{"id":"F2006B10041","name":"AD/G1159/38 - Electrical Power - Alternator Feeder Cable","slug":"ad-g1159-38-electrical-power-alternator-feeder-cable","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":55461,"registerId":"commonwealth-F2006B10041-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.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.","sortOrder":0},{"sectionNumber":"AD/G1159/38 Electrical Power - Alternato","sectionType":"part","heading":"AD/G1159/38 Electrical Power - Alternator Feeder Cable 7/2000","content":"# AD/G1159/38 Electrical Power \\- Alternator Feeder Cable 7/2000\n\nApplicability: Model G-IV series aeroplanes, serial numbers 1000 through 1404 inclusive. Requirement: Modify the engine alternator feeder cables in accordance with Gulfstream IV\n\nCustomer Bulletin No. 112, dated 15 February 2000, and Gulfstream IV Aircraft\n\nService Change (ASC) No. 410, dated 11 February 2000 as follows:\n\n    For aeroplanes having serial numbers 1000 through 1384 inclusive - Accomplish sub paragraphs a.(i) and a.(ii) of this Directive for the left and right engines, in accordance with Paragraphs B. and C. of the Modification Instructions of the ASC.\n\n    (i) Replace the alternator power feeder cables with new cables, and reroute the cables.\n\n    (ii) Install additional brackets and clamps.\n\n    b. For aeroplanes having serial numbers 1385 through 1404 inclusive - Accomplish sub paragraphs b.(i) and b.(ii) of this Directive on the right engine in accordance with paragraph D. of the Modification Instructions of the ASC.\n\n    (i) Install a bracket and spacer.\n\n    (ii) Reroute the alternator feeder cables.\n\nNote 1: On some aeroplanes, some of the actions described in the aircraft service change were accomplished prior to the effective date of this Directive. On these aeroplanes, these actions are not required to be repeated. However, any action described in the aircraft service change that has not been accomplished on these aeroplanes must be accomplished in accordance with this requirement.\n\nNote 2: FAA AD 2000-07-25 Amdt 39-11680 refers.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD remains narrowly focused on correcting an identified unsafe condition related to alternator feeder cables on specific Gulfstream G‑IV serial numbers. It mandates targeted physical modifications (wire replacement, rerouting, brackets/clamps/spacers) and acknowledges prior completions. There is no evidence in the text provided that the directive expands beyond that original safety purpose or adds unrelated obligations."},"complexity_factors":["Short, focused directive (single technical issue) which lowers complexity","Two serial‑number ranges with different required actions (1000–1384 vs 1385–1404)","Requirement depends on following external technical documents (Gulfstream Customer Bulletin No.112 and ASC No.410)","Conditional exception for work already completed (Note 1) requires record checks","Cross‑reference to an FAA AD (Note 2) meaning operators may need to reconcile multiple regulators' requirements","Absence of the compliance‑timing text in the excerpt adds some practical ambiguity that operators must resolve in the full AD"],"plain_english_summary":"**What this directive does (in one line)**\n\n- This Airworthiness Directive (AD) requires specific physical modifications to the alternator power feeder cables on Gulfstream G‑IV series aeroplanes with serial numbers 1000–1404. (An AD is a mandatory safety instruction issued by the regulator.)\n\n**Who it affects**\n\n- Aircraft owners and operators of Gulfstream G‑IV aeroplanes with serial numbers 1000 through 1404.\n- Maintenance organisations and technicians who perform scheduled or corrective maintenance on those aeroplanes.\n\n**What must be done (mechanically)**\n\n- For aeroplanes with serial numbers 1000–1384 inclusive: for both left and right engines, operators must (1) replace the alternator power feeder cables with new cables and reroute them, and (2) install additional brackets and clamps. These actions must follow Gulfstream IV Customer Bulletin No. 112 (15 February 2000) and Gulfstream IV Aircraft Service Change (ASC) No. 410 (11 February 2000) (see Requirement, subparagraph a.(i)–a.(ii)).\n- For aeroplanes with serial numbers 1385–1404 inclusive: on the right engine only, operators must (1) install a bracket and spacer and (2) reroute the alternator feeder cables, per paragraph D of the ASC (Requirement, subparagraph b.(i)–b.(ii)).\n- If any of the actions were already completed before the AD took effect, those specific actions do not need to be repeated; any remaining uncompleted actions must be done (Note 1).\n- The AD also cross‑references FAA AD 2000‑07‑25 (Note 2).\n\n**Why the regulator issued this (stated purpose) and what that implies**\n\n- The AD is issued because the regulator (CASA) has identified an \"unsafe condition\" related to the alternator feeder cables and considers the listed modifications necessary to correct it (preamble statement). The AD itself does not set out the detailed technical hazard in this excerpt, but the required measures (replace cables, reroute them, and add brackets/clamps/spacers) are measures typically aimed at preventing cable chafing, electrical faults, or mechanical damage that could lead to alternator failure or secondary damage.\n\n**Practical effects, costs and compliance mechanics**\n\n- Who pays: Aircraft owners/operators pay for parts, labour and aircraft downtime required to carry out the modifications.\n- Work and downtime: The required actions involve part replacement and structural/placement work on the engine nacelle/compartment; this requires certified maintenance facilities and will take maintenance time and scheduling. The AD directs compliance to be done in accordance with the Gulfstream service documents, so operators must obtain those documents and follow their procedures.\n- Documentation and verification: Operators must check maintenance records to determine whether the service change actions were already performed (per Note 1). Where actions are outstanding, they must be performed and recorded as required by regulatory maintenance practices.\n- Supply and implementation risk: Compliance depends on availability of the specified replacement cables, brackets and spacers and on access to the aircraft (eg. scheduling during maintenance checks). Following OEM instructions reduces ambiguity but requires operators to obtain the referenced Gulfstream documents.\n- Regulatory interaction: The AD cross‑references a corresponding FAA AD, so operators with international operations or maintenance bases will likely coordinate compliance with both regulators' requirements and with Gulfstream's service instructions.\n\n**Effects on private choice and market participants**\n\n- Maintenance providers: The AD creates work demand for MROs familiar with Gulfstream G‑IV modifications; work is concentrated among operators of affected serial numbers.\n- Competitive effects: The measure prescribes specific manufacturer documents as the method of compliance, so compliance work will generally follow Gulfstream's specified parts and procedures rather than allowing broad alternative solutions unless specifically accepted by the regulator.\n- No direct changes to ownership, operating permissions or commercial rules are included; the AD simply imposes a maintenance obligation tied to airworthiness.\n\n**Where to look and next steps for an operator**\n\n- Check each aircraft's serial number (Applicability) and maintenance records for prior accomplishment (Note 1).\n- Obtain Gulfstream IV Customer Bulletin No. 112 and ASC No. 410 and follow the Modification Instructions referenced (Requirement).\n- Coordinate scheduling, parts procurement, and certifying maintenance release with your authorised maintenance organisation.\n\n(References in the AD excerpt: Applicability; Requirement, subparagraphs a.(i)–a.(ii) and b.(i)–b.(ii); Note 1; Note 2.)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific safety defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating cable modifications."},"complexity_factors":["Short, single-purpose directive focused on one specific mechanical modification","Only 2 defined serial number ranges with distinct but straightforward requirements","Minimal cross-referencing — only references to 2 manufacturer documents (Gulfstream Customer Bulletin No. 112 and ASC No. 410) and 1 related FAA directive","Simple conditional logic (if serial number X, do action Y)","No nested exceptions or complex interpretation sections","Clear compliance structure: applicability, requirement, and notes sections"],"plain_english_summary":"This AD mandates modification and rerouting of alternator feeder cables on Gulfstream G‑IV jets (S/N 1000–1404), with different actions by serial range: earlier aircraft require replacement/reroute on both engines plus added brackets/clamps, while later aircraft require right‑engine bracket/spacer and reroute. It addresses unsafe feeder installations that could cause electrical failures.\n\nWork must follow Gulfstream technical bulletins and aligns with FAA AD 2000‑07‑25; previously completed applicable work need not be repeated."},"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-g1159-38-electrical-power-alternator-feeder-cable","history":"/api/acts/ad-g1159-38-electrical-power-alternator-feeder-cable/history","analysis":"/api/acts/ad-g1159-38-electrical-power-alternator-feeder-cable/analysis","conflicts":"/api/acts/ad-g1159-38-electrical-power-alternator-feeder-cable/conflicts","importantCases":"/api/acts/ad-g1159-38-electrical-power-alternator-feeder-cable/important-cases","documents":"/api/acts/ad-g1159-38-electrical-power-alternator-feeder-cable/documents"}}