{"id":"F2006B07492","name":"AD/TSA-600/27 - Aerosonic Fuel Flow Transducers - Inspection and Replacement","slug":"ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49947,"registerId":"commonwealth-F2006B07492-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TSA-600/27 - Aerosonic Fuel Flow Transducers - Inspection and Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes\n\n \n\n# AD/TSA-600/27 Aerosonic Fuel Flow Transducers - Inspection\n\nand Replacement\n\nApplicability: All Piper Aerostar Models 600, 601 and 601P.\n\n# 11/80\n\n \n\nRequirement: 1. Inspect all installed Aerosonic Fuel Flow Transducers for fuel leaks in the area where the transducer cap and body are bonded together.\n\n \n\n2.    (a) Replace all Aerosonic Fuel Flow Transducers P/N 33184-1 and 32622-6 (except those with the word “FLO-SCAN” marked on bottom of transducer) and install Aerosonic replacement units identified with\"FLO-SCAN\" S/Nos. 5000 and up.\n\n \n\n(b)     Torque fittings to 25-30 ft. Lbs.\n\n \n\n(c)     Perform a system leak check.\n\n \n\nNote: FAA AD 80-17-04 Amdt. 39-3873 and Aerosonic Service Bulletins Nos. 1 and 2 refer.\n\n \n\nCompliance: Inspect within 25 hours time in service after 13 October 1980 and thereafter every 25 hours time in service until replaced in accordance with para. 2 above. Transducers revealing fuel leaks in the area quoted in para. 1 above must be replaced before further flight.\n\n \n\nBackground: There is evidence to suggest that the quoted Aerosonic fuel flow transducer caps may not be properly bonded in the transducer body and may separate from the body. One instance overseas of cap separation allowed fuel leakage and resulted in an engine compartment fire.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive remains tightly scoped to its original safety purpose: addressing a specific manufacturing defect in Aerosonic fuel flow transducers on Piper Aerostar 600/601 aircraft. The scope has not expanded beyond this original intent."},"complexity_factors":["Single, specific technical subject matter (one aircraft part on three specific aircraft models)","Only 2 main requirements with clear sub-steps (2a, 2b, 2c)","Minimal defined terms (only standard aviation abbreviations like P/N for part number, S/Nos for serial numbers)","No cross-references to other legislation or complex conditional logic","Straightforward compliance timeline (25 hours time in service)","Single exception noted (transducers marked \"FLO-SCAN\" on bottom are exempt from replacement)","Document length: approximately 300 words"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators/maintainers of Piper Aerostar 600/601/601P aircraft in Australia to inspect—and replace when necessary—Aerosonic fuel flow transducers after a manufacturing defect can allow the transducer cap to separate, causing fuel leaks and an engine‑fire hazard.  \n\nIt targets affected transducer models and mandates regular leak checks and replacement with improved units to eliminate the fire risk."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive is corrective and narrowly targeted: it applies to Aerosonic fuel-flow transducers on specified Piper Aerostar models and to identified part numbers, consistent with the instrument's stated purpose to address cap separation and fuel leakage (Applicability; Requirement; Background). It does not expand beyond those aircraft/parts or create new regulatory categories."},"complexity_factors":["Narrow applicability to specific aircraft models (Piper Aerostar 600, 601, 601P) (Applicability).","Specific affected part numbers and an explicit exception based on marking and serial number (Requirement 2(a)).","Serial procedural steps: inspect, replace, torque fittings to specified value, and perform leak check (Requirement 1 and 2(b)-(c)).","Short, repetitive compliance interval (inspect within 25 hours after 13 October 1980 and every 25 hours until replacement) and an operational grounding trigger if leakage found (Compliance).","Safety-critical mechanical detail (bond integrity of transducer cap to body) driving immediate replacement if defective (Background; Requirement 1).","Cross-reference to external FAA AD and manufacturer service bulletins, which may add procedures or parts information (Note)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Piper Aerostar models 600, 601 and 601P to inspect Aerosonic fuel-flow transducers for fuel leaks at the cap-body bond, replace specified transducer part numbers (P/N 33184-1 and 32622-6) unless marked “FLO-SCAN” (S/N 5000 and up), torque fittings to 25–30 ft·lb, and perform a system leak check. Inspections are every 25 hours until replaced; any unit leaking must be replaced before further flight. The stated purpose is to prevent cap separation and fuel leakage that has led to an engine-compartment fire."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement","history":"/api/acts/ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement/history","analysis":"/api/acts/ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement/important-cases","documents":"/api/acts/ad-tsa-600-27-aerosonic-fuel-flow-transducers-inspection-and-replacement/documents"}}