As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AHM DETECTED WELS MMSG {33-12102} CLASS 02 - DOOR 1 RT REMOTE WELS CONTROL UNIT CONFIGURATION DOES NOT AGREE WITH OTHER WIRELESS EMERG LIGHTING SYS CONTROL UNITS* REF FIM DMC-B787-A-33-50-F1-M3A-421A-A TO CONFIRM FAULT. CON'T FAULT ISOLATION AS REQ'D. REF CONFIG DRAWING 2500DD15922 TO AID LOCATING WCU M3351002 AT DOOR 1R. CARRIED BY ELB FOUND CLASS 02 DR-1R WELS CONTROLLER INACTIVE, REPLACED BATTERY, OPS CHECK GOOD REF AMM DMC-B787-A-33-51-07-09A-921A-A.