{"id":"F2022L00610","name":"AD/YA-1/5 Main Fuel Filter and Auxiliary Fuel Pumps - Modification","slug":"ad-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":102418,"registerId":"commonwealth-F2022L00610-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-1/5 | Main Fuel Filter and AuxiliaryFuel Pumps - Modification | 8/2022 |\n| --------- | ------------------------------------------------------- | ------ |\n\n| Applicability: | All models of Yeoman Aircraft YA-1 250R with any of serial numbers 1 to 116 which have not carried out the technical requirements of Yeoman Aircraft Service Bulletin (SB) YA1‑SB-010 dated 26 January 1967, as in force on the commencement date of this AD.                                |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Relocate the main fuel filter and auxiliary fuel pump in accordance with the technical requirements of Yeoman Aircraft SB YA1‑SB‑007 dated 11 March 1965, 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-1/5","sectionType":"part","heading":"AD/YA-1/5","content":"## AD/YA-1/5","sortOrder":1},{"sectionNumber":"Main Fuel Filter and AuxiliaryFuel Pumps","sectionType":"part","heading":"Main Fuel Filter and AuxiliaryFuel Pumps - Modification","content":"## Main Fuel Filter and Auxiliary  \nFuel Pumps - Modification","sortOrder":2},{"sectionNumber":"8/2022","sectionType":"part","heading":"8/2022","content":"## 8/2022","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The re‑made AD restores the original requirement rather than expanding it. The technical obligation remains relocation per SB YA1‑SB‑007 and applicability remains serials 1–116 not previously compliant. The Background states the AD was re‑made under Part 39 because the earlier AD had lapsed when the type returned to the Australian register."},"complexity_factors":["Narrow applicability: applies only to YA‑1 250R serials 1–116 that have not carried out SB YA1‑SB‑010 (26 Jan 1967).","Single, specific technical action: relocation of main fuel filter and auxiliary fuel pump per SB YA1‑SB‑007 (11 Mar 1965), reducing interpretive ambiguity.","External-document dependence: compliance requires following an historical manufacturer Service Bulletin (YA1‑SB‑007), so access to and interpretation of that document is required.","Short compliance window: 90 days from commencement increases scheduling and downtime pressure on operators.","Administrative re-issue: AD is re-made under Part 39 because the prior AD lapsed when the type returned to the Australian register, creating procedural repetition rather than new substantive obligations.","Compliance evidence: operators must retain records to demonstrate the modification, imposing routine paperwork burden.","Limited regulatory discretion: the AD prescribes the technical standard (the SB) rather than delegating to broad regulator discretion, lowering legal uncertainty."],"plain_english_summary":"Requires relocation of the main fuel filter and auxiliary fuel pump on Yeoman Aircraft YA‑1 250R aeroplanes (serials 1–116) that have not already complied with Service Bulletin YA1‑SB‑010 (26 Jan 1967). The work must follow Yeoman Service Bulletin YA1‑SB‑007 (11 Mar 1965) and be completed within 90 days of this AD (commences 29 April 2022).\n\nCASA states the AD is re‑made to restore an earlier safety requirement after the original AD lapsed; the direct costs, downtime and recordkeeping fall on owners/operators who must arrange the modification."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — it applies only to specific vintage Yeoman YA-1 aircraft and addresses a specific fuel system modification. The re-making under Part 39 of CASR 1998 is procedural (reviving a lapsed directive) rather than an expansion of scope."},"complexity_factors":["Single, specific applicability criterion (serial numbers 1–116, excluding those with 1967 service bulletin)","One clear technical requirement referencing an external document (1965 service bulletin)","Simple compliance deadline (90 days from commencement)","No defined terms section, no cross-references to other legislation beyond the enabling regulations (Part 39 of CASR 1998)","Background explanation is straightforward historical context"],"plain_english_summary":"This AD mandates that owners/operators of Yeoman Aircraft YA-1 250R (serials 1–116) that did not receive the 1967 service update must relocate the main fuel filter and auxiliary fuel pumps per the 1965 service bulletin. Compliance was required within 90 days of 29 April 2022.\n\nIt was reissued because one of these rare Australian-designed aircraft returned to the register; the modification remedies a fuel-system placement safety risk for continued operation."},"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-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification","history":"/api/acts/ad-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification/history","analysis":"/api/acts/ad-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification/analysis","conflicts":"/api/acts/ad-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification/conflicts","importantCases":"/api/acts/ad-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification/important-cases","documents":"/api/acts/ad-ya-1-5-main-fuel-filter-and-auxiliary-fuel-pumps-modification/documents"}}