As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: FAULT MESSAGE CROSS AISLE LT/EPSU(13WL) AFT L DISPLAYED DURING SYSTEM TEST - MAINTENANCE FOUND LAMP OUT IN SIDE WALL EXIT SIGN 90WL5 AT THE L2 DOOR AND REPLACED THE LAMP - A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED