What was found
ENROUTE, LEFT ENGINE OUTLET AND RISE WENT TO FULL SCALE HIGH. DISCONNECTED CONSTANT SPEED DRIVE. NR 1 GENERATOR FAILURE AND APU WOULD NOT START. EMERGENCY WAS DECLARED, FLIGHT DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE CENTRIFUGAL SWITCH ON APU AND PERFORMED SATISFACTORY OPS CHECK IAW AMM 49-60-01. REPLACED THE CONSTANT SPEED DRIVE, OIL COOLER, AND GENERATOR IAW AMM 24-10-01, 24-10-03, AND PERFORMED SATISFACTORY OPS CHECK. AIRCRAFT WAS GROUNDED