{"id":"F2007L00749","name":"AD/ECUREUIL/8 Amdt 2 - Starflex Star to Main Rotor Shaft Securing Bolts","slug":"ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":64432,"registerId":"commonwealth-F2007L00749-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Eurocopter AS 350 (Ecureuil) Series Heli","sectionType":"division","heading":"Eurocopter AS 350 (Ecureuil) Series Helicopters","content":"### Eurocopter AS 350 (Ecureuil) Series Helicopters\n\n| AD/ECUREUIL/8 Amdt 2 | Starflex Star to Main RotorShaft Securing Bolts | 4/2007 |\n| -------------------- | ----------------------------------------------- | ------ |\n\n| Applicability: | All model AS 350 helicopters with P/N 350A37-1202-20 and 350A37-1224-20 Starflex star to main rotor shaft securing bolts fitted.                                                                                                                                                                                                                                                                                                                                                                                |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Aerospatiale AS 350 SB No 05.04 Revision 1.Note: Bureau Veritas Directive 80-184-015(B) R1 refers.                                                                                                                                                                                                                                                                                                                                                                                    |\n| Compliance:    | For aircraft which have achieved 590 hours time in service - within 10 hours time in service after 30 October 1980.For aircraft which have achieved 300 hours time in service - upon achieving 600 hours time in service.For all aircraft - at each subsequent 400 hours time in service after initial inspection in accordance with 1 and 2.                                                                                                                                                                   |\n|                | This Amendment becomes effective on 12 April 2007.                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| Background:    | Several cases of fretting corrosion, which can cause cracking, have resulted from loose Starflex star to main rotor shaft securing bolts.Amendment 1 extended the 300 hourly repetitive inspection period to 400 hours as specified by the manufacturer.This amendment is issued to change the applicability of the AD to refer to AS350 helicopters with specific bolt part numbers fitted. There is no change to the requirements or compliance.The original issue of this AD became effective in March 1988. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n28 February 2007","sortOrder":0},{"sectionNumber":"AD/ECUREUIL/8 Amdt 2","sectionType":"part","heading":"AD/ECUREUIL/8 Amdt 2","content":"## AD/ECUREUIL/8 Amdt 2","sortOrder":1},{"sectionNumber":"Starflex Star to Main RotorShaft Securin","sectionType":"part","heading":"Starflex Star to Main RotorShaft Securing Bolts","content":"## Starflex Star to Main Rotor  \nShaft Securing Bolts","sortOrder":2},{"sectionNumber":"4/2007","sectionType":"part","heading":"4/2007","content":"## 4/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment narrows the AD's scope to AS350 helicopters fitted with the two specific Starflex bolt part numbers listed. The technical requirements and compliance intervals remain unchanged from the prior amendment; only the applicability clause was modified."},"complexity_factors":["Narrow, part‑number‑based applicability (P/N 350A37-1202-20 and 350A37-1224-20) reduces population but requires accurate parts identification.","Routine, time‑based inspection schedule (initial at ~590/600 hours then every 400 hours) is simple but requires service‑time tracking and maintenance planning.","External normative references: Aerospatiale AS 350 SB No. 05.04 Rev 1 and mention of Bureau Veritas Directive 80-184-015(B) R1 introduce cross‑document compliance dependencies.","Repetitive inspection regime creates ongoing labour and parts‑replacement costs and recordkeeping obligations for operators.","Amendment changes only applicability (not the technical requirements), which can cause operator confusion about which AD version applies if records are incomplete."],"plain_english_summary":"This airworthiness directive requires operators of Eurocopter AS350 helicopters fitted with Starflex star‑to‑main‑rotor‑shaft bolts P/N 350A37‑1202‑20 or 350A37‑1224‑20 to carry out inspections and follow Aerospatiale AS 350 Service Bulletin No. 05.04 Rev 1 because fretting corrosion and loose bolts have caused cracking. Initial inspections are required at specified flight‑hour thresholds (around 590–600 hours) and then every 400 flight hours. Operators pay for inspections and any repairs; the regulator (CASA delegate) enforces the timetable and recordkeeping."},"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":3,"scope_assessment":{"changed":true,"description":"The original 1988 directive applied broadly to AS 350 helicopters. Amendment 1 (date unspecified) extended inspection intervals from 300 to 400 hours. Amendment 2 (2007) significantly narrowed the scope by restricting applicability to only those helicopters fitted with specific bolt part numbers (P/N 350A37-1202-20 and P/N 350A37-1224-20). This represents a refinement from universal application to targeted application based on component identification, reducing regulatory burden on operators with different bolt configurations while maintaining safety coverage for affected aircraft."},"complexity_factors":["Multiple overlapping compliance deadlines based on aircraft flight hours (three different triggering conditions)","Cross-reference to external technical document (Aerospatiale AS 350 Service Bulletin No 05.04 Revision 1) without reproducing its contents","Reference to additional external document (Bureau Veritas Directive 80-184-015(B) R1)","Amendment structure requires understanding of prior versions (Amendment 1 changed inspection intervals; Amendment 2 changed applicability)","Technical aviation terminology requiring specialized knowledge (part numbers, 'time in service', 'fretting corrosion', 'Starflex star')","Historical effective dates spanning 1980, 1988, and 2007 creating layered compliance obligations"],"plain_english_summary":"This CASA Airworthiness Directive mandates periodic inspections of the securing bolts that attach the Starflex star to the main rotor shaft on Eurocopter AS350 helicopters when fitted with bolt P/Ns 350A37‑1202‑20 or 350A37‑1224‑20. It responds to bolt loosening and fretting corrosion that can lead to cracking and rotor failure. Amendment 2 (Apr 2007) narrows applicability to only aircraft with those specific bolts while retaining the inspection regime."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts","history":"/api/acts/ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts/history","analysis":"/api/acts/ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts/analysis","conflicts":"/api/acts/ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts/conflicts","importantCases":"/api/acts/ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts/important-cases","documents":"/api/acts/ad-ecureuil-8-amdt-2-starflex-star-to-main-rotor-shaft-securing-bolts/documents"}}