As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GNDED. DURING TAXI FROM HANGAR 2 TO HANGAR 1, TAXI CREW REPORTED THAT THE CEILING EMER EXIT LIGHT OVER THE OVERWING EMER EXIT WILL NOT EXTINGUISH. R & R EMER LIGHT BATTERY PACK B5-104. OPERATIONAL CHECKED NORMAL IAW AMM 33-53-00.