As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON TAXIWAY AIRCRAFT BEHIND SAID THEY SAW SIGNIFICANT FLAME AND SMOKE FROM )'1 ENGINE. WE HAD HIM DOUBLE CHECK AND WITH N1 UP TO 40)? HE SAID SMOKE AND FLAME INCREASED.THE AIRCRAFT RETURNED TO THE GATE WHERE MAINTENANCE INSPECTED ENGINE PER AMM 71-00-00 AND ACCOMPLISHED AN ENGINE RUN WITH NO DEFECTS NOTED.