{"id":"F2006B06744","name":"AD/S-76/68 - Landing Gear Parts Life Limit","slug":"ad-s-76-68-landing-gear-parts-life-limit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114571,"registerId":"commonwealth-F2006B06744-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.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\nSikorsky S-76 Series Helicopters","sortOrder":0},{"sectionNumber":"AD/S-76/68 Landing Gear Parts Life Limit","sectionType":"part","heading":"AD/S-76/68 Landing Gear Parts Life Limit 6/2002","content":"# AD/S-76/68 Landing Gear Parts Life Limit 6/2002\n\nApplicability: All Model S-76A helicopters.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 2002-05-06 Amdt 39-12674.\n\nCompliance: As specified in the Requirement document, with a revised effective date of 13 June 2002.\n\nThis Airworthiness Directive becomes effective on 13 June 2002.\n\nBackground: The FAA AD requirement revises the Limitations Section of the S-76A maintenance manual by establishing or revising the retirement lives for the affected parts shown in Tables 1 and 2 of the Requirement document, and establishing cycle counting as an additional method to determine retirement for the affected parts. AD/S-76/8 specifies other component retirement lives as required by the referenced Sikorsky publications.\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 18 April 2002\n\n![](image.001.png)","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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The AD changes the existing maintenance limitations: it revises or establishes retirement lives for specified landing‑gear parts and adds cycle counting as an additional retirement‑determination method (Background). That alters scope from prior instructions by changing which parts and what tracking method determine retirement (Requirement; Background)."},"complexity_factors":["External cross‑reference: mandatory compliance is framed by FAA AD 2002-05-06 rather than reproducing full technical detail (Requirement).","Technical specificity omitted from this instrument: retirement lives and affected part lists are contained in Tables 1 and 2 of the referenced document (Background).","Introduction of a new tracking method (cycle counting) increases operational record‑keeping and monitoring requirements (Background).","Applicability to an entire model fleet (all S‑76A) concentrates compliance across operators rather than individual aircraft.","Revised effective date changes timing for implementation and fleet scheduling (Compliance).","Complementary cross‑reference to AD/S-76/8 for other component retirement lives creates multiple interdependent directives (Background)."],"plain_english_summary":"This Airworthiness Directive applies to all Sikorsky S‑76A helicopters and requires operators to follow FAA AD 2002-05-06 as the technical requirement, effective 13 June 2002. It updates the S‑76A maintenance manual by setting or revising retirement lives for certain landing‑gear parts and adding cycle counting as a retirement method. Mechanically, owners/operators must change how and when they retire and replace specified parts; the operator bears replacement and record‑keeping costs while CASA enforces compliance."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: establishing life limits for specific landing gear parts on one helicopter model. It references an external FAA directive rather than expanding into new regulatory territory."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined applicability criterion (Model S-76A helicopters)","Single requirement: comply with external FAA document","No nested conditions or exceptions","No cross-references to other Australian legislation beyond basic enabling power (CAR 1998 subreg 39.1(1))","Background section provides clear rationale without legal complexity"],"plain_english_summary":"This Airworthiness Directive mandates that all Sikorsky S-76A helicopters in Australia comply with FAA AD 2002-05-06. It requires updating maintenance instructions to impose strict retirement limits and to use cycle counting for landing gear components.\n\nThe rule affects all S-76A operators (e.g., emergency services, offshore transport, charters) to prevent fatigue-related gear failures by replacing parts before they become unsafe. It took effect 13 June 2002."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-76-68-landing-gear-parts-life-limit","history":"/api/acts/ad-s-76-68-landing-gear-parts-life-limit/history","analysis":"/api/acts/ad-s-76-68-landing-gear-parts-life-limit/analysis","conflicts":"/api/acts/ad-s-76-68-landing-gear-parts-life-limit/conflicts","importantCases":"/api/acts/ad-s-76-68-landing-gear-parts-life-limit/important-cases","documents":"/api/acts/ad-s-76-68-landing-gear-parts-life-limit/documents"}}