As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS UPON REACHING TAKEOFF THRUST, R GEN DRIVE DISCONNECT ILLUMINATED. (ASSOCIATED R GEN OFF AND L 7 R UTILITY BUSS OFF). FOLLOWED QRH PROCEDURE FOR R GEN DRIVE DISCONNECT. MAINTENANCE REMOVED/REPLACED RIGHT IDG IAW AMM:24-11-01. OPS CHECK, LEAK CHECK GOOD.