As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6550 - CHO-IAD - DURING TAXI, CREW BLEW BOTH FIRE BOTTLES ON RIGHT SIDE DUE TO RESIDUAL SMOKE DUE TO IMPROPER SHUT DOWN. BOTH BOOST PUMPS WERE LEFT ON AND PILOTS DID NOT MOTOR ENGINE THROUGH. AIRCRAFT WAS AT GATE, AND NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED FIRE BOTTLES AND FUEL SHUT OFF VALVE, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)