{"id":"F2006B06150","name":"AD/PC-6/46 - Aileron Mass Balance Weights and Flettner Tabs","slug":"ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46950,"registerId":"commonwealth-F2006B06150-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 Porter PC-6 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/PC-6/46 Aileron Mass Balance Weights ","sectionType":"part","heading":"AD/PC-6/46 Aileron Mass Balance Weights and Flettner Tabs 5/2002","content":"# AD/PC-6/46 Aileron Mass Balance Weights and Flettner Tabs 5/2002\n\nApplicability: All PC-6 series aircraft, up to and including MSN 939.\n\nRequirement: Action in accordance with the Accomplishment Instructions of Pilatus PC-6 Service Bulletin No. 57-001, dated 20 December 2001, and applicable portions of Pilatus PC-6 Service Bulletin No. 62B.\n\nNote: Switzerland FOCA AD HB 2002-001 refers.\n\nCompliance: Before 16 June 2002, unless already accomplished.\n\nThis Airworthiness Directive becomes effective on 16 May 2002.\n\nBackground: The aileron configuration on some PC-6 aircraft may be incorrect. In particular, configurations may not comply with that specified in Service Bulletin No. 62B. In addition, suspected bogus parts that do not comply with original manufacturer’s data may have been fabricated and installed during aircraft maintenance and repairs.\n\nIncorrect configuration and/or the use of unapproved parts could result in an unsafe condition.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 28 March 2002\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"No change to scope is evident within this document: it directs remediation for PC‑6 aircraft up to MSN 939 to correct aileron configuration and remove suspected non‑conforming parts, and confines the remedy to actions specified in the cited service bulletins (Applicability; Requirement; Background)."},"complexity_factors":["References external manufacturer documents for the required actions (Requirement) — operators must obtain and follow Service Bulletin No.57‑001 and 'applicable portions' of No.62B.","Narrow applicability to PC‑6 aircraft up to MSN 939 (Applicability) — reduces population but concentrates burden on affected owners/operators.","Ambiguous phrase 'applicable portions' of SB No.62B (Requirement) — creates interpretation and implementation uncertainty for maintainers.","Fixed compliance deadline (Compliance: before 16 June 2002) — scheduling pressure and short‑term cost for operators and maintenance organisations.","Requirement to identify and remove suspected bogus/non‑conforming parts (Background) — increases inspection, verification and parts‑traceability workload.","Issued under CASA delegate authority (Preamble) — limited regulatory discretion in scope but procedural reliance on referenced SBs."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Pilatus PC‑6 aeroplanes up to and including MSN 939 to inspect and, if necessary, modify aileron mass balance weights and Flettner tabs by following Pilatus Service Bulletin No. 57‑001 and applicable parts of Service Bulletin No. 62B to correct incorrect configurations and remove suspected non‑conforming parts. Compliance is mandatory by 16 June 2002; the aircraft owner/operator must arrange and pay for the work. The AD was issued by a CASA delegate under CAR 1998 subreg. 39.1(1)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific airworthiness concern (aileron mass balance weights and potential unapproved parts) on a specific aircraft type. The document has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 4 structural sections: Applicability, Requirement, Compliance, Background","No defined terms section — all terms are standard aviation terminology","Single cross-reference to Swiss aviation authority document (FOCA AD HB 2002-001) noted only as 'refers'","No nested conditions or exceptions — straightforward 'do this by this date' structure","Relies entirely on external technical documents (Service Bulletins) for actual implementation details"],"plain_english_summary":"This AD legally requires owners/operators of Pilatus Porter PC‑6 aircraft (serials up to 939) to inspect and correct aileron mass balance weights and Flettner tabs because incorrect or unapproved parts may cause loss of control. Compliance must follow Pilatus Service Bulletin No. 57‑001 (and relevant parts of SB No. 62B) before 16 June 2002."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs","history":"/api/acts/ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs/history","analysis":"/api/acts/ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs/analysis","conflicts":"/api/acts/ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs/conflicts","importantCases":"/api/acts/ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs/important-cases","documents":"/api/acts/ad-pc-6-46-aileron-mass-balance-weights-and-flettner-tabs/documents"}}