PA-31 Navajo/Chieftan/Mojave/T1040
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 150; Flight Crew Total 3700; Flight Crew Type 1200
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition; Flight Crew Diverted
Aircraft
Flying level at 17;000 ft; left fuel pressure gauge indicated over 70 psi (off the scale); but several fuel flows; EGT; CHT were normal; including the ability to lean ROP. When the fuel indicator showed left tank less than expected; ATC was contacted requesting nearby airports with at least 3500 ft. He asked souls onboard and I answered 5 and fuel on board. I think I indicated that we should have had at least 2.5 hours of fuel and that was why I wanted to make a precautionary landing. Right after answering him left engine surged and then quit. I feathered the prop and [advised ATC] and was given vectors to ZZZ. A single engine landing and taxi was made to the FBO; at which time they removed cowling and subsequently found fuel line had come loose. Repairs were made at that time and no further damage was noted. Flight was continued and no further issues arose.
PA31 pilot reported that the fuel pressure was indicating very high then an engine surged; then quit.