{"id":"F2006B04850","name":"AD/CAP 10/8 Amdt 1 - Aileron Bellcrank Bolts","slug":"ad-cap-10-8-amdt-1-aileron-bellcrank-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44657,"registerId":"commonwealth-F2006B04850-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CAP 10/8 Amdt 1 - Aileron Bellcrank Bolts","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CAP 10/8 and issues the following 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\nAvions Mudry Cap Series Aeroplanes\n\nAD/CAP 10/8\n\nAmdt 1\n\n  \n\nAileron Bellcrank Bolts 2/2005 DM\n\nApplicability: APEX AIRCRAFT CAP10B aeroplanes,\n\n    Serial number (SN) up to 299 inclusive, modified in accordance with the modification 000302 “CAP10C wing”; and\n\n    b. SN 300 through SN 310 inclusive; and\n\nc. SN 312 & 313.\n\nRequirement: Replace aileron bellcrank pivot bolts in accordance with the APEX aircraft Service Bulletin 031101 dated 16 July 2004 or later revision approved by DGAC / EASA.\n\nNote: DGAC France Airworthiness Directive (AD) F-2004-144 dated 18 August 2004 as approved under EASA reference 2004-8598 dated 10 August 2004 refers.\n\nCompliance: Unless previously accomplished, within 50 flight hours, from the effective date of this AD.\n\nThis Amendment becomes effective on 23 December 2004.\n\nBackground: During rapid descent, vibrations were observed in the aileron system of a CAP10C aircraft. Replacing the aileron bellcrank bolts together with the washers installed between the brackets will reduce the play and the resultant vibrations in the control system.\n\nThis AD addresses the identified unsafe condition associated with the vibrations in the control system.\n\nThe original issue of this AD becomes effective on 23 December 2004.\n\nAvions Mudry Cap Series Aeroplanes\n\nAD/CAP 10/8 Amdt 1 (continued)\n\nThis amendment is being issued to clarify the compliance statement.\n\n![](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 10 December 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 23 December 2004.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment is purely clarifying — it explicitly states it was issued 'to clarify the compliance statement' in the original AD. The scope remains identical: same aircraft, same safety issue, same required action. No expansion of regulatory reach."},"complexity_factors":["Single, specific mechanical issue (bolt replacement)","Limited applicability — only 3 narrow serial number ranges affected","One clear compliance action with reference to external manufacturer bulletin","Simple temporal compliance requirement (50 flight hours)","Minimal cross-referencing (only to CASR subregulation 39.1(1) and manufacturer service bulletin)","No nested conditions, exceptions, or defined terms section"],"plain_english_summary":"This AD revokes and replaces AD/CAP 10/8 to clarify compliance timing and requires replacement of specific aileron bellcrank pivot bolts and washers on certain APEX AIRCRAFT CAP10B aeroplanes (specified serial numbers, including some modified with CAP10C wings).  \n\nIt affects owners/operators of those aeroplanes because worn or loose bolts can cause control vibration during rapid descent; work must be done within 50 flight hours of the AD (effective 23 Dec 2004)."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This Amendment 1 does not expand the technical scope or the set of affected aircraft beyond the original AD; it revokes the prior AD/CAP 10/8 and reissues the same core requirement but with a clarified compliance statement. The requirement remains a single, targeted replacement action for specific serial numbers and the AD continues to rely on the same APEX service bulletin (or a later DGAC/EASA‑approved revision). There is no indication the amendment broadened applicability, added recurring obligations, or introduced new classes of affected persons."},"complexity_factors":["Short, single technical requirement (replace bolts/washers)","Limited applicability by specific serial numbers (three categories)","References an external service bulletin (APEX Service Bulletin 031101 dated 16 July 2004)","Requires use of ‘or later revision’ only if approved by DGAC/EASA (external approval dependency)","Cross‑reference to DGAC France AD F‑2004‑144/EASA reference","Clear compliance timeframe (50 flight hours) and effective date","Amendment purpose is narrow (clarify compliance statement); no nested exceptions or multiple conditional branches"],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- It is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) requiring a specific maintenance action on a defined set of aeroplanes.\n\n- Applicability: it applies to APEX AIRCRAFT CAP10B aeroplanes with the following serial numbers (SN):\n  - SN up to 299 inclusive that have been modified in accordance with modification 000302 (“CAP10C wing”);\n  - SN 300 through SN 310 inclusive; and\n  - SN 312 and SN 313.\n\n- Requirement: owners/operators must replace the aileron bellcrank pivot bolts (and the washers between the brackets) following the instructions in APEX Aircraft Service Bulletin 031101 dated 16 July 2004, or a later revision of that service bulletin that is approved by the French DGAC or EASA.\n\n- Compliance timing: unless already done, the replacement must be completed within 50 flight hours from the AD’s effective date (the amendment became effective 23 December 2004).\n\n- The AD revokes and replaces the earlier AD/CAP 10/8; this Amendment 1 was issued to clarify the compliance statement.\n\n**Why the AD was issued (stated safety rationale)**\n\n- During rapid descent, vibrations were observed in the aileron control system of a CAP10C aircraft. Replacing the bellcrank bolts and associated washers reduces play in the bellcrank assembly and thereby reduces those vibrations (this is the unsafe condition the AD addresses).\n\n**Who is affected and who decides**\n\n- Affected parties: aircraft owners and operators of the listed CAP10B aeroplanes, and the maintenance organisations or mechanics who perform the work.\n\n- Who decides/enforces: the CASA delegate has issued the AD and enforces compliance under CASR subregulation 39.1(1); compliance must be performed in accordance with the referenced APEX service bulletin or an approved revision.\n\n**What behaviour changes and immediate consequences**\n\n- Operators must schedule and carry out a one‑off maintenance action (bolt and washer replacement) on each affected aircraft within 50 flight hours if not already done.\n\n- Maintenance providers must follow the referenced service bulletin wording and any DGAC/EASA‑approved revisions; they may need to obtain or use specific replacement parts.\n\n**Costs, incentives, trade‑offs, and operational implications**\n\n- Direct costs: purchase of replacement bolts/washers and labour for installation.\n\n- Opportunity/time costs: aircraft will be unavailable while maintenance is performed; operators must plan this into flight schedules.\n\n- Supply/implementation risk: if replacement parts or approved revisions of the service bulletin are limited or take time to obtain, meeting the 50‑flight‑hour window may be more difficult.\n\n- Incentives: operators face a safety and regulatory incentive to perform the work promptly to remain legal and airworthy. Maintenance organisations gain short‑term billable work.\n\n- Bureaucratic discretion and cross‑jurisdictional dependence: the AD requires compliance with a service bulletin or later revision only if that revision is approved by DGAC/EASA — this ties the required technical standard to approvals from foreign/EASA authorities.\n\n**Practical compliance notes**\n\n- The AD is narrowly targeted: it requires a single technical replacement specified in a named service bulletin and applies only to specific serial numbers listed in the AD.\n\n- The AD cross‑references DGAC France AD F‑2004‑144 and relies on DGAC/EASA approval for later revisions of the service bulletin, so operators should check the current approved revision before doing the work.\n\n(References in AD: Requirement — APEX Service Bulletin 031101 dated 16 July 2004; Compliance — within 50 flight hours; Background — vibration observed; Applicability — serial number list.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cap-10-8-amdt-1-aileron-bellcrank-bolts","history":"/api/acts/ad-cap-10-8-amdt-1-aileron-bellcrank-bolts/history","analysis":"/api/acts/ad-cap-10-8-amdt-1-aileron-bellcrank-bolts/analysis","conflicts":"/api/acts/ad-cap-10-8-amdt-1-aileron-bellcrank-bolts/conflicts","importantCases":"/api/acts/ad-cap-10-8-amdt-1-aileron-bellcrank-bolts/important-cases","documents":"/api/acts/ad-cap-10-8-amdt-1-aileron-bellcrank-bolts/documents"}}