As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE RUNNING EPSU TEST BEFORE SLIDE REPLACEMENT, RECEIVED AN ESCAPE SLIDE LIGHT, EPSU 11WL DOOR 1 FAULT. RED EXTERIOR LED ALSO CAME ON DURING TEST OF EPSU. REMOVED & REPLACED THE L1 DOOR SLIDE IAW AMDS 2561-9403. SAFETY PINS REMOVED AND STOWED. DOOR ARMED. TROUBLESHOT IAW TSM 25-62-00-810-825-A. OPS CHECKED GOOD. FAULTS DISAPPEARED. OK FOR SERVICE.