Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 45; Flight Crew Total 2100; Flight Crew Type 550
Aircraft Equipment Problem Less Severe; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Fuel Issue
Aircraft Equipment Problem Dissipated; Flight Crew Became Reoriented; Flight Crew Returned To Clearance; General Maintenance Action
Aircraft
Aztec developed sudden right engine loss of power; likely due to fuel issue; but investigating now. Fuel flow dropped; aux pump activated and fuel tanks changed. While in IFR conditions; descended unintentionally to 8;000-8;500 ft; regained control; and reclimbed to 9;000. Event recurred 1 time within 10 min; and engine then regained power.Requested 5;000 for duration of trip into VFR conditions at destination; rather than immediate landing into poor visibility and unfamiliar; small airport; as engine condition had stabilized. Landed uneventfully at ZZZ and plane to go for evaluation [3 days later]. I suspect fuel line issue; or possible ice crystal formation in line? All sumps tested pre and post flight; with no water discovered.
PA23 pilot experienced an unexplained power loss on the right engine at 9;000 feet. The aircraft was allowed to descend from assigned altitude while troubleshooting before engine power was restored and assigned altitude was regained. The event repeated within ten minutes; but the reporter elected to continue to the destination with VFR weather.