As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT NOTICED EMER LIGHT STRIP ON FLOOR STAYED ON WITH SWITCH IN ARM MODE. EMER LIGHTS THAT WERE ON WERE FROM ROW 14 TO 18 ON THE A SIDE OF SEATS. R & R NR 4 EPSU ASSEMBLY. OPERATIONS CHECKED GOOD IAW WC 33-700-19. CHARGER ASSEMBLY BATTERY PN BA5-0933-901 & SN C00652.