{"id":"F2006B06907","name":"AD/SD3-60/60 - Elevator Torque Shaft Assembly Bearing Housings","slug":"ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114787,"registerId":"commonwealth-F2006B06907-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/60 - Elevator Torque Shaft Assembly Bearing Housings","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 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\nShorts SD3-60 Series Aeroplanes\n\nAD/SD3-60/60 Elevator Torque Shaft Assembly Bearing\n\nHousings\n\n  \n10/2001\n\nApplicability: All SD3-60 aircraft.\n\nRequirement: Inspect in accordance with Shorts Mandatory Service Bulletin SD360-27-31.\n\nNote: UK CAA AD 009-05-2001 refers.\n\nCompliance: Before 4 December 2001, unless already accomplished; thereafter in accordance with Aircraft Maintenance Programme section 5-25-27.\n\nThis Airworthiness Directive becomes effective on 4 October 2001.\n\nBackground: An operator report was received of “free play” found in the elevator torque shaft assembly bearing housings at frame Stn. 74. Investigation determined that incorrect installation of the housings was the cause.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 22 August 2001\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 12 September 2001.\n\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":false,"description":"The AD's scope aligns with its stated purpose: to address incorrect installation causing free play in the elevator torque shaft bearing housings on SD3-60 aircraft. It mandates inspection and incorporation into the maintenance programme but does not broaden applicability or introduce additional regulatory functions beyond inspection and remediation as referenced in the service bulletin."},"complexity_factors":["Technical specificity: targets elevator torque shaft assembly bearing housings at frame station 74 (aviation-technical term).","Normative cross-reference: requires compliance with Shorts Mandatory Service Bulletin SD360-27-31 rather than prescribing remedial steps in the AD itself.","Compliance timing: an initial hard deadline (before 4 December 2001) plus ongoing incorporation into the Aircraft Maintenance Programme (section 5-25-27).","Applicability: covers all SD3-60 aircraft, creating fleet-wide inspection obligation.","Regulatory basis: issued under CAR 1998 subregulation 39.1(1) (delegated CASA decision and legal enforceability).","External reference: notes UK CAA AD 009-05-2001, implicating parallel foreign airworthiness action.","Implementation burden: inspection and any corrective work costs fall to operators; maintenance scheduling and record-keeping required.","Information locus: investigative cause and corrective instructions sit partly in operator report and the referenced service bulletin, which may require obtaining and following manufacturer content."],"plain_english_summary":"Requires owners/operators of all Shorts SD3‑60 aeroplanes to inspect the elevator torque shaft assembly bearing housings at frame station 74 in accordance with Shorts Mandatory Service Bulletin SD360‑27‑31. CASA issued the directive after a report of “free play” caused by incorrect installation; compliance is due before 4 December 2001 (unless already done) and then as part of the Aircraft Maintenance Programme. Operators bear the inspection and any corrective costs and must schedule the checks into ongoing maintenance."},"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 type. It has not expanded beyond the original safety issue of incorrectly installed elevator bearing housings."},"complexity_factors":["Single, specific mechanical component targeted (elevator torque shaft assembly bearing housings)","No defined terms section — all terminology is standard aviation maintenance language","Single cross-reference to UK CAA AD 009-05-2001 (informational only)","Simple conditional structure: one applicability category, one requirement, one compliance deadline","No nested exceptions or conditional logic","One page in length with clear section headers","Relies on external technical document (Shorts Mandatory Service Bulletin) for actual inspection procedures, keeping the AD itself brief"],"plain_english_summary":"This CASA safety order mandates owners and operators of Shorts SD3-60 turboprops inspect the elevator torque shaft bearing housings per Shorts Mandatory Service Bulletin SD360-27-31. It follows discovery of “free play” from incorrect installation that could impair elevator control.\n\nThe initial inspection is required before 4 December 2001 (if not already done), with ongoing checks incorporated into the aircraft maintenance programme to prevent potential loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings","history":"/api/acts/ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings/history","analysis":"/api/acts/ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings/analysis","conflicts":"/api/acts/ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings/conflicts","importantCases":"/api/acts/ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings/important-cases","documents":"/api/acts/ad-sd3-60-60-elevator-torque-shaft-assembly-bearing-housings/documents"}}