What was found
AIRCRAFT WAS GROUNDED: ON START OF NR 2 ENGINE, ENGINE NR 2 FAILED, INDICATED WITH VISIBLE FLAMES IN THE TAILPIPE. FLIGHT RETURNED TO GATE DUE TO POSSIBLE FIRE IN ENGINE DURING START UP. EMERGENCY TEAMS RESPONDED AS A PRECAUTION AND FLIGHT RETURNED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED TSM 71-00-00-910-902, NO LEAKS NOTED, AND RAN ENGINE, NO FAULTS NOTED. MAINTENANCE ALSO PERFORMED SATISFACTORY OPERATIONAL CHECK.