As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/MRT - FLT 6388 - DURING TAXI ON 12-4-98 AT 0715 HRS, AIRCRAFT RETURNED TO GATE DUE TO FORWARD EMERGENCY TRACK LIGHTS INOPERABLE. MAINTENANCE INSPECTED AND REMOVED AND REPLACED BATTERY PACK. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)