{"id":"F2006B04855","name":"AD/CAP 232/3 Amdt 3 - Trim Control Tab Axis","slug":"ad-cap-232-3-amdt-3-trim-control-tab-axis","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44662,"registerId":"commonwealth-F2006B04855-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CAP 232/3 Amdt 3 - Trim Control Tab Axis","content":"![](image.001.png)\n\n![](image.001.png)  \nAIRWORTHINESS DIRECTIVE\n\nOn the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CAP 232/3 Amdt 2 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\nCAP Aviation (Akrotech and Mudry) CAP 232 Series Aeroplanes\n\nAD/CAP 232/3\n\nAmdt 3\n\n  \nTrim Control Tab Axis 12/2004\n\nApplicability: CAP 232 aircraft, all serial numbers; and CAP 231 EX aircraft, serial numbers 02 through 06.\n\nRequirement: 1. Replace trim tab control axis part number 2734-9220401A with a new trim tab control axis part number 2734-0212007, in accordance with Apex Aircraft Service Bulletin (SB) No. 980901 Revision 4, dated June 2004.\n\n2. Inspect the new trim tab control axis in accordance with SB No. 980901 Revision 4.\n\nNote: DGAC AD F-2001-133 R3 refers.\n\nCompliance: 1. At the next scheduled maintenance check (except daily inspection check) after 25 November 2004.\n\n2. Following installation, inspect the new trim tab control axis at intervals not to exceed 100 flight hours.\n\nUntil the new trim tab control axis is installed, continue to inspect the previously installed trim tab control axis at intervals not to exceed 50 flight hours.\n\nThis Amendment becomes effective on 25 November 2004.\n\nBackground: Following a failure of the trim tab control axis, a life limit of 200 flight hours was imposed.\n\nAmendment 1 introduced a new trim tab control axis with a life limit of 1,000 flight hours.\n\nAmendment 2 introduced repetitive inspections of the new 1,000 hour life limited trim tab control axis, due to an in-service failure.\n\nAmendment 3 is issued in response to a revision of the related DGAC AD, which requires replacement of the previously installed trim tab control axis with a new, improved, trim tab control axis.\n\nCAP Aviation (Akrotech and Mudry) CAP 232 Series Aeroplanes\n\nAD/CAP 232/3 Amdt 3 (continued)\n\n![](image.002.png)  \nThe original issue of this Airworthiness Directive became effective on 2 May 2001\\. Amendment 1 of this Airworthiness Directive became effective on 13 June 2002.\n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 14 October 2004\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 3 November 2004.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Yes. The original AD imposed life limits and later required inspections; Amendment 3 now mandates replacement of the previously installed trim tab control axis with a new, improved part (Requirement) and sets revised inspection intervals (Compliance). The change shifts from life-limit/inspection management to an affirmative replacement obligation, expanding the set of actions operators must take compared with the original AD (Background; Requirement; Compliance)."},"complexity_factors":["Clear, narrow applicability by aircraft type and specific serial numbers (Applicability).","Specific part-number replacement mandated (Requirement: replace P/N 2734-9220401A with P/N 2734-0212007).","Normative reliance on an external technical document: Apex Aircraft Service Bulletin No. 980901 Revision 4 (Requirement).","Two-tier inspection regime with different intervals before and after replacement (Compliance: 50 h vs 100 h).","Compliance timing linked to 'next scheduled maintenance check' rather than a fixed calendar date (Compliance).","Regulatory basis under CASR subregulation 39.1(1) and reference to DGAC AD for background—adds cross-jurisdictional provenance.","Amendment history (original AD and two prior amendments) creates operational context and legacy compliance obligations (Background)."],"plain_english_summary":"This Airworthiness Directive requires replacing the trim tab control axis P/N 2734-9220401A with an improved P/N 2734-0212007 and sets mandatory inspection intervals for the new part. It applies to CAP 232 aircraft (all serial numbers) and CAP 231 EX serials 02–06. Operators must install the new axis at the next scheduled maintenance and then inspect it every 100 flight hours (previous axes must be inspected every 50 hours until replaced). The change responds to prior in‑service failures and a related DGAC directive."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The legislation maintains its original scope as a targeted safety directive for specific aircraft models. While it has been amended three times to strengthen requirements (from flight hour limits to inspections to mandatory replacement), each amendment addresses the same underlying safety issue with the same aircraft population. The scope has not expanded to cover additional aircraft types or unrelated systems."},"complexity_factors":["Single, specific mechanical action required (part replacement)","Clear applicability limited to two specific aircraft models with defined serial numbers","Straightforward compliance timeline with only two conditions (next maintenance check or continued inspection)","Only one cross-reference to an external technical document (DGAC AD F-2001-133 R3)","No nested definitions or interpretation sections","Background provides clear sequential history of amendments"],"plain_english_summary":"Safety order for CAP Aviation CAP 232 series and certain CAP 231 EX aircraft requiring owners/operators to replace the faulty trim‑tab control axis (p/n 2734‑9220401A) with an improved part (p/n 2734‑0212007) per Apex Service Bulletin 980901 Rev 4. Until replacement, tighter inspections are required and post‑installation inspections continue periodically. The amendment follows in‑service failures of the original part that risk loss of trim control and flight safety."},"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-cap-232-3-amdt-3-trim-control-tab-axis","history":"/api/acts/ad-cap-232-3-amdt-3-trim-control-tab-axis/history","analysis":"/api/acts/ad-cap-232-3-amdt-3-trim-control-tab-axis/analysis","conflicts":"/api/acts/ad-cap-232-3-amdt-3-trim-control-tab-axis/conflicts","importantCases":"/api/acts/ad-cap-232-3-amdt-3-trim-control-tab-axis/important-cases","documents":"/api/acts/ad-cap-232-3-amdt-3-trim-control-tab-axis/documents"}}