As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEN 2 SOURCE OFF LIGHT ILLUMINATED AT FL300 IN DESC FOLLOWED QRH. DID NOT RESET. STARTED APU PUT ON THE BUS. ACFT GROUNDED. SWAPPED GCU'S AND RAN NR 2 ENGINE GEN WOULD NOT COME ON LINE. IDG FAULT LIGHT ON GCU. CLEARED FAULTS AND RETURNED GCU'S TO ORIGINAL LOCATIONS. PERFORMED AMM TASK 24-11-11-090-801C3, NO DEFECTS NOTED. REPLACED NR 2 IDG REF AMM 24-11-11, LEAK CHECK AND OPS TEST GOOD.