What was found
LAX - LEFT ENGINE POWER LOSS FOLLOWED BY AUTO SHUT DOWN REPORTED ON CLIMB-OUT. CREW COMPLETED CHECKLIST PROCEDURES AND DECLARED EMERGENCY. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED LEFT ENGINE. AIRCRAFT RETURNED TO SERVICE. ON SUBSEQUENT ENGINE DISASSEMBLY FOUND DIAPHRAGM FIRST IDLER GEAR AND GEARCASE FIRST ACCESSORY IDLER GEAR TO HAVE EXPERIENCED GEAR TOOTH FAILURE. (M)