{"id":"F2006B10768","name":"AD/IAI-A/10 - Engine Inlet Cowl and Aft Nacelle Attachment Bolts","slug":"ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56217,"registerId":"commonwealth-F2006B10768-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/IAI-A/10 - Engine Inlet Cowl and Aft Nacelle Attachment Bolts","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\nAIRWORTHINESS 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\nIsrael Aircraft Industries 1125 (Astra) Series Aeroplanes\n\nAD/IAI-A/10 Engine Inlet Cowl and Aft Nacelle Attachment\n\nBolts\n\n  \n8/2001\n\nDM\n\nApplicability: Model 1125 Astra aircraft, serial numbers 004 through 078, except 073. Requirement: Action in accordance with Israel Aircraft Industries Alert Service Bulletin 1124-54A-\n\n247.\n\nNote: Israel CAA AD 54-01-05-02 refers.\n\nCompliance: Within 50 hours time in service after 4 July 2001.\n\nThis Airworthiness Directive becomes effective on 4 July 2001.\n\nBackground: On some aircraft, AN3 part number bolts have been found installed on engine case flanges. These bolts are not approved and are considered as fatigue critical for this application. This Directive requires verification of approved bolts.\n\n![](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 27 June 2001\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 4 July 2001.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"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":false,"description":"The AD's scope aligns with the stated safety objective in the background: ensure only approved bolts are installed on engine case flanges. It applies to the specific serial-number range, mandates action per the IAI service bulletin, and sets a 50‑hour compliance window (Applicability; Requirement; Compliance; Background). There is no indication in the text that the AD's scope departs from that original purpose."},"complexity_factors":["Narrow applicability to specific aircraft serial numbers (Applicability: \"Model 1125 Astra aircraft, serial numbers 004 through 078, except 073\").","Mandatory reliance on an external document for method and corrective action (Requirement: \"Action in accordance with Israel Aircraft Industries Alert Service Bulletin 1124-54A-247\").","Short compliance window imposing operational scheduling pressure (Compliance: \"Within 50 hours time in service after 4 July 2001\").","Potential operational uncertainty because the AD requires \"verification of approved bolts\" without spelling out pass/fail criteria in the AD itself (Background: \"These bolts are not approved and are considered as fatigue critical\").","Regulatory enforcement delegated to CASA (opening paragraph: AD issued by CASA delegate under subregulation 39.1(1) of CAR 1998), creating binding legal obligation on operators.","Cross-reference to a foreign regulator's AD (Note: \"Israel CAA AD 54-01-05-02 refers\"), which may require operators to consult multiple authority documents."],"plain_english_summary":"This Airworthiness Directive requires operators of Israel Aircraft Industries 1125 (Astra) aeroplanes, serial numbers 004–078 (except 073), to verify that approved engine inlet cowl and aft nacelle attachment bolts are installed, following Israel Aircraft Industries Alert Service Bulletin 1124‑54A‑247. The check must be completed within 50 hours time in service after 4 July 2001. The CASA delegate issued the AD; aircraft operators must perform the inspection and any corrective work required by the service bulletin."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive addressing a specific unsafe condition (unapproved bolts on specific aircraft). It has not expanded beyond its original purpose of mandating inspection/replacement of non-conforming fasteners on the specified aircraft model."},"complexity_factors":["Very short document (1 page)","Only 3 defined elements: applicability (specific aircraft serial numbers), requirement (single reference to manufacturer bulletin), and compliance (single time limit)","No nested conditions or exceptions beyond the serial number exclusion (073)","No cross-references to other legislation beyond the enabling regulation (CAR 1998 subreg 39.1(1)) and a note about related Israeli aviation authority directive","Straightforward command structure: if your plane is on the list, do the action by the deadline"],"plain_english_summary":"The Civil Aviation Safety Authority requires owners/operators and maintenance engineers of Israel Aircraft Industries Model 1125 Astra (S/N 004–078, except 073) to inspect and replace incorrect AN3 bolts on engine cases.  \n\nWork must follow Israel Aircraft Industries Alert Service Bulletin 1124-54A-247 and be completed within 50 flying hours after 4 July 2001. The action prevents fatigue cracking that could let engine cowls or nacelles detach in flight, posing serious safety risks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts","history":"/api/acts/ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts/history","analysis":"/api/acts/ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts/analysis","conflicts":"/api/acts/ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts/conflicts","importantCases":"/api/acts/ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts/important-cases","documents":"/api/acts/ad-iai-a-10-engine-inlet-cowl-and-aft-nacelle-attachment-bolts/documents"}}