As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#203, BOS-BDA. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS) 'DURING CLIMBOUT PASSING FL240 EICAS MSG WING ANTI ICE FAIL BOTH LEFT AND RIGHT WING ANTI ICE VALVES OPEN RAN ECL FOR LEFT SIDE WAIV CONTINUED TO FLUCTUATE BUT AFTER APPROX 5 MINUTES REMAINED CLOSED.' (SUPPLEMENTAL INFORMATION TO FOLLOW)