As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOLLOWING ENGINE START, TARGET IN VALUES DIFFER, THE FIX IS CYCLING ANTI-ICE. ACFT GROUNDED. R & R TAI VALVE ON NR 2 ENGINE IAW MM 30-21-11-000-801 & 30-21-11-400-801, OPS CHECKED GOOD IAW MM 30-21-00-710-801. ACCOMP FMC ANTI ICE DISCRETS SYS TEST IAW MM 34-61-00-730-003 STEP 4.