What was found
WING ANTI-ICE SYS WIPS HAD SINGLE OR MULTIPLE INTERNAL/EXTERNAL FAILURES AFFEC TING 1 OR MORE AC SUPPLIES OR BOTH DC SUPPLIES (BUT WIPCU STILL OPERATIVE) OR ONE AC SUPPLY OR MORE THAN 1 SEQUENCER CHANNEL FAILED OR MORE THAN 1 CAN BUSS FAILED OR 2 FAILED TEMP SENS DB WIPCU SEQUENCE CONTROLLER CARD CHANNEL 1 DB WIPCU SEQUENCE CONTROLLER CARD CHANNEL 3 DB WIPCU SEQUENCE CONTROLLER CARD CHANNEL 2, CREW STATED WING ANTI ICE SYS STATUS MESSAGE APPEARED DURING FLT. IAW MEL EICAS MESSAGE(S):FOLLOWING MAY BE DISPLAYED: (STATUS) WING ANTI-ICE ZONE", CREW ALSO STATED THEY VIEWED MAINT PGS & SAW ZONES 3E - 10E FAULTED, NO OTHER ZONES (SAME AS MEL) FAULT CODES 30-20068 (SAME AS MEL). WIPS CONTROLLER & HEATER ASSY TEST ALSO SHOWS ONLY FAULT AS 30-20068. PERFORMED FIM ISOLATION PROCED WIRING CHK CONTINUITY TO GROUND FOR PIN C & PIN J TO GROUND ON BOTH MAT 3-EF B3011004 & MAT 10-EF B3011019. WIRING CHK OKAY. R & R WIPS ZONE CONTROL CARD 8. SW CONFIRMED. CMCF GROUND TEST: 30 WING ICE PROTECTION SYS, SYS TEST, WIPS CONTROLLER & HEATER ASSEMBLY. GROUND TEST PASSED NO FAULTS NOTED. REF FIM DMC-B787-A-30-10-F1-12A-421A-A & WDM DMC-B787-30-11-12-08A-051A-D.