{"id":"F2006B03536","name":"AD/BAe 146/89 - Vickers Standby Generator","slug":"ad-bae-146-89-vickers-standby-generator","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43103,"registerId":"commonwealth-F2006B03536-current","compilationNumber":null,"startDate":"2026-04-01","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 BAe 146 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BAe 146/89 Vickers Standby Generator ","sectionType":"part","heading":"AD/BAe 146/89 Vickers Standby Generator 7/2001","content":"# AD/BAe 146/89 Vickers Standby Generator 7/2001\n\nApplicability: All BAe 146 100, 200 and 300 series aeroplane and all Avro 146-RJ70, RJ85 and RJ100 series aeroplanes with Modification HCM01059A incorporated.\n\nRequirement: Incorporate Modification HCM01691A in accordance with BAe Systems (Operations) Limited Service Bulletin SB.24-137-01691A dated 12 April 2001.\n\nNote: This Service Bulletin has been classified as Mandatory by the CAA(UK).\n\nCompliance: Before 31 December 2004.\n\nThis Airworthiness Directive becomes effective on 12 July 2001.\n\nBackground: BAe has reported that the composite armature banding rings on the standby generator have been found to delaminate after prolonged operation at high temperature.\n\nVickers, the standby generator manufacturer, has introduced a replacement generator with banding rings manufactured from titanium.\n\nThis Directive requires incorporation of Modification HCM01691A which replaces standby generator part number (P/N) 520829 with P/N 3022049-000.\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 21 May 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 13 June 2001.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument confines its effect to the specified aeroplane models with Modification HCM01059A and mandates incorporation of Modification HCM01691A to replace P/N 520829 with P/N 3022049‑000. The text provides no indication that the AD's scope was broadened or narrowed from its original corrective purpose."},"complexity_factors":["Narrow technical scope: single component (standby generator) and single remedy (Mod HCM01691A / P/N swap).","Clear applicability limited to BAe 146/Avro 146‑RJ series with Modification HCM01059A, reducing ambiguity.","External cross‑reference to manufacturer Service Bulletin SB.24‑137‑01691A (classified Mandatory by CAA(UK)) creates reliance on non‑statutory documentation for implementation details.","Fixed compliance deadline (before 31 December 2004) imposes scheduling and logistics demands on operators.","Parts procurement and installation lead times, certification of replacement parts and potential aircraft downtime add operational and commercial complexity.","Limited operator discretion: AD mandates a specific part number replacement and modification, leaving little alternative remedy."],"plain_english_summary":"This Airworthiness Directive requires operators of BAe 146 and Avro 146‑RJ series aeroplanes (with Modification HCM01059A) to replace the standby generator (P/N 520829 → P/N 3022049‑000) by incorporating Modification HCM01691A in accordance with BAe Service Bulletin SB.24‑137‑01691A, to be completed before 31 December 2004. It responds to reported delamination of composite armature banding rings and shifts purchase, maintenance scheduling and installation costs and operational downtime to aircraft operators (Requirement, Compliance, Background)."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific unsafe condition in a specific aircraft component. It has not expanded beyond the original safety purpose of replacing delaminating generator banding rings."},"complexity_factors":["Single, specific technical requirement with clear part number replacement","Limited applicability — only affects aircraft with one specific prior modification (HCM01059A)","No nested exceptions or conditional logic","Single compliance deadline with no alternative methods","Only 2 defined technical terms (part numbers) in the operative section","No cross-references to other legislation or regulations beyond the enabling provision (subregulation 39.1(1) of CAR 1998)"],"plain_english_summary":"This CASA Airworthiness Directive mandates replacement of a faulty standby generator on BAe 146 and Avro 146‑RJ series aircraft that have Modification HCM01059A, because the original generator’s composite banding rings can delaminate and cause generator failure. Operators must fit the specified replacement generator (P/N 3022049‑000) per the manufacturer’s service bulletin before 31 December 2004 to maintain required emergency electrical backup and safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bae-146-89-vickers-standby-generator","history":"/api/acts/ad-bae-146-89-vickers-standby-generator/history","analysis":"/api/acts/ad-bae-146-89-vickers-standby-generator/analysis","conflicts":"/api/acts/ad-bae-146-89-vickers-standby-generator/conflicts","importantCases":"/api/acts/ad-bae-146-89-vickers-standby-generator/important-cases","documents":"/api/acts/ad-bae-146-89-vickers-standby-generator/documents"}}