{"id":"F2006B05686","name":"AD/PA-31/100 - Fuel Scavenge Pump Check Valves","slug":"ad-pa-31-100-fuel-scavenge-pump-check-valves","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135457,"registerId":"commonwealth-F2006B05686-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/100 - Fuel Scavenge Pump Check Valves","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)  Piper PA-31 Series Aeroplanes\n\n \n\nAD/PA-31/100 Fuel Scavenge Pump Check Valves 2/82\n\nApplicability: Model PA-31T with S/Nos. 31T-7400002 to 31T-8120056. Model PA-31T1 with S/Nos. 31T-7804001 to 31T-8104067. Model PA-31T2 with S/Nos. 31T-8166001 to 31T-8166029.\n\n \n\nRequirement: Action in accordance with Piper SB No. 734. Compliance:  Within 100 hours time in service after 28 February 1982.\n\nBackground:  The Manufacturer considers it essential to relocate the fuel scavenge pump check valves to a position aft of the firewall. This will eliminate a source of flame propagation in the event of a broken fuel line at the present location.\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\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":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2295},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive remains focused on its original narrow purpose: correcting a specific fire safety defect in defined Piper aircraft models. There is no indication of scope expansion beyond the original airworthiness safety intent."},"complexity_factors":["Requires cross-referencing an external technical document (Piper Service Bulletin No. 734) for actual implementation details","Applicability limited to specific aircraft serial number ranges requiring verification against aircraft logs","Compliance measured in 'hours time in service' (flight hours) rather than calendar dates","Straightforward single-action requirement with no exceptions or conditional pathways"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Piper PA-31T, PA-31T1, and PA-31T2 aircraft (listed serial numbers) to relocate the fuel scavenge pump check valves aft of the firewall, following Piper Service Bulletin No. 734. The mandatory modification must be done within 100 flight hours after 28 February 1982 to eliminate a fire hazard from the valves' original forward location."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-100-fuel-scavenge-pump-check-valves","history":"/api/acts/ad-pa-31-100-fuel-scavenge-pump-check-valves/history","analysis":"/api/acts/ad-pa-31-100-fuel-scavenge-pump-check-valves/analysis","conflicts":"/api/acts/ad-pa-31-100-fuel-scavenge-pump-check-valves/conflicts","importantCases":"/api/acts/ad-pa-31-100-fuel-scavenge-pump-check-valves/important-cases","documents":"/api/acts/ad-pa-31-100-fuel-scavenge-pump-check-valves/documents"}}