As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERMITTENT DISPLAY ON FMC (3 TIMES IN DESCENT) TAI ON ABOVE 10DEG, TAI WAS NOT ON. NO INDICATION OF IT BEING ON - ENGINE IDLE LOW. ACFT GROUNDED. IAW FIM 34-61 TASK 801, PERFORMED FMC DISCRETE SWITCH TEST, VERIFIED BOTH ENGINE ANTI-ICE SWITCHES DISCRETES OPS NORMAL. CREW REPORTED ANTI-ICE VALVES OPERATED NORMAL NO FAULTS.