As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING EMERGENCY POWER SUPPLY UNIT SYSTEM TEST THE FOLLOWING MESSAGES DISPLAYED: EXIT SIGNS/EPSU(11WL)EXT L , EXIT SIGNS/EPSU(13WL)AFT L, FPEEPMS CROSS AISLE LT/EPSU(13W)AFT L, EXIT SIGNS/EPSU(12WL)EXT R AND FPEEPMS CROSS AISLE LT/EPSU(12WL)EXT R OBSERVED. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 11WL PER AMM 33-51-38 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO FAULTS NOTED. ALL EMERGENCY POWER SUPPLY UNITS AND EMERGENCY LIGHTING PASSED THE FUNCTIONAL TEST WITH NO ISSUED NOTED.