What was found
AHM DETECTED WELS MMSG {33-12131} *CLASS 31 - REMOTE WELS CONTROL UNIT CONFIGURATION DOES NOT AGREE WITH OTHER WIRELESS EMERG LIGHTING SYS CONTROL UNITS. * REF FIM DMC-B787-A-33-50-F1-P3A-421A-A TO ISOLATE FAULT. REF CONFIG DWG 2500DD15996 TO AID LOCATING WCU CLASS 31.1 M3351033 INSIDE OFAR, AT BUNK #1 BEHIND ACCESS PANEL FWD SIDE OF BUNK. CARRIED BY ELB IF THE WCU NEEDS TO BE REPLACED & S/W UPLOADED, REF ECRA 3351-01521 WHICH APPROVES THE AMM EFFECTIVITY TO INCLUDE THIS TAIL #. PERFORMED OPS CHECKS IAW MM 33-51-00. ALL TESTS PASS AND COULD NOT DUPLICATE ANY FAULTS. NO FAULTS NOTED. ITEM CLEARED.