{"id":"F2006B05736","name":"AD/PA-31/31 - Submerged Fuel Pumps - Inspection","slug":"ad-pa-31-31-submerged-fuel-pumps-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135548,"registerId":"commonwealth-F2006B05736-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/31 - Submerged Fuel Pumps - Inspection","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-31/31 Submerged Fuel Pumps - Inspection 7/74\n\nApplicability: Model PA-31P with S/Nos. 31P-1 to 31P-7400196. Document:  Piper SL No. 711.\n\nCompliance: Within 100 hours time in service after 31 July 1974 and thereafter at intervals not exceeding 100 hours time in service.\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\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1550},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This airworthiness directive maintains its original narrow scope targeting a specific aircraft type (PA-31P) and component (submerged fuel pumps) for mandatory recurring inspection."},"complexity_factors":["Single, unambiguous operative requirement","No legislative cross-references or defined terms within the instrument","Simple applicability test based on aircraft model and serial number","Reliance on external technical document (Piper Service Letter No. 711) for procedural details"],"plain_english_summary":"**What this is:** A safety directive requiring owners of specific Piper aircraft to inspect their fuel pumps regularly to prevent engine failures.\n\n**Who it affects:** Owners and operators of Piper PA-31P Navajo aeroplanes with serial numbers from 31P-1 to 31P-7400196 (specific older models manufactured up to 1974).\n\n**What you must do:**\n- Inspect the submerged fuel pumps (the pumps located inside the fuel tanks) for defects\n- Complete the first inspection within 100 hours of flying time after 31 July 1974\n- Repeat this inspection every 100 hours of flying time thereafter\n- Follow the specific procedures outlined in Piper Service Letter No. 711\n\n**Why it matters:** Fuel pumps sitting inside fuel tanks can develop faults that cause engine stoppage. Regular inspection prevents accidents by catching problems before they cause failure in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-31-submerged-fuel-pumps-inspection","history":"/api/acts/ad-pa-31-31-submerged-fuel-pumps-inspection/history","analysis":"/api/acts/ad-pa-31-31-submerged-fuel-pumps-inspection/analysis","conflicts":"/api/acts/ad-pa-31-31-submerged-fuel-pumps-inspection/conflicts","importantCases":"/api/acts/ad-pa-31-31-submerged-fuel-pumps-inspection/important-cases","documents":"/api/acts/ad-pa-31-31-submerged-fuel-pumps-inspection/documents"}}