As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3942, DURING TAXI CREW REPORTS EMERGENCY FLOOR LIGHTING SYSTEM FROM EXIT ROW BACK INOPERATIVE. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLY NR 4 IAW EMB 145 AMM 33-50-04. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE