{"id":"F2006B04786","name":"AD/BN-2/73 - Emergency Exit Window","slug":"ad-bn-2-73-emergency-exit-window","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44567,"registerId":"commonwealth-F2006B04786-current","compilationNumber":null,"startDate":"2026-04-02","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\nPilatus Britten Norman BN-2 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BN-2/73 Emergency Exit Window 13/2001","sectionType":"part","heading":"AD/BN-2/73 Emergency Exit Window 13/2001 DM","content":"# AD/BN-2/73 Emergency Exit Window 13/2001 DM\n\nApplicability: All Model BN-2 Series aircraft.\n\nRequirement: Inspect in accordance with B-N Group Service Bulletin SB 277.\n\nNote: UK CAA AD 001-08-2001 refers.\n\nCompliance: Within 10 flight hours after the effective date of this Directive, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 7 November 2001.\n\nBackground: A report was received from the UK Air Accidents Investigation Board of an emergency exit window that could not be fully opened due to required sealant incorrectly applied.\n\n![](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 31 October 2001\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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow safety directive addressing a specific mechanical defect on a specific aircraft type. It has not expanded beyond its original purpose of ensuring emergency exit functionality."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (the Service Bulletin)","No cross-references to other legislation beyond a single note about a UK equivalent directive","Simple conditional logic: inspect unless already done","Single, clear compliance deadline (10 flight hours)","No nested exceptions or complex procedural requirements"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Pilatus Britten Norman BN-2 aircraft in Australia to have emergency exit windows inspected per the manufacturer’s Service Bulletin SB 277 after sealant-related sticking was found.  \n\nThe inspection must be done within 10 flight hours of the directive’s effective date (7 November 2001). It prevents a known defect that could block evacuation and cause serious injury or death."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument applies to 'All Model BN‑2 Series aircraft' and requires inspection per SB 277 within 10 flight hours to address the reported unsafe condition. The AD text shows no modification or expansion of scope beyond that corrective intent."},"complexity_factors":["Single, narrow requirement: one inspection action required (Requirement: inspect per B‑N Group Service Bulletin SB 277).","Short compliance window: inspection mandated within 10 flight hours after effective date (Compliance).","Dependence on external technical document (SB 277) for inspection procedure — AD does not embed procedural detail.","No corrective-action text in the AD itself; follow-up repairs depend on SB 277 or operator/maintenance judgement.","Technical nature of inspection requires qualified maintenance personnel and access to service documentation.","Reference to foreign authority (UK CAA AD) for context may require cross-checking.","Clear legal basis but limited administrative detail: CASA delegate issued under CAR 1998 subreg 39.1(1) (Background/signature)."],"plain_english_summary":"This Airworthiness Directive orders owners/operators of all Pilatus Britten Norman BN‑2 series aeroplanes to have the emergency exit window inspected in accordance with B‑N Group Service Bulletin SB 277 because a UK report found sealant was incorrectly applied and an exit could not be fully opened. The CASA delegate issued the AD under CAR 1998 subreg 39.1(1); operators must organise the inspection within 10 flight hours and bear any inspection and repair costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-73-emergency-exit-window","history":"/api/acts/ad-bn-2-73-emergency-exit-window/history","analysis":"/api/acts/ad-bn-2-73-emergency-exit-window/analysis","conflicts":"/api/acts/ad-bn-2-73-emergency-exit-window/conflicts","importantCases":"/api/acts/ad-bn-2-73-emergency-exit-window/important-cases","documents":"/api/acts/ad-bn-2-73-emergency-exit-window/documents"}}