As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT RT CENTER OVERWING SLIDE WOULD NOT ILLUMINATE. ACCOMPLISHED WIRING CHK IAW AWM 33-50-50. WIRES FROM BATTERY PACK NR 4 CONNECTOR (P1895) PIN "H" TO LIGHT CONNECTOR (P3321) PINS A/B CHECK GOOD. FOUND BATTERY PACK NR 4 AT FAULT, REMOVED AND REPLACED PACK NR 4 IAW 33-50-01, ALL OPS CHK NORMAL.