{"id":"F2005L00619","name":"AD/S-62/10 Amdt 1 - Main Gearbox Input Shaft and Gear Assembly","slug":"ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":112891,"registerId":"commonwealth-F2005L00619-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Sikorsky S-62 Series Helicopters","sectionType":"division","heading":"Sikorsky S-62 Series Helicopters","content":"### Sikorsky S-62 Series Helicopters\n\n| AD/S-62/10 Amdt 1 | Main Gearbox Input Shaft and Gear Assembly | 4/2005 |\n| ----------------- | ------------------------------------------ | ------ |\n\n| Applicability: | All Model S62A and S62B Helicopters fitted with Main Gearboxes (MGB) part number (P/N) 6235-20000-3 through -10 inclusive.                                                                                                                                                                                                                                                     |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Inspect the input shaft helical gears, P/N S6235-20158 in accordance with Sikorsky Aircraft Service Bulletin No. 62B35-6.Note: FAA AD 63-17-06 refers.                                                                                                                                                                                                                         |\n| Compliance:    | Within 250 flight hours from the previous inspection and thereafter at intervals not to exceed 250 flight hours.                                                                                                                                                                                                                                                               |\n|                | This Amendment becomes effective on 14 April 2005.                                                                                                                                                                                                                                                                                                                             |\n| Background:    | This Directive requires an inspection of the MGB input shaft and gear assembly for possible rotational play between the splines on the shaft and the splines on the gear, and loss of torque on the nut securing the gears to the shaft.The amendment reissues the Directive with no change to the technical content.The original issue of this Directive became 31 July 1987. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n3 March 2005","sortOrder":0},{"sectionNumber":"AD/S-62/10 Amdt 1","sectionType":"part","heading":"AD/S-62/10 Amdt 1","content":"## AD/S-62/10 Amdt 1","sortOrder":1},{"sectionNumber":"Main Gearbox Input Shaft and Gear Assemb","sectionType":"part","heading":"Main Gearbox Input Shaft and Gear Assembly","content":"## Main Gearbox Input Shaft and Gear Assembly","sortOrder":2},{"sectionNumber":"4/2005","sectionType":"part","heading":"4/2005","content":"## 4/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward reissue of a 1987 directive with no change to technical content. The scope remains exactly as originally intended — safety inspection of specific helicopter gearbox components."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined technical terms (P/N for part number, MGB for Main Gearbox)","Single, clear compliance requirement with straightforward time interval","No cross-references to other legislation beyond a non-binding note about a US FAA directive","No conditional logic or exceptions — applies to all listed aircraft uniformly","Simple tabular format with clear applicability and requirement sections"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of the main gearbox input shaft and gear assembly on Sikorsky S‑62A/B helicopters (gearbox serials 6235‑20000‑3 through ‑10) to detect rotational play or loose nuts, using Sikorsky’s service bulletin. Owners/operators must inspect within 250 flight hours and repeat every 250 hours. Effective 14 April 2005; this reissues the 1987 AD without technical change."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The amendment reissues the original directive without changing the technical requirements. The directive continues to require the same inspections (original issue dated 31 July 1987; this amendment effective 14 April 2005) and does not expand or narrow applicability or inspection content (Background)."},"complexity_factors":["Narrow applicability: limited to S-62A and S-62B with MGB P/N 6235-20000-3 through -10 (Applicability)","Specific part-level inspection: targets helical gear P/N S6235-20158 and spline/torque conditions (Requirement, Background)","Recurring compliance interval: inspection every 250 flight hours from last inspection (Compliance)","Dependence on external technical document: directs compliance with Sikorsky Service Bulletin No. 62B35-6 (Requirement)","Cross-reference to FAA AD (note in Requirement) increases inter-jurisdictional traceability","Regulatory reissue with no technical change: administrative continuity rather than substantive amendment (Background)"],"plain_english_summary":"Requires operators of Sikorsky S‑62A and S‑62B helicopters fitted with main gearboxes P/N 6235-20000-3 through -10 to inspect the main gearbox input shaft helical gear (P/N S6235-20158) for spline play and loss of nut torque, following Sikorsky Service Bulletin No. 62B35-6. The Civil Aviation Safety Authority mandates the check within 250 flight hours of the previous inspection and every 250 hours thereafter. Operators/maintenance organisations pay for and schedule the inspections to remain compliant."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly","history":"/api/acts/ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly/history","analysis":"/api/acts/ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly/analysis","conflicts":"/api/acts/ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly/conflicts","importantCases":"/api/acts/ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly/important-cases","documents":"/api/acts/ad-s-62-10-amdt-1-main-gearbox-input-shaft-and-gear-assembly/documents"}}