{"id":"F2006B06729","name":"AD/S-76/53 - Doors - Window Frame","slug":"ad-s-76-53-doors-window-frame","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114555,"registerId":"commonwealth-F2006B06729-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/S-76/53 - Doors - Window Frame","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Sikorsky S-76 Series Helicopters\n\n \n\nAD/S-76/53 Doors - Window Frame 11/88\n\nApplicability: All S-76A and S-76B series aircraft.\n\n \n\nRequirement: Action in accordance with Sikorsky Alert Service Bulletin 76-52-12. Compliance:  Prior to issue of the next Maintenance Release after 3 November 1988.\n\nBackground: There have been cases of the screws and/or rivets securing the mounts for the window trim scoring the upper door lock control rod.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1510},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive addresses a discrete, specific mechanical defect (window frame hardware interfering with door lock mechanisms). There is no indication of scope expansion beyond this original safety issue."},"complexity_factors":["Single, unambiguous technical requirement","Implementation details contained entirely within referenced external document (Sikorsky Alert Service Bulletin 76-52-12)","Narrow applicability limited to two specific aircraft models (S-76A and S-76B)","No exceptions, conditional provisions, or defined terms"],"plain_english_summary":"**What this is:** An Airworthiness Directive (mandatory safety order) requiring helicopter operators to fix a door hardware defect on specific Sikorsky models.\n\n**Who it affects:** Owners and operators of Sikorsky S-76A and S-76B helicopters.\n\n**What it requires:** Operators must carry out specific repairs or inspections in accordance with Sikorsky Alert Service Bulletin 76-52-12. This involves addressing screws and/or rivets that secure the window trim mounts, which were found to be scoring (scratching/damaging) the upper door lock control rod.\n\n**Why it matters:** Damage to the door lock control rod could prevent the door from locking or sealing properly. In flight, this creates serious safety risks including potential door failure, cabin pressurization issues, or injury to occupants.\n\n**Compliance timing:** The work must be completed before the aircraft can receive its next Maintenance Release (the certificate stating the aircraft is airworthy) after 3 November 1988."}},"importantCases":[],"_links":{"self":"/api/acts/ad-s-76-53-doors-window-frame","history":"/api/acts/ad-s-76-53-doors-window-frame/history","analysis":"/api/acts/ad-s-76-53-doors-window-frame/analysis","conflicts":"/api/acts/ad-s-76-53-doors-window-frame/conflicts","importantCases":"/api/acts/ad-s-76-53-doors-window-frame/important-cases","documents":"/api/acts/ad-s-76-53-doors-window-frame/documents"}}