As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN A-CHECK IAW WC 2803, FOUND THE EMERGENCY LIGHT AT THE L4 DOOR INOPERATIVE. THE AIRCRAFT WAS GROUNDED. PERFORMED FIM 33-50-F1-M8A-421A, AND FOUND THE CONTROL UNIT AT THE L4 DOOR DEFECTIVE. REPLACED THE CONTROL UNIT IAW AMM 33-51-07. OPS CHECKED OK. OK FOR SERVICE.