As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT EXPERIENCED LEFT ENGINE ROLL BACK TO IDLE, ENROUTE. INVESTIGATION REVEALED FRACTURED P3 AIR DELIVERY TUBE (PN 3027791) AT THE TUBE/FERRULE JOINT (B) NUT ON THE FUEL CONTROL UNIT. THE P3 TUBE WAS REPLACED AND AIRCRAFT WAS RETURNED TO SERIVCE.