As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6371 - EWR-IAD - DURING TAXI, AIRCRAFT RETURNED TO GATE DUE TO FORWARD FIRE EXTINGUISHER MISSING RED SAFETY TAB. MAINTENANCE FERRIED AIRCRAFT TO IAD. MAINTENANCE INSPECTED AND REMOVED AND REPLACED FWD FIRE EXTINGUISHER, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)