{"id":"F2006B04796","name":"AD/BN-2/82 - Elevator Final Drive Rod","slug":"ad-bn-2-82-elevator-final-drive-rod","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44582,"registerId":"commonwealth-F2006B04796-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\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 CASR 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\n![](image.001.png)  \n\nPilatus Britten-Norman BN-2 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/BN-2/82 Elevator Final Drive Rod 7/20","sectionType":"part","heading":"AD/BN-2/82 Elevator Final Drive Rod 7/2004 DM","content":"# AD/BN-2/82 Elevator Final Drive Rod 7/2004 DM\n\nApplicability: All Model BN2, BN2A, BN2B, BN2T, BN2T-4R, and BN2T-4S series Islander aircraft.\n\nRequirement: Inspect the internal surface of the elevator system final drive control rod in accordance with B-N Group Service Bulletin SB 303 Issue 1.\n\nNote: UK CAA Emergency AD G-2004-0011 refers.\n\nCompliance: Within 50 hours time in service or one month after 2 June 2004, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 2 June 2004.\n\nBackground: The manufacturer has identified several cases of corroded elevator final drive control rods. If not corrected, corrosion of the internal surface could result in failure or collapse of the rod, resulting in loss of control or jamming of the elevator system.\n\n![](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 26 May 2004\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 AD maintains its original narrow scope. It addresses a specific safety-of-flight issue (corrosion in elevator control rods) for a defined aircraft fleet, exactly as intended when the unsafe condition was identified. No expansion beyond the original safety purpose."},"complexity_factors":["Single, specific mechanical component addressed (elevator final drive rod)","Only one substantive requirement: visual inspection per referenced manufacturer bulletin","Simple binary applicability (all models in BN-2 series listed)","Straightforward compliance deadline (50 hours OR 1 month, whichever first)","No nested exceptions, conditional logic, or alternative compliance methods","No defined terms section; plain language throughout","Single cross-reference to UK CAA Emergency AD for context only","Total length: approximately 200 words of operative text"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators and maintenance engineers of Pilatus Britten‑Norman Islander (BN2/BN2A/BN2B/BN2T series) aircraft inspect the elevator final‑drive control rod for internal corrosion. It’s compulsory and time‑critical (inspect within the short compliance window set by the AD).\n\nInternal corrosion could cause rod collapse or elevator jam, risking loss of control—this AD prevents such potentially catastrophic failures."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope is limited to the listed BN‑2 variants and requires a one‑off inspection per the referenced service bulletin within the specified compliance window. It does not broaden applicability beyond those models or add ongoing inspection intervals in the text provided."},"complexity_factors":["Narrow applicability: only specified BN‑2 series models are covered (BN2, BN2A, BN2B, BN2T, BN2T‑4R, BN2T‑4S).","External reference: inspection procedure is defined in B‑N Group Service Bulletin SB 303 Issue 1 rather than fully set out in the AD.","Technical requirement: internal-surface inspection may require disassembly, special tools or specialist personnel.","Tight compliance window: 50 flight hours or one month increases scheduling pressure on operators.","Safety-critical consequence: potential for loss or jamming of elevator control increases enforcement urgency.","Limited remedial detail: AD mandates inspection but does not itself specify repair/replacement criteria beyond the service bulletin."],"plain_english_summary":"This Airworthiness Directive requires operators of Pilatus Britten‑Norman BN‑2 series aircraft to inspect the internal surface of the elevator final drive control rod, following B‑N Group Service Bulletin SB 303 Issue 1. Compliance must occur within 50 flight hours or one month after 2 June 2004. CASA states the inspection addresses internal corrosion that could cause rod failure, loss of elevator control or jamming. The immediate cost and operational burden fall on aircraft owners/operators to arrange the inspection and any repairs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bn-2-82-elevator-final-drive-rod","history":"/api/acts/ad-bn-2-82-elevator-final-drive-rod/history","analysis":"/api/acts/ad-bn-2-82-elevator-final-drive-rod/analysis","conflicts":"/api/acts/ad-bn-2-82-elevator-final-drive-rod/conflicts","importantCases":"/api/acts/ad-bn-2-82-elevator-final-drive-rod/important-cases","documents":"/api/acts/ad-bn-2-82-elevator-final-drive-rod/documents"}}