{"id":"F2006B10587","name":"AD/HU 269/110 Amdt 1 - Tail Rotor Fork Bolt","slug":"ad-hu-269-110-amdt-1-tail-rotor-fork-bolt","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116437,"registerId":"commonwealth-F2006B10587-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HU 269/110 Amdt 1 - Tail Rotor Fork Bolt","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety 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\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/HU 269/110 and issues the following AD under subregulation 39.1 (1) of CASR 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\n![](image.001.png)  \n\nSchweizer (Hughes) 269 Series Helicopters\n\nAD/HU 269/110\n\nAmdt 1\n\n  \nTail Rotor Fork Bolt 7/2003\n\nApplicability: All Schweizer (Hughes) 269 series helicopters.\n\nRequirement: Remove the tail rotor fork bolt and replace with a new (zero time) bolt P/N 269A6092-3, P/N 369A1602-3 or P/N 6092-3 in accordance with Schweizer SB\n\nB-269 Revision 1. Inspect the removed bolt for excessive wear, gouges, scoring or cracks. Do not re- use any removed bolts. If any cracks are found, report them to CASA by defect report and retain the bolt for later analysis.\n\nIf a tail rotor strike occurs during service, the tail rotor fork bolt must be removed and replaced with a new (zero time) bolt.\n\nCompliance: Within 100 hours time in Service after 1 August 2002 and thereafter at 1200 hour intervals.\n\nThis Amendment becomes effective on 10 July 2003.\n\nBackground: A recent incident occurred where severe tail rotor vibration was encountered. The cause was found to be a broken tail rotor fork bolt. On investigation, the bolt was found to have suffered a corrosion related fatigue failure, which was not detectable during normal visual inspection of the tail rotor hub. Examination of a second bolt removed from another aircraft revealed severe fretting and corrosion. Tail rotor fork bolt failure may result in loss of the tail rotor during flight.\n\nThis amendment allows the use of any of three different part number bolts, when replacing the tail rotor fork bolt. It also updates the revision status of the requirement document. There is no change to the compliance.\n\nThe original issue of this Airworthiness Directive became effective on 17 July 2002.\n\n![](image.002.jpeg)  \n\nDavid Villiers\n\n![](image.001.png)Delegate of the Civil Aviation Safety Authority 20 May 2003\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 18 June 2003.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment stays strictly within the original scope of addressing tail rotor fork bolt safety. The changes are minimal: expanding the approved replacement bolt part numbers from presumably one to three options, and updating the service bulletin reference to Revision 1. The CASA delegate explicitly states 'There is no change to the compliance.' The scope has not expanded beyond the original safety intent."},"complexity_factors":["Single, clearly defined applicability (one helicopter series)","Straightforward requirement: remove and replace bolt, inspect old one, don't reuse","Simple compliance timeline (100 hours initially, then 1200 hour intervals)","Only 3 defined part numbers for replacement","No cross-references to other legislation beyond the enabling regulation (CASR 1998)","Single amendment with explicit statement that compliance timing unchanged","Background section provides clear safety rationale in plain language"],"plain_english_summary":"This CASA Airworthiness Directive applies to all Schweizer (Hughes) 269 series helicopters and requires replacement of the tail-rotor fork bolt with an approved new part, inspection (but no reuse) of removed bolts, immediate reporting and retention if cracks are found, and immediate replacement after any tail-rotor strike. \n\nIt matters because hidden corrosion/fatigue led to a bolt failure and potential loss of control; Amendment 1 simply expands the approved replacement parts list and updates references without changing compliance timing."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment broadens acceptable replacement parts by allowing three specified part numbers and updates the referenced service bulletin revision. It does not change the compliance deadlines or the core requirement to replace and inspect bolts; operational scope of who must comply remains the same."},"complexity_factors":["Multiple mandatory actions (replace bolt, inspect removed bolt, do not reuse, report cracks) — (Requirement).","Fixed compliance timing with an initial short window and long recurring intervals (within 100 hours; thereafter 1200 hour intervals) — (Compliance).","Applicability to an entire aircraft series (all Schweizer/Hughes 269 helicopters) increases operational reach — (Applicability).","Permits alternative part numbers (three P/Ns) and requires following a specific service bulletin revision — coordination with parts supply and SB compliance required — (Requirement).","Reporting obligation to CASA and retention for analysis if cracks found adds administrative burden and potential downtime — (Requirement / Background).","Mandatory replacement after any tail-rotor strike creates a conditional trigger for immediate action.","Underlying failure mode (corrosion-related fatigue not detectable by normal visual inspection) implies reliance on forced replacement rather than inspections — (Background)."],"plain_english_summary":"This amendment requires owners/operators of all Schweizer (Hughes) 269 helicopters to replace the tail-rotor fork bolt with a new (zero-time) specified part within 100 flight hours from 1 Aug 2002, then at 1200‑hour intervals, and after any tail-rotor strike. Removed bolts must be inspected, not reused, and cracked bolts reported to CASA. The change permits three alternative part numbers and updates the service bulletin revision; the compliance timing remains unchanged."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-269-110-amdt-1-tail-rotor-fork-bolt","history":"/api/acts/ad-hu-269-110-amdt-1-tail-rotor-fork-bolt/history","analysis":"/api/acts/ad-hu-269-110-amdt-1-tail-rotor-fork-bolt/analysis","conflicts":"/api/acts/ad-hu-269-110-amdt-1-tail-rotor-fork-bolt/conflicts","importantCases":"/api/acts/ad-hu-269-110-amdt-1-tail-rotor-fork-bolt/important-cases","documents":"/api/acts/ad-hu-269-110-amdt-1-tail-rotor-fork-bolt/documents"}}