As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LIGHTS INOP IN NR 4 FIRE HANDLE DURING FIRE TEST IN BOTH.. HOWEVER, LIGHTS WILL TEST INDEPENDENTLY IN EITHER A OR B. T/S SYSTEM USING WDM 26-11-41 AND MM 26-11-00. REPLACED K13 RELAY ON FIRE DETECTION MODULE. SYSTEM OPS CHECKS OK PER MM 26-11-00.