{"id":"F2006B05697","name":"AD/PA-31/110 Amdt 3 - Emergency Electrical Fuel Pumps","slug":"ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135493,"registerId":"commonwealth-F2006B05697-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-31/110 Amdt 3 - Emergency Electrical Fuel Pumps","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)  \nPiper PA-31 Series Aeroplanes\n\nAD/PA-31/110\n\nAmdt 3\n\n  \nEmergency Electrical Fuel Pumps 12/90\n\nApplicability: All models PA-31, PA31-300, PA-31-325, PA-31-350, PA-31P-350 and PA-31-\n\n350T1020, fitted with emergency fuel pumps part nos 42113-02, 42113-05 and 42113-06.\n\nRequirement: a. Recondition the emergency fuel pumps, and in addition replace the blade retaining rings; in accordance with the aircraft manufacturer’s Maintenance Manual, or\n\nb. Replace the emergency fuel pumps blade retaining rings in accordance with the aircraft manufacturer’s Maintenance Manual.\n\nCompliance: Within 2000 hours aircraft time in service since new or reconditioned, thereafter at intervals of 2000 hours aircraft time in service, or for those fuel pumps which have achieved more than 2000 hours aircraft time in service after 28 February 1986, within 100 hours aircraft time in service after 31 March 1986, and thereafter at intervals of 2000 hours aircraft time in service.\n\nBackground: Reports have been received of loss of engine power caused initially by the failure of the emergency fuel pump blade retention ring. Pieces of the ring travel through the fuel system and lodge in the engine driven fuel pump, causing it to fail.\n\nAmendment 2 is raised to allow replacement of the fuel pump retaining ring without overhauling the pump and to extend compliance. Loss of the emergency pump will not affect overall system safety, provided the retaining ring is intact.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1502},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The directive has evolved from its original form to provide more flexible maintenance options. It now permits operators to replace only the blade retaining ring without undertaking a full pump overhaul (previously likely mandated complete reconditioning), and extends compliance intervals to 2,000-hour cycles rather than requiring more frequent maintenance."},"complexity_factors":["Dual compliance pathways allowing either full reconditioning or ring replacement only","Time-based compliance calculations tied to specific historical cutoff dates (28 February 1986 and 31 March 1986)","Specific part number applicability limiting the directive to three specific pump models","Conditional logic differentiating between pumps based on accumulated flight hours since manufacture or last reconditioning"],"plain_english_summary":"This Airworthiness Directive requires owners of certain Piper PA‑31 series aircraft fitted with emergency fuel pumps (P/N 42113‑02, ‑05, or ‑06) to address a defect where blade retaining rings can fail and send metal into the fuel system, risking engine power loss.\n\nOwners must either overhaul the pump and replace the retaining ring or replace the ring alone, per the manufacturer’s manual. Intervals: every 2,000 flight hours; pumps over 2,000 hours by Feb 1986 required action within 100 hours, then every 2,000 hours."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps","history":"/api/acts/ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps/history","analysis":"/api/acts/ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps/analysis","conflicts":"/api/acts/ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps/conflicts","importantCases":"/api/acts/ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps/important-cases","documents":"/api/acts/ad-pa-31-110-amdt-3-emergency-electrical-fuel-pumps/documents"}}