As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2783, BOS-RDU. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS) 'A-I WING FAIL MULTIPLE OCCASIONS. COMPLIED WITH QRH. MESSAGE PERSIST; REMOVED AND REPLACED LH WING ANTI-ICE VALVE AND WING LH A-I PRESSURE SENSOR IAW AMM 30-11-01 AND AMM 30-11-03. RESPECTEVELY. OPS CHECK OK. OK TO CONTINUE.'