As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EEL LIGHTS IN BUSINESS CLASS AND OVERWING EXIT LIGHTS FLASH CONTINUOUSLY WITH SWITCH IN ARMED. *S/D* REPLACED BATTERY PACK AT M737 FOR TROUBLESHOOTING, NO HELP. SWAPPED BATTERY PACK AT M735 WITH M737, PROBLEM FOLLOWED. REPLACED BATTERY PACK M735.