What was found
AIRCRAFT WAS GROUNDED. AIR INTERRUPT DURING CRUISE, NR 1 ENGINE GENERATOR OFF LIGHT CAME ON, VOLTS NORMAL. BETWEEN 1801 AND RED LINE DISCONNECTED IAW QRH. MAINTENANCE R & R NR 1 ENGINE GENERATOR IAW AMM 24-20-01 AND NR 1 ENGINE CONSTANT SPEED DRIVE OIL COOLER IAW AMM 24-10-01. LEAK AND OPS CHECKS NORMAL, ALSO AALA20160624007.