{"id":"F2006B10562","name":"AD/HS 748/27 - Elevator Primary Stop Lever","slug":"ad-hs-748-27-elevator-primary-stop-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116387,"registerId":"commonwealth-F2006B10562-current","compilationNumber":null,"startDate":"2026-04-03","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/HS 748/27 Elevator Primary Stop Lever","sectionType":"part","heading":"AD/HS 748/27 Elevator Primary Stop Lever 4/2000","content":"# AD/HS 748/27 Elevator Primary Stop Lever 4/2000\n\nApplicability: All HS748 series aircraft.\n\nRequirement: Action in accordance with BAe Regional Aircraft Mandatory Service Bulletin HS748-27-125 Revision 1.\n\nNote: Modification No. 7669 refers.\n\nCompliance: Before 31 January 2001.\n\nThis Airworthiness Directive becomes effective on 20 April 2000.\n\nBackground: Following an incident report of a flying control restriction, a zonal survey was carried out by the manufacturer and an area of potential restriction identified. This Directive requires modification of the elevator primary stop lever under the flight deck floor, as a potential foreign object hazard exists.\n\n![](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 9 March 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 22 March 2000.","sortOrder":1}],"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific mechanical safety issue on a specific aircraft type. It has not expanded beyond its original purpose of mandating a safety modification to prevent elevator control restriction."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined term implicitly referenced (the Service Bulletin)","No cross-references to other legislation beyond the enabling regulation (CAR 1998 subregulation 39.1(1))","Simple conditional structure: single applicability criterion (all HS748 series), single requirement, single compliance deadline","No nested exceptions or conditional logic","Self-contained — all necessary information included without external statutory interpretation required"],"plain_english_summary":"This Airworthiness Directive orders all HS748 series aircraft owners/operators to modify the elevator primary stop lever (under the flight deck) to prevent foreign-object blockage that could restrict elevator travel and impair pitch control. Compliance must follow British Aerospace Service Bulletin HS748-27-125 Revision 1 and be completed by 31 January 2001; the directive became effective 20 April 2000. This affects all Australian operators, owners and maintainers of HS748s."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD’s scope is confined to correcting the unsafe condition identified by the manufacturer's zonal survey: modification of the elevator primary stop lever on HS748 aircraft. It does not broaden applicability beyond the HS748 series, nor introduce ongoing or recurring obligations beyond completing the specified modification by the compliance date (Applicability; Requirement; Background; Compliance)."},"complexity_factors":["Narrow applicability: applies to 'All HS748 series aircraft' (Applicability).","Single, discrete action required: modification per BAe Mandatory Service Bulletin HS748-27-125 Revision 1 (Requirement).","Fixed compliance deadline: 'Before 31 January 2001' (Compliance).","Regulatory basis explicitly stated: issued by CASA delegate under subregulation 39.1(1) of CAR 1998 (preamble).","Reference to a specific modification identifier: 'Modification No. 7669' (Note), reducing ambiguity about the work required.","Safety rationale is specific and limited: response to a flying control restriction and a zonal survey identifying a potential foreign‑object hazard beneath the flight deck (Background).","Administrative dates provided (effective date 20 April 2000 and Gazette notice 22 March 2000), clarifying timing and formalisation of the requirement."],"plain_english_summary":"This directive orders all HS748 series aircraft to have the elevator primary stop lever modified in accordance with BAe Mandatory Service Bulletin HS748-27-125 Revision 1 (Modification No. 7669) to remove a potential foreign‑object hazard beneath the flight‑deck floor. The work must be done before 31 January 2001. It affects HS748 operators/owners, who must carry out the specified modification to comply with CASA’s safety requirement issued under CAR 1998 subregulation 39.1(1)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-748-27-elevator-primary-stop-lever","history":"/api/acts/ad-hs-748-27-elevator-primary-stop-lever/history","analysis":"/api/acts/ad-hs-748-27-elevator-primary-stop-lever/analysis","conflicts":"/api/acts/ad-hs-748-27-elevator-primary-stop-lever/conflicts","importantCases":"/api/acts/ad-hs-748-27-elevator-primary-stop-lever/important-cases","documents":"/api/acts/ad-hs-748-27-elevator-primary-stop-lever/documents"}}