{"id":"F2006B04838","name":"AD/CA25/7 Amdt 1 - Aileron Hanger Ribs","slug":"ad-ca25-7-amdt-1-aileron-hanger-ribs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44639,"registerId":"commonwealth-F2006B04838-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CA25/7 Amdt 1 - Aileron Hanger Ribs","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n![](image.002.png)  \nSkyfox Aviation (Hedaro) CA25 Series Aeroplanes\n\nAIRWORTHINESS 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 revokes Airworthiness Directive (AD) AD/CA25/7 and issues the following 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\nAD/CA25/7\n\nAmdt 1\n\n  \n\nAileron Hanger Ribs 9/2000 DM\n\nApplicability: All CA22A/25, CA25 and CA25N aircraft.\n\nRequirement: Inspect and test all aileron hanger rib extensions in accordance with the Accomplishment Instructions of Skyfox Aviation Ltd Service Bulletin No. 24, Initial Issue, dated 27 February 1998.\n\nCompliance: Before further flight after 2 August 2000; thereafter at intervals not to exceed 100 hours or 12 months, whichever occurs first.\n\nThis Amendment becomes effective on 2 August 2000.\n\nBackground: During an unscheduled inspection, an aileron hanger rib extension was broken with little downward pressure. The purpose of this Directive was to check the structural integrity of all aircraft in-operation which may be similarly affected.\n\nAmendment 1 is issued in response to a deteriorated aileron hanger rib found on a Skyfox CA25N aircraft that recently suffered an in-flight separation of the right hand aileron. This Directive requires further inspections of the aileron hanger ribs.\n\nThe original issue of this Airworthiness Directive became effective on 3 March 1998.\n\n![](image.003.png)  \n\nNeville James Probert\n\nDelegate of the Civil Aviation Safety Authority 27 July 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 2 August 2000.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the 1998 Airworthiness Directive. It addresses the same safety issue (aileron hanger rib integrity) on the same aircraft types. The amendment narrows the focus slightly by responding to a specific incident (in-flight aileron separation) but does not expand beyond the original safety purpose of ensuring structural integrity of these components."},"complexity_factors":["Single, clearly defined applicability (three specific aircraft models)","One primary requirement referencing an external technical document (Service Bulletin No. 24)","Simple compliance structure: initial deadline plus recurring interval (100 hours/12 months)","Minimal defined terms (only aircraft model designations)","No nested exceptions or conditional logic","Short document (approximately 250 words of substantive text)","Clear linear structure: Applicability → Requirement → Compliance → Background"],"plain_english_summary":"This safety order replaces the earlier AD/CA25/7 and requires owners/operators of Skyfox CA22A, CA25 and CA25N aeroplanes to inspect and test the aileron hanger rib extensions per Skyfox Service Bulletin No. 24. It responds to an in‑flight aileron separation after a deteriorated rib was found, because rib failure can cause loss of roll control. Inspections must be done before next flight after 2 August 2000 and repeated every 100 flight hours or 12 months."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the original AD response by requiring further and recurring inspections of aileron hanger ribs after a deteriorated rib and an in‑flight aileron separation were found. The original AD (effective 3 March 1998) is revoked and replaced by this directive effective 2 August 2000, increasing inspection frequency and formalising a repeat interval."},"complexity_factors":["Narrow applicability: specific to Skyfox CA22A/25, CA25 and CA25N models (Applicability).","Clear, single action required: inspect and test aileron hanger rib extensions per Skyfox Service Bulletin No.24 (Requirement).","Recurring compliance schedule creates operational planning burden: initial before next flight after 2 Aug 2000, then every 100 hours or 12 months (Compliance).","Immediate compliance obligation may cause short‑term grounded aircraft and repair costs for owners/operators (Compliance; Background).","Dependence on an external document (Service Bulletin No.24) for inspection method increases reliance on manufacturer instructions (Requirement).","Administrative change: revokes original AD and issues Amendment 1, requiring operators to track superseded directives (Background).","Authority exercised by CASA delegate under subregulation 39.1(1) centralises decision and enforcement (preamble)."],"plain_english_summary":"Requires owners/operators of Skyfox CA22A/25, CA25 and CA25N aeroplanes to inspect and test all aileron hanger rib extensions following Skyfox Service Bulletin No.24. Inspections must be done before the next flight after 2 August 2000 and then every 100 flight hours or 12 months, whichever is sooner. The CASA delegate issued the directive after a broken/deteriorated rib and an in‑flight aileron separation. Aircraft operators pay for inspections and any repairs and must follow the manufacturer’s instructions to maintain airworthiness."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ca25-7-amdt-1-aileron-hanger-ribs","history":"/api/acts/ad-ca25-7-amdt-1-aileron-hanger-ribs/history","analysis":"/api/acts/ad-ca25-7-amdt-1-aileron-hanger-ribs/analysis","conflicts":"/api/acts/ad-ca25-7-amdt-1-aileron-hanger-ribs/conflicts","importantCases":"/api/acts/ad-ca25-7-amdt-1-aileron-hanger-ribs/important-cases","documents":"/api/acts/ad-ca25-7-amdt-1-aileron-hanger-ribs/documents"}}