{"id":"F2006B03862","name":"AD/BEECH 35/66 Amdt 1 - Engine Fuel Metering Unit","slug":"ad-beech-35-66-amdt-1-engine-fuel-metering-unit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43471,"registerId":"commonwealth-F2006B03862-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/66 Amdt 1 - Engine Fuel Metering Unit","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)  \nBeechcraft 35 (Bonanza) Series Aeroplanes\n\nAD/BEECH 35/66\n\nAmdt 1\n\n  \nEngine Fuel Metering Unit 9/96\n\nApplicability: Turbocharged Bonanza S35, V35, V35A and V35B aircraft serial numbers D-7140 and D-7310 through D-10403 that are equipped with TCM TSIO-520D engines.\n\nRequirement: To reduce the possibility of a fuel leak which could result in an engine compartment fire, carry out the requirements detailed in Beechcraft Mandatory Service Bulletin (MSB) Number 2420 Revision 1, \"Accomplishment Instructions\", Parts II and III.\n\nNote: FAA Airworthiness Directive 92-17-01 refers.\n\nCompliance: Effective 15 August 1996:\n\n    Beechcraft MSB No. 2420 Rev.1, \"Accomplishment Instructions\" Part II; within 50 hours time in service.\n\n    2. Beechcraft MSB No. 2420 Rev.1, \"Accomplishment Instructions\" Part III; at intervals not to exceed 130 hours time in service.\n\nBackground: This directive was originally issued in March 1993 to require the inspection and modification of the engine fuel metering unit. The requirement was published to reduce the possibility of a fuel leak which could result in an engine compartment fire. This amendment introduces a requirement to fit a fuel metering unit drain hose with a higher temperature tolerance material and a requirement to carry out a repetitive inspection of that drain hose.\n\nThe original issue of this Airworthiness Directive became effective on 4 March 1993.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of addressing fuel metering unit fire risks. It adds incremental requirements (better drain hose material + repetitive inspections) but does not expand to unrelated aircraft systems or new aircraft types."},"complexity_factors":["Single, clearly defined applicability clause (specific aircraft models and serial numbers)","Two straightforward compliance requirements with clear timeframes (50 hours and 130 hours)","No defined terms section or interpretation provisions","No cross-references to other legislation (only references to a Beechcraft service bulletin and FAA directive for context)","Plain language background section explaining the safety rationale","Short document (approximately 200 words)"],"plain_english_summary":"This airworthiness directive requires owners/operators of certain turbocharged Beechcraft Bonanza 35-series airplanes (with TCM TSIO-520D engines in the listed serial-number range) to fit a higher–temperature drain hose on the engine fuel metering unit and to inspect that hose at recurring intervals. It’s a mandatory safety fix to stop fuel leaks that can lead to engine compartment fires."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment expands the original 1993 directive by adding a requirement to fit a fuel metering unit drain hose made of higher temperature‑tolerant material and by imposing repetitive inspections of that drain hose, in addition to the prior inspection/modification requirements."},"complexity_factors":["Narrow, specific applicability by airframe serial numbers and engine model (requires verification of eligibility).","Dependence on an external technical document: Beechcraft Mandatory Service Bulletin No. 2420 Revision 1 (Parts II and III) is mandatory for compliance.","Mixed requirement types: a one‑off modification (fit higher‑temperature drain hose) plus repetitive inspections (recurring compliance at set intervals).","Defined compliance timeframes (effective date and short service-hour windows) require scheduling and record-keeping.","Cross-reference to an FAA Airworthiness Directive as related technical background increases multi-jurisdictional tracing for maintainers."],"plain_english_summary":"This airworthiness directive requires owners/operators of specific turbocharged Beechcraft Bonanza S35/V35 series aeroplanes (listed serial numbers fitted with TCM TSIO-520D engines) to install a higher-temperature fuel metering unit drain hose and to perform repeated inspections of that hose. The stated purpose is to reduce the risk of a fuel leak that could lead to an engine compartment fire. Compliance imposes a one‑off retrofit cost and ongoing inspection time on affected aircraft operators."},"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-beech-35-66-amdt-1-engine-fuel-metering-unit","history":"/api/acts/ad-beech-35-66-amdt-1-engine-fuel-metering-unit/history","analysis":"/api/acts/ad-beech-35-66-amdt-1-engine-fuel-metering-unit/analysis","conflicts":"/api/acts/ad-beech-35-66-amdt-1-engine-fuel-metering-unit/conflicts","importantCases":"/api/acts/ad-beech-35-66-amdt-1-engine-fuel-metering-unit/important-cases","documents":"/api/acts/ad-beech-35-66-amdt-1-engine-fuel-metering-unit/documents"}}