As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT AT 35000 GEN 2 "SOURCE OFF" AND "GEN OFF BUS" LIGHTS ILLUMINATED. PER QRH WOULD NOT RECONNECT, STARTED APU SUCCESSFULLY TO COVER THE BUS. GROUNDED - YES. REPLACED #2 ENG IDG REF B737-900 AMM 24-11-11. OPS CHECK GOOD, NO LEAKS DETECTED.