{"id":"F2006B03455","name":"AD/BAe 146/101 Amdt 1 - Digital Flight Guidance Computer","slug":"ad-bae-146-101-amdt-1-digital-flight-guidance-computer","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43009,"registerId":"commonwealth-F2006B03455-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BAe 146/101 Amdt 1 - Digital Flight Guidance Computer","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS 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 revokes Airworthiness Directive (AD) AD/BAe 146/101 and issues the following 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\n\nAD/BAe 146/101\n\nAmdt 1\n\n  \nDigital Flight Guidance Computer 2/2003\n\nApplicability: All Avro 146-RJ70, RJ85 and RJ100 series aeroplanes with modification HCM01080B and HCM01364D or HCM01364E or HCM01364F incorporated.\n\nRequirement: Modify the Digital Flight Guidance Computer (DFGC) system in accordance with BAe Systems (Operations) Ltd Modification Service Bulletin SB.22-068-70628B dated 4 November 2002.\n\nNote: This Modification Service Bulletin has been classified as Mandatory by the CAA(UK).\n\nCompliance: Before 1 May 2005.\n\nThis Amendment becomes effective on 20 February 2003.\n\nBackground: The original issue of this Directive introduced a new Honeywell DFGC incorporating changes to radio altitude monitoring and other system enhancements.\n\nThis Amendment corrects an anomaly in the Applicability Statement.\n\nThe original issue of this Airworthiness Directive became effective on 26 December 2002.\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 2 December 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 29 January 2003.\n\n  \nPage 1 of 1","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":3,"scope_assessment":{"changed":true,"description":"The Amendment \"corrects an anomaly in the Applicability Statement\" (Background), meaning the set of affected aeroplanes was clarified/altered from the original AD. Operators must rely on the amended applicability rather than the original issue (original AD effective 26 December 2002; this Amendment effective 20 February 2003)."},"complexity_factors":["Narrow, modification‑based applicability requires operators to check aircraft for specific mod status (Applicability).","Mandates an external manufacturer service bulletin as the method of compliance, requiring access to and adherence to that document (Requirement; Note).","Firm compliance deadline (before 1 May 2005) creates a temporal implementation constraint (Compliance).","Amendment corrected an applicability anomaly, so operators/maintainers must reconcile this AD with the original issue (Background).","Technical nature of the Digital Flight Guidance Computer modification implies specialised maintenance resources and potential scheduling/airworthiness planning (Requirement).","Reference to CAA(UK) classification may involve cross‑jurisdictional recognition or expectations (Note)."],"plain_english_summary":"This directive requires operators of Avro 146‑RJ70, RJ85 and RJ100 aeroplanes that have modifications HCM01080B and HCM01364D/E/F to modify the Digital Flight Guidance Computer according to BAe Systems Service Bulletin SB.22‑068‑70628B (Requirement; Applicability). Compliance must be completed before 1 May 2005. The modification work and any costs fall to aircraft operators who must follow the manufacturer’s instructions; the amendment corrects an earlier applicability anomaly (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment is a technical correction to the applicability statement only. It does not expand the scope beyond the original intent of ensuring flight guidance computer safety modifications on affected BAe 146 aircraft."},"complexity_factors":["Single, specific technical requirement with clear reference to manufacturer bulletin","Limited applicability — only three aircraft series with specific modification combinations","No nested exceptions or conditional logic","Straightforward compliance deadline","Only 4 defined elements (aircraft series, modification numbers, bulletin reference, deadline)","Short document (1 page) with clear structure: Applicability, Requirement, Compliance, Background"],"plain_english_summary":"This safety order replaces an earlier directive and requires owners/operators of Avro 146-RJ70, RJ85 and RJ100 aircraft—fitted with HCM01080B plus HCM01364D/E/F—to update the Digital Flight Guidance Computer per the BAe Systems technical bulletin. The UK regulator classifies the modification as mandatory due to its safety-critical role; operators must comply before 1 May 2005. This amendment corrects an error in the original order’s applicability statement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bae-146-101-amdt-1-digital-flight-guidance-computer","history":"/api/acts/ad-bae-146-101-amdt-1-digital-flight-guidance-computer/history","analysis":"/api/acts/ad-bae-146-101-amdt-1-digital-flight-guidance-computer/analysis","conflicts":"/api/acts/ad-bae-146-101-amdt-1-digital-flight-guidance-computer/conflicts","importantCases":"/api/acts/ad-bae-146-101-amdt-1-digital-flight-guidance-computer/important-cases","documents":"/api/acts/ad-bae-146-101-amdt-1-digital-flight-guidance-computer/documents"}}