As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1137, BOS-DTW. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS) 'ANTIICE ENGINE AND WING FAIL; PER CREW BOTH "A-1 ENG 1 FAIL" AND "A-1 ENG 2 FAIL " SHOWED SIMULTANEOSLY ON EICAS DURING TAKE OFF SPURIOS CONDITION NO MX ACTION IS REQ 'D REF FIM 30-20-00-810-807-A. PERFORMED TEST FOR R/H WING -A-1-FAIL IAW FIM 30-11-00-810-809-A. MSG CLEARED TRANSITORY CONDITION .'