What was found
NR 2 ENGINE GENERATOR OFF BUSS BLUE LIGHT AND NR 2 SOURCE OFF AMBER CAME ON IN FLIGHT WITH ASSOCIATED ELECTRICAL AMBER MASTER CAUTION LIGHT. PERFORMED QRH PROCEDURE AND NR 2 ENGINE GENERATOR OFF BUSS BLUE LIGHT REMAINED ON, AS WELL AS AMBER SOUCE LIGHT. STARTED APU PLACED ON RT BUSS SOURCE LIGHT OUT. NR 2 ENGINE GENERATOR OFF BUSS LIGHT STAYS ON. REMOVED NR 2 IDG IAW AMM TASK 24-11-11-090-801-C3. FLUSHED CIRCUIT IAW 12-13-21-600-802. R & R NR 2 IDG AIR/OIL COOLER IAW AMM 24-11-21-400-801. R & R NR 2 IDG OIL COOLER IAW 73-11-06-400-801-F00. REPLACED NR 2 IDG IAW 24-11-11-400-801. OPERATED NR 2 ENGINE & PERFORMED OPS CK OF THE NR 2 IDG IAW 24-11-00-700-803 & OPS NORMAL. PERFORMED TASK 71-00-00-700-801-F00 TEST 3A & NO LEAKS NOTED.