repetitive inspections with specific retrofit actions as set out in the Requirements and referenced Boeing service documents."},"complexity_factors":["Multiple, staged requirements: initial repetitive inspections, immediate repairs, and separate terminating modification tasks","Varied and overlapping compliance deadlines (90 days; intervals ≤10,000 hours TIS; within 48 months; and ‘before further flight’ for repairs)","References to several Boeing Service Bulletins and Alert Service Bulletins that prescribe the technical procedures","Applicability restricted to a subset of line numbers and to aeroplanes with Rolls‑Royce engines, requiring fleet‑level tracking","Tasks are technical and safety‑critical (electrical arcing, conduit replacement, hydraulic line replacement, pressurisation and leak checks)","Termination provisions that change ongoing inspection burden once modifications are installed","Cross‑reference to FAA AD creates an international regulatory coordination element"],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 747-400/‑400F aeroplanes (line numbers 696–1310) with Rolls‑Royce engines to inspect IDG power‑feeder cables, conduits and adjacent hydraulic lines, repair any damage found, and ultimately install replacement shield/bracket assemblies and new hydraulic lines that end the repeated inspections (see Requirements and Boeing Service Bulletins). Operators pay for inspections, repairs and parts; CASA sets timing (90 days/10,000 TIS/48 months) and requires repairs before further flight, changing routine maintenance tasks and recordkeeping obligations."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original scope as a targeted safety intervention for specific Boeing 747 aircraft with identified unsafe conditions. The document reflects the standard structure of CASA ADs with applicability, requirements, compliance, and background sections. There is no evidence of scope creep; the directive addresses the specific electrical and hydraulic safety issues in engine struts as originally intended."},"complexity_factors":["Multiple interdependent requirements (7 distinct numbered requirements with cross-references between them)","Conditional termination logic (Requirements 5-6 terminate Requirement 1; Requirement 7 terminates Requirement 3)","Multiple compliance timelines (90 days, 10,000 hours intervals, 48 months, 'before further flight')","Technical aviation terminology requiring external document references (Boeing Service Bulletins SB 747-24A2240, ASB 747-24A2247, SB 747-24A2242, ASB 747-24A2243)","Specific applicability criteria combining model, line number range, and engine type","Embedded definition of 'general visual inspection' (Note 1) with detailed procedural requirements","Reference to foreign regulatory instrument (FAA AD 2004-11-03 Amdt 39-13648 in Note 2)"],"plain_english_summary":"CASA orders operators of Boeing 747‑400/747‑400F (line numbers 696–1310) with Rolls‑Royce engines to inspect and repair electrical cables and hydraulic lines in engine struts to prevent arcing, fire, and hydraulic leaks. Mandatory visual inspections every 10,000 flight hours with repair before flight are required, and operators must install protective brackets/shields and replacement hydraulic lines within four years; after those permanent modifications the repetitive inspections can cease."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-307-integrated-drive-generator-power-feeder-cables","history":"/api/acts/ad-b747-307-integrated-drive-generator-power-feeder-cables/history","analysis":"/api/acts/ad-b747-307-integrated-drive-generator-power-feeder-cables/analysis","conflicts":"/api/acts/ad-b747-307-integrated-drive-generator-power-feeder-cables/conflicts","importantCases":"/api/acts/ad-b747-307-integrated-drive-generator-power-feeder-cables/important-cases","documents":"/api/acts/ad-b747-307-integrated-drive-generator-power-feeder-cables/documents"}}