{"id":"F2022L00611","name":"AD/YA-1/6 Pilot’s Safety Harness Attachment - Modification","slug":"ad-ya-1-6-pilot-s-safety-harness-attachment-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":102419,"registerId":"commonwealth-F2022L00611-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-1/6 | Pilot’s Safety Harness Attachment - Modification | 8/2022 |\n| --------- | ------------------------------------------------ | ------ |\n\n| Applicability: | All Yeoman Aircraft YA-1 250 and YA-1 250R model aircraft with any of serial numbers 1 to 116 inclusive.                                                                                                                                                                                     |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Modify the pilot’s safety harness in accordance with the technical requirements of Yeoman Aircraft Service Bulletin YA1‑SB‑006 dated 16 December 1964, as in force on the commencement date of this AD.                                                                                      |\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-1/6","sectionType":"part","heading":"AD/YA-1/6","content":"## AD/YA-1/6","sortOrder":1},{"sectionNumber":"Pilot’s Safety Harness Attachment - Modi","sectionType":"part","heading":"Pilot’s Safety Harness Attachment - Modification","content":"## Pilot’s Safety Harness Attachment - 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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope not changed from the original requirement: the AD re‑issues the prior mandatory modification for the same YA‑1 250/250R serial range. The re‑making addresses a procedural lapse (Background) but does not expand or narrow applicability or the core technical requirement; compliance remains modification per YA1‑SB‑006 within 90 days of commencement (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability to a limited set of airframes (YA‑1 250 and YA‑1 250R, serials 1–116) creates concentrated compliance obligations for a small group of owners/operators (Applicability).","Mandatory action is defined by an external historic technical document (Yeoman Aircraft Service Bulletin YA1‑SB‑006 dated 16 Dec 1964), so operators must obtain and follow that bulletin to comply (Requirement).","\"As in force on the commencement date\" language means the precise technical standard depends on the bulletin version recognised at commencement, introducing source/version uncertainty (Requirement).","Short compliance window: 90 days from commencement (29 April 2022) imposes a practical scheduling and cost burden on owners/operators to arrange parts/works quickly (Compliance).","Administrative re‑issue under Part 39 due to a prior lapse is a procedural nuance rather than a substantive change, but may require affected owners to revisit prior compliance records (Background).","Regulatory discretion is limited — the AD prescribes a specific modification route rather than offering alternatives, but relies on the external bulletin for engineering detail (Requirement/Compliance)."],"plain_english_summary":"This AD requires owners/operators of Yeoman Aircraft YA‑1 250 and YA‑1 250R with serial numbers 1–116 to modify the pilot’s safety harness per Yeoman Aircraft Service Bulletin YA1‑SB‑006 (dated 16 Dec 1964), within 90 days of the AD’s commencement (29 April 2022). CASA re‑made the AD under Part 39 because an example of the type returned to the Australian register after the prior AD had lapsed."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward re-making of an existing Airworthiness Directive. The scope remains limited to the specific aircraft models and the specific safety harness modification originally intended. The re-issue is purely procedural (addressing lapse under the Legislation Act 2003) rather than an expansion of regulatory scope."},"complexity_factors":["Single, specific applicability criterion (serial numbers 1–116 of two specific models)","Single requirement referencing an external technical document (Service Bulletin YA1‑SB‑006)","Simple compliance timeframe (90 days from commencement)","No defined terms section","No nested exceptions or conditional logic","Straightforward background explanation without cross-references to other legislation beyond the enabling regulation (Part 39 of CASR 1998)"],"plain_english_summary":"This AD mandates modification of the pilot’s safety harness on Yeoman Aircraft YA‑1 250 and YA‑1 250R (serials 1–116) per Yeoman Service Bulletin YA1‑SB‑006 (16 Dec 1964). It affects owners, operators and maintenance organisations of those aircraft and must be done within 90 days of commencement (29 Apr 2022). The rule reinstates a prior requirement after one aircraft returned to the Australian register."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ya-1-6-pilot-s-safety-harness-attachment-modification","history":"/api/acts/ad-ya-1-6-pilot-s-safety-harness-attachment-modification/history","analysis":"/api/acts/ad-ya-1-6-pilot-s-safety-harness-attachment-modification/analysis","conflicts":"/api/acts/ad-ya-1-6-pilot-s-safety-harness-attachment-modification/conflicts","importantCases":"/api/acts/ad-ya-1-6-pilot-s-safety-harness-attachment-modification/important-cases","documents":"/api/acts/ad-ya-1-6-pilot-s-safety-harness-attachment-modification/documents"}}