As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ADVANCING THRUST FOR TAKEOFF, A REPORT WAS RECEIVED FROM ANOTHER AIRCRAFT THAT FLAMES WERE OBSERVED FROM TAILPIPE AND SIDE OF ENGINE. ENGINE INDICATIONS WERE NORMAL. AFTER EXITING RUNWAY AND SECURING THE ENGINE, FIRE CHIEF REPORTED NO INDICATION OF FIRE OR SMOKE. ACCOMPLISHED FIM 71-05-00-810-811-F00. FOUND THE ENGINE TO BE ACCEPTABLE FOR CONTINUED SERVICE. THE AIRCRAFT WAS GROUNDED.