{"id":"F2006B04789","name":"AD/BN-2/76 - Control Column Universal Joint","slug":"ad-bn-2-76-control-column-universal-joint","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44573,"registerId":"commonwealth-F2006B04789-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-2/76 Control Column Universal Join","sectionType":"part","heading":"AD/BN-2/76 Control Column Universal Joint 9/2002","content":"# AD/BN-2/76 Control Column Universal Joint 9/2002\n\nDM\n\nApplicability: All Islander Series aircraft.\n\nRequirement: Inspect in accordance with B-N Group Ltd Service Bulletin SB 284.\n\nNote: UK CAA AD 004-05-2002 refers.\n\nCompliance: Within 10 hours time in service after 17 July 2002, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 17 July 2002.\n\nBackground: The manufacturer has identified a limited number of dimensionally incorrect control column universal joints where the joint diameter is shouldered to a smaller diameter than specified.\n\n![](image.002.jpeg)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 11 July 2002\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 Airworthiness Directive targeting a specific mechanical defect in a specific aircraft series. It has not expanded beyond its original purpose of mandating a safety inspection for a known manufacturing defect."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (Service Bulletin SB 284)","Single, unambiguous requirement with clear compliance deadline","No nested exceptions or conditional logic — only one exemption ('unless already accomplished')","No cross-references to other legislation beyond a note about a UK equivalent directive","Straightforward applicability (all aircraft in the series)"],"plain_english_summary":"Owners/operators of Pilatus Britten Norman BN-2 Islander aircraft must, within 10 flight hours after 17 July 2002 (unless already done), inspect the control column universal joint per manufacturer Service Bulletin SB 284. CASA’s delegate issued this mandatory Airworthiness Directive because some joints were machined undersize, creating an unsafe condition that could impair control. Aircraft may not legally fly without completing or having completed the inspection."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No: the AD implements the manufacturer's identification of a dimensional defect by requiring inspection of the control-column universal joint for all Islander Series aircraft (Requirement: inspect per SB 284; Compliance: within 10 hours TIS after 17 July 2002). The directive confines action to inspection and any corrective steps specified in the service bulletin and does not expand beyond that stated purpose."},"complexity_factors":["Dependence on an external document (B‑N Group Ltd Service Bulletin SB 284) to specify the inspection method and remedial action.","Short compliance window: inspection required within 10 hours time-in-service after 17 July 2002.","Applicability covers all Islander Series aircraft, creating potentially broad operational impact for owners/operators.","Background describes a limited number of dimensionally incorrect parts but does not quantify affected serials—necessitates trace/identification work by operators.","Legal basis specified under subregulation 39.1(1) of CAR 1998; regulatory compliance and recordkeeping obligations follow from that authority.","Cross-reference to UK CAA AD 004-05-2002 introduces coordination/interpretation with an overseas authority's action."],"plain_english_summary":"This Airworthiness Directive requires operators of all Pilatus Britten Norman Islander series aircraft to inspect the control-column universal joint for a dimensional defect identified by the manufacturer. The inspection must follow B‑N Group Ltd Service Bulletin SB 284. CASA (by delegate under CAR 1998) set a compliance deadline: inspect within 10 hours time-in-service after 17 July 2002. Aircraft owners/operators bear the cost and must locate and remediate any undersized joints found."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-76-control-column-universal-joint","history":"/api/acts/ad-bn-2-76-control-column-universal-joint/history","analysis":"/api/acts/ad-bn-2-76-control-column-universal-joint/analysis","conflicts":"/api/acts/ad-bn-2-76-control-column-universal-joint/conflicts","importantCases":"/api/acts/ad-bn-2-76-control-column-universal-joint/important-cases","documents":"/api/acts/ad-bn-2-76-control-column-universal-joint/documents"}}