As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECKED, EPSU (13WL) AFT L/DEU-B (300RH7) FAULT DURING EPSU TEST. ACFT WAS NOT GROUNDED. FOUND ELECTRICAL HARNESS ON R4 DOOR ESCAPE SLIDE UNPLUGGED. PLUGGED HARNESS BACK IN IAW AMM 25-62-44-400-803-A. NO FURTHER DEFECTS NOTED". AIRCRAFT WAS RETURNED TO SERVICE. /END/