As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6286 - IAD-CMH - DURING TAXI FOR TAKEOFF, RETURNED TO GATE DUE TO THE LEFT ENGINE FLAMING OUT DURING TAXI WITH NO POWER OR CONDITION LEVER MOVEMENT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE INVESTIGATED AND FOUND THE FUEL PUMP DRIVE GEAR SHEARED. MAINTENANCE CHANGED THE ENGINE. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)