{"id":"F2006B02497","name":"AD/AS 355/43 Amdt 1 - In Door Sliding Windows","slug":"ad-as-355-43-amdt-1-in-door-sliding-windows","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41753,"registerId":"commonwealth-F2006B02497-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AS 355/43 Amdt 1 - In Door Sliding Windows","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)  \nEurocopter AS 355 (Twin Ecureuil) Series Helicopters\n\nAD/AS 355/43\n\nAmdt 1\n\n  \nIn Door Sliding Windows 3/94\n\nApplicability: Models E, F, F1, F2, and N, equipped with the sliding windows listed in the Requirement Document.\n\nRequirement: Action in accordance with Eurocopter AS 355 SB 05.26R1.\n\nNote: DGAC AD 93-089-048(B) R1 refers.\n\nCompliance: 1. Inspect within 25 hours time in service after 3 March 1994, and thereafter at intervals not exceeding 25 hours time in service until modified.\n\n2. Modify within 100 hours time in service after 3 March 1994, and thereafter inspect at intervals not exceeding 100 hours time in service until replaced by the post mod. windows listed in paragraph 1.C.3 of the Requirement Document.\n\nNote: Both the Requirement Document and the DGAC AD call the modification of the undamaged windows a Repair.\n\nThe effective date of the initial issue of this Directive was 7 July 1993.\n\nBackground: This Directive is raised to preclude the loss of a window during flight. Amendment 1 introduces a modification to existing windows in lieu of automatic window replacement.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment stays within the original safety purpose (preventing window loss). It simply adds an alternative compliance path (modification instead of replacement) without expanding to new aircraft types, components, or safety issues."},"complexity_factors":["Single, specific aircraft type and limited model variants (5 models)","Clear two-stage compliance structure (inspect, then modify)","Only one primary technical reference (Eurocopter SB 05.26R1)","Simple temporal trigger (hours 'time in service' after fixed date)","Minimal cross-referencing (one French DGAC AD mentioned as background only)","Straightforward amendment logic (original required replacement; amendment adds modification option)"],"plain_english_summary":"This CASA Airworthiness Directive mandates safety action for Eurocopter AS 355 (E, F, F1, F2, N) helicopters with certain door sliding windows after reports they can fall out in flight. It requires regular inspections and, within a set flight-hour limit, modification per Eurocopter Service Bulletin 05.26R1 as an alternative to full window replacement. It’s compulsory for affected owners/operators and grounded aircraft are not legal to fly until complied with."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 alters the original directive by introducing a modification (described as a 'Repair' in the Requirement Document) to existing windows instead of requiring automatic replacement. This changes the required compliance action from compulsory replacement to an option of modifying existing windows, and sets the inspection and modification intervals accordingly (Background; Requirement)."},"complexity_factors":["Specific applicability to certain AS 355 sub‑models and only those sliding windows listed in the Requirement Document (identification of affected parts required).","Two tiered recurring intervals: 25‑hour inspections until modification, and a 100‑hour modification deadline with 100‑hour inspection cadence if not replaced.","Dependence on an external service bulletin (Eurocopter SB 05.26R1) and a separate Requirement Document for technical steps and post‑mod window lists.","Cross‑reference to foreign airworthiness directive (DGAC AD 93‑089‑048(B) R1) increases traceability needs for international operators.","Terminology mismatch: the Requirement Document and DGAC call the modification a 'Repair', which may affect maintenance records and interpretation.","Operational impact: recurring inspections and a mandated modification create scheduling, downtime and cost implications for operators/owners."],"plain_english_summary":"Requires operators of Eurocopter AS 355 models E, F, F1, F2 and N fitted with specified sliding cabin windows to inspect and then modify those windows on a fixed timetable to prevent in‑flight window loss. The Civil Aviation Safety Authority requires inspections at 25 flight‑hour intervals until windows are modified, and modification within 100 flight hours (or 100‑hour inspections until replaced). Operators/owners pay for and schedule the inspections and modification; compliance follows Eurocopter SB 05.26R1 and the referenced Requirement Document."}},"importantCases":[],"_links":{"self":"/api/acts/ad-as-355-43-amdt-1-in-door-sliding-windows","history":"/api/acts/ad-as-355-43-amdt-1-in-door-sliding-windows/history","analysis":"/api/acts/ad-as-355-43-amdt-1-in-door-sliding-windows/analysis","conflicts":"/api/acts/ad-as-355-43-amdt-1-in-door-sliding-windows/conflicts","importantCases":"/api/acts/ad-as-355-43-amdt-1-in-door-sliding-windows/important-cases","documents":"/api/acts/ad-as-355-43-amdt-1-in-door-sliding-windows/documents"}}