As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD EQUIPMENT VALVE EICAS MESSAGE AFTER ENGINE START. WON`T CLEAR AFTER QRH PROCEDURE. PERFORMED ENGINE RUN, IAW AMM 71-00-00 WITH EQUIPMENT COOL SELECT SWITCH IN STANDBY FWD EQUIPMENT VALVE MESSAGE EXTINGUISHED. TRANSFERRED TO DMI 135450, IAW MEL 21-58-01-01 CAT C DUE 13OCT20. PLACARDS INSTALLED. REMOVED AND REPLACED FWD INTERCONNECT VALVE, IAW AMM 21-58-01. OPS TEST OK. THIS CLEARS MDDR 135450.