As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 692 30-80 1877141 05MAY19 PHL CLOSE ICE CONDITION ON EICAS WITH NO ICING CONDITION, FOLLOWED BY WARNING MESSAGE A/I INOP. PERFORMED QRH PROCEDURE. HAPPENED 3 MORE TIMES THIRD TIME ON TAKE OFF. FACT 05MAY19 21:11 PHL T/S WITH FIM 30-80-00-810-801-A UP TO BLOCK17, FOUND TO BE TRANSITORY CONDITION OF ANTIICE SYSTEM. OPS CHECK ANTIICE SYSTEM IAW AMM 30-00-00 NO DEFECTS NOTED. OK FOR SERVICE.