As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN UNRELATED MX GROUND RUN, THE NR1 IDG OVERHEATED, A BOLT AND A O-RING ON THE GENRERATOR MODULE FAILED, AND THE LUBRICATING OIL SPRAYED UNDER HIGH PRESSURE ONTO THE CORE OF AN OPERATING ENGINE. THE ENGINE WAS IMMEDIATELY SHUTDOWN. THERE WAS A LARGE SMOKE CLOUD BUT NO FIRE NOTED VISUALLY OR BY INDICATION.