As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: L4 DOOR EMERGENCY POWER SUPPLY UNIT FAULT SHOWN DURING TESTING. REPLACED L4 DOOR SLIDE RAFT PER TASK CARD 26L00025011 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY POWER SUPPLY UNIT SYSTEM .