{"id":"F2006B10796","name":"AD/IAI-W/20 - Aileron Radiographic Inspection","slug":"ad-iai-w-20-aileron-radiographic-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56261,"registerId":"commonwealth-F2006B10796-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/IAI-W/20 - Aileron Radiographic Inspection","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)  \nIsrael Aircraft Industries 1123 and 1124 (Westwind) 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 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\nAD/IAI-W/20 Aileron Radiographic Inspection 5/2000 Applicability: Models 1124 and 1124A S/nos 297,304, and 400 to 410 (S/no. 405 RH aileron only). Requirement: Inspect in accordance with IAI Westwind Alert SB 1124-27A-145.\n\nCompliance: Within 200 hours time in service after the effective date of this directive.\n\nNote: Israel AD No. 57-00-02-06 refers.\n\nThis Airworthiness Directive becomes effective on 18 May 2000.\n\nBackground: It has been discovered that some ailerons may have been assembled with insufficient fasteners in the aileron rib to spar connections.\n\n![Signature of Bernard Malcolm Hole](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 7 April 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 19 April 2000.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific manufacturing defect in specific aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific applicability (3 serial number ranges plus one partial exception)","One clear requirement referencing an external technical standard (IAI Service Bulletin)","Simple compliance deadline (200 hours time in service)","No nested conditions, exceptions to exceptions, or complex cross-references","No defined terms section — uses plain aviation terminology","Total length: approximately 250 words"],"plain_english_summary":"This AD requires owners/operators of certain IAI Westwind 1124/1124A jets (SNs 297, 304, 400–410; SN 405 only RH aileron) to have the ailerons X‑rayed per IAI Alert Service Bulletin 1124‑27A‑145. The inspection, mandated within 200 flight hours after 18 May 2000, addresses a critical assembly defect—too few fasteners between aileron ribs and the main spar—that could cause aileron failure and loss of control. Aircraft may not be legally flown until inspected."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's scope matches the safety issue described: it targets the specific Westwind models and serial numbers where insufficient aileron fasteners were found and mandates a one-off radiographic inspection per the IAI alert. It does not broaden applicability or add requirements beyond inspecting and, if necessary, correcting the fastener condition."},"complexity_factors":["Narrow applicability: specific models (1124/1124A) and serial numbers limit affected fleet","Single, discrete required action (radiographic inspection) rather than ongoing program","Reference to an external service bulletin (IAI Alert SB 1124-27A-145) for inspection procedures","Specialist resource requirement: radiographic (NDT) equipment and qualified technicians","Short compliance window (within 200 hours time in service) can disrupt operators' planned maintenance scheduling","Potential downstream repairs if inspections reveal missing/insufficient fasteners, adding cost and downtime","Regulatory enforcement and record-keeping obligations (CASA delegate authority and maintenance release documentation)","Cross-reference to Israel AD (No. 57-00-02-06) creates multi-jurisdictional traceability requirements"],"plain_english_summary":"This directive orders operators of IAI Westwind 1124/1124A aeroplanes with the listed serial numbers to have the aileron rib-to-spar fastener areas X‑rayed (radiographic inspection) following IAI Alert SB 1124-27A-145, within 200 flight hours. CASA issued it to find and fix potentially missing or insufficient fasteners discovered in assembly. Aircraft operators pay for the inspection and any repairs, must engage qualified NDT/maintenance personnel, and update maintenance records to show compliance."},"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-iai-w-20-aileron-radiographic-inspection","history":"/api/acts/ad-iai-w-20-aileron-radiographic-inspection/history","analysis":"/api/acts/ad-iai-w-20-aileron-radiographic-inspection/analysis","conflicts":"/api/acts/ad-iai-w-20-aileron-radiographic-inspection/conflicts","importantCases":"/api/acts/ad-iai-w-20-aileron-radiographic-inspection/important-cases","documents":"/api/acts/ad-iai-w-20-aileron-radiographic-inspection/documents"}}