As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1873, EWR-LAX. 'FIN 13WL EPU FAILS TEST; REF FAULT FDEEPMS BY EPSU 13WL ACCOMPLISHED TSM 33-51-00-810-842A HAD MESSAGE ESCAPE SLIDE LEFT FOLLOWED TSM 25-62-00-810-819 FOUND CONNECTOR BETWEEN 13WL AND AFTL SLIDE DIRTY CLEARED PLUG AND OPS CHECK EPSU 13WL WITH NO FAULT BITE TEST PASSED. A/C OK FOR SVC.'