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 FAULT CODE (ESCAPE SLIDE LT/ EPSU (13WL) AFT L) DISPLAYED. MAINTENANCE REPLACED THE L4 DOOR SLIDE RAFT PER JOB CARD 26L00025011 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO FAULTS NOTED.