What was found
ON TAXIOUT, THE LT GEN TRIPPED OFF LINE, DRIVE LITE ILLUMINATED. HAD CREW DISCONNECT IDG AND VERIFIED 0 VOLTS AND FREQS. SERVICED APU OIL PRIOR TO DEPT. SERVICED #1 IDG OIL FOUND FULL. RECONNECTED IDG, BUT STILL HAD DRIVE LIGHTS PRIOR TO ENG RUN FOR DEF. HAD FOLLOWING AUTO EVENTS DC-A= 22, DC-V=28, IDGOUT 90, IDG RISE 9. ON BPCU HAD DISCONNECT TRIP WITH NO OTHER FAULTS. REPLACED NR1 GCU NO HELP. REPLACED IDG, LEAK CHECKED ENG. ADJ IDG AND TESTED PER MM. CK'D OKAY.