What was found
SJO - FLT LR626 - AFTER TAKEOFF, NR 1 ENGINE EXPERIENCED A FLAMEOUT, DUE TO THIS SITUATION THE ENGINE WAS SHUTDOWN (IFSD), AND THE AIRCRAFT RETURNED TO SJO AIRPORT. AFTER AN UNEVENTFUL LANDING, MAINTENANCE TECHNICIANS PERFORMED COMPLETE INSPECTION OF ENGINE NR 1 AND FOUND THE FUEL PUMP SHAFT DAMAGED. REMOVED AND REPLACED FUEL CONTROL UNIT AND FUEL PUMP AS PER AMM 73-11-1. ALSO, BORESCOPE INSPECTION WAS PERFORMED AS PER PWA 72-00 AND FOUND THE ENGINE WITHOUT INTERNAL DAMAGES. ENGINE RUNUP WAS PERFORMED AS PER AMM 71-00 WITH NORMAL RESULTS. THE AIRCRAFT RETURNED TO NORMAL OPERATIONS. (M)