As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. AIRPLANE HEALTH MONITORING ALERTS RECEIVED FOR THE WIRELESS EMERGENCY LIGHTING SYSTEM. REMOVED AND REPLACED WELS CONTROL UNIT ABOVE L1 DOOR AND WELS CONTROL UNIT ABOVE L4 DOOR (AALA201705039008) IAW DMC-B787-A-33-51-07-01A. OPERATIONAL CHECK GOOD.