{"id":"F2022L00613","name":"AD/YA-1/3 Wing Rear Spars - Modification","slug":"ad-ya-1-3-wing-rear-spars-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":102421,"registerId":"commonwealth-F2022L00613-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Yeoman Aircraft YA-1 Series Aeroplanes","sectionType":"part","heading":"Yeoman Aircraft YA-1 Series Aeroplanes","content":"# Yeoman Aircraft YA-1 Series Aeroplanes\n\n| AD/YA-1/3 | Wing Rear Spars - Modification | 8/2022 |\n| --------- | ------------------------------ | ------ |\n\n| Applicability: | All models of Yeoman Aircraft YA-1 series aircraft.                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Modify the port and starboard wing rear spars at the inner flap hinge bracket attachment, in accordance with Yeoman Aircraft Drawing YA-1/156, as in force on the commencement date of this AD, or a design of a modification of the port and starboard wing rear spars approved under Part 21 of the Civil Aviation Safety Regulations 1998 (CASR), as in force from time to time. |\n| Compliance:    | Within 90 days after the commencement date of this AD, unless previously accomplished.                                                                                                                                                                                                                                                                                              |\n|                | This AD commences on 29 April 2022.                                                                                                                                                                                                                                                                                                                                                 |\n| Background:    | This AD is being re-made under Part 39 of the Civil Aviation Safety Regulations 1998 because an example of the aircraft type, for which Australia is the State of Design, has returned to the Australian aircraft register and the AD had previously lapsed due to the Legislation Act 2003.                                                                                        |\n\n![Text\nDescription automatically generated](image.001.jpeg)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n14 April 2022","sortOrder":0},{"sectionNumber":"AD/YA-1/3","sectionType":"part","heading":"AD/YA-1/3","content":"## AD/YA-1/3","sortOrder":1},{"sectionNumber":"Wing Rear Spars - Modification","sectionType":"part","heading":"Wing Rear Spars - Modification","content":"## Wing Rear Spars - Modification","sortOrder":2},{"sectionNumber":"8/2022","sectionType":"part","heading":"8/2022","content":"## 8/2022","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward re-making of an existing Airworthiness Directive to maintain legal force. The scope remains exactly as originally intended: mandating a specific structural modification to Yeoman YA-1 aircraft. The background explains the administrative reason for re-issue (aircraft returning to register + previous lapse under Legislation Act timing rules), but this does not expand the substantive scope beyond the original safety purpose."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement with clear technical reference (Drawing YA-1/156)","Single compliance deadline with straightforward exception ('unless previously accomplished')","Minimal defined terms — only standard aviation acronyms (AD, CASR, Part 21)","No nested conditions or cross-references to other legislation beyond the standard CASR reference for alternative approvals"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Yeoman Aircraft YA-1 aeroplanes in Australia to modify the rear wing spars at the inner flap hinge bracket attachment, using drawing YA-1/156 or an approved alternative. \n\nIt must be done within 90 days of 29 April 2022. The AD was re‑issued because the type has returned to Australia’s register and the earlier notice had lapsed under timing rules."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument restores a pre-existing requirement rather than expanding its reach. It continues to apply to all Yeoman YA-1 series aeroplanes and keeps the same mechanical modification obligation (modify port and starboard rear spars per Drawing YA-1/156 or an approved Part 21 alternative) with a 90‑day compliance window from 29 April 2022."},"complexity_factors":["Single, well-defined physical modification (wing rear spars at inner flap hinge) reduces technical complexity.","Universal applicability to all YA-1 models simplifies applicability determinations.","Short, fixed compliance window (90 days from 29 April 2022) imposes operational scheduling pressure.","Permitted use of alternative designs requires regulatory approval under Part 21 (adds administrative and approval complexity).","Mandatory reference to a specific drawing “as in force on commencement date” creates version-control and document-definition issues.","Administrative history (AD being re-made due to prior lapse under the Legislation Act 2003) may require operators to trace prior records."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of all Yeoman Aircraft YA-1 series aeroplanes to modify both port and starboard wing rear spars at the inner flap-hinge bracket, following Yeoman Drawing YA-1/156 or an alternative design approved under Part 21 CASR. Work must be completed within 90 days of 29 April 2022. The AD is a re‑made requirement after the earlier AD lapsed when an example of the type returned to the Australian register."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ya-1-3-wing-rear-spars-modification","history":"/api/acts/ad-ya-1-3-wing-rear-spars-modification/history","analysis":"/api/acts/ad-ya-1-3-wing-rear-spars-modification/analysis","conflicts":"/api/acts/ad-ya-1-3-wing-rear-spars-modification/conflicts","importantCases":"/api/acts/ad-ya-1-3-wing-rear-spars-modification/important-cases","documents":"/api/acts/ad-ya-1-3-wing-rear-spars-modification/documents"}}