{"id":"F2006B04783","name":"AD/BN-2/70 - Elevator Outboard Hinge Bracket","slug":"ad-bn-2-70-elevator-outboard-hinge-bracket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44562,"registerId":"commonwealth-F2006B04783-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.002.png)\n\n![](image.002.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.","sortOrder":0},{"sectionNumber":"AD/BN-2/70 Elevator Outboard Hinge Brack","sectionType":"part","heading":"AD/BN-2/70 Elevator Outboard Hinge Bracket 10/2000","content":"# AD/BN-2/70 Elevator Outboard Hinge Bracket 10/2000\n\nApplicability: Models BN2, BN2A, BN2B, BN2T, and BN2T-4S aircraft, as qualified by Section 3, ‘Applicability’, of the Service Bulletin referred to in the ‘Requirement’ below.\n\nRequirement: Inspect the elevator outboard hinge bracket in accordance with B-N Group Service Bulletin BN2/SB.259 Issue 1.\n\nCompliance: Inspect within 100 hours time in service after 5 October 2000.\n\nThen, reinspect at intervals not to exceed:\n\n    1000 hours, if the hinge bracket has been replaced in accordance with Part 2 of the Service Bulletin; or\n\n    100 hours, if not.\n\nThis Airworthiness Directive becomes effective on 5 October 2000.\n\nBackground: The manufacturer has received reports of cracks and loose rivets found in some elevator outboard hinge, inboard brackets, part number NB-31-0077. This Directive requires inspections.\n\n![](image.003.png)  \n\nSteve Swift\n\nDelegate of the Civil Aviation Safety Authority 25 August 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 6 September 2000.","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, narrowly-targeted airworthiness directive addressing a specific mechanical defect in a specific aircraft type. The scope remains tightly focused on the elevator hinge bracket issue as originally identified."},"complexity_factors":["Single, clearly defined applicability (5 specific aircraft models)","One primary action required (visual inspection per referenced service bulletin)","Simple binary compliance schedule (100 hours vs 1,000 hours based on replacement status)","No defined terms section — relies on external service bulletin for technical details","No nested exceptions or conditional logic beyond the replacement status test","Short document (approximately 250 words of substantive text)"],"plain_english_summary":"CASA Airworthiness Directive requires inspection of the elevator outboard hinge bracket on Britten‑Norman Islander models BN2, BN2A, BN2B, BN2T and BN2T‑4S after cracks and loose rivets were found that could impair pitch control. \n\nFirst inspection within 100 hours' flight time after 5 October 2000; then every 1,000 hours if an improved bracket is fitted or every 100 hours if the original bracket remains—preventing potential structural failure of a primary flight control."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive keeps a narrowly focused scope: specified BN2 family aircraft and the elevator outboard hinge bracket inspections per the cited Service Bulletin. It neither expands to other parts nor creates additional regulatory powers beyond requiring inspection, repair or replacement and setting reinspection intervals."},"complexity_factors":["Narrow applicability limited to BN2, BN2A, BN2B, BN2T and BN2T‑4S models (Applicability).","Mandates adherence to an external Service Bulletin for inspection procedures, creating a dependency on that document (Requirement: BN2/SB.259 Issue 1).","Two-tier reinspection schedule tied to whether the bracket was replaced per Part 2, adding a conditional compliance path (Compliance).","Short initial compliance window (inspect within 100 hours after 5 Oct 2000), which creates immediate operational scheduling pressure (Compliance).","Requires qualified maintenance, potential downtime and repair costs for operators; cost and capability burdens fall on aircraft owners/operators (Requirement; Background).","Enforcement authority exercised by a CASA delegate under CAR 1998 subregulation 39.1(1), leaving implementation and certification discretion with the regulator (preamble/signature)."],"plain_english_summary":"This directive makes owners/operators of BN2 family aircraft inspect the elevator outboard hinge bracket following B‑N Group Service Bulletin BN2/SB.259 within 100 flight hours of 5 October 2000, then reinspect at either 1,000‑hour intervals if the bracket was replaced per Part 2 or 100‑hour intervals if not. It responds to reports of cracked brackets and loose rivets; operators pay inspection and repair costs, must follow the Service Bulletin, and CASA (the delegate) enforces timing and compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-70-elevator-outboard-hinge-bracket","history":"/api/acts/ad-bn-2-70-elevator-outboard-hinge-bracket/history","analysis":"/api/acts/ad-bn-2-70-elevator-outboard-hinge-bracket/analysis","conflicts":"/api/acts/ad-bn-2-70-elevator-outboard-hinge-bracket/conflicts","importantCases":"/api/acts/ad-bn-2-70-elevator-outboard-hinge-bracket/important-cases","documents":"/api/acts/ad-bn-2-70-elevator-outboard-hinge-bracket/documents"}}