As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RTB DUE EQUIPMENT COOLING OVERBOARD VALVE LIGHT ILLUMINATED DID NO GO OUT IN STANDBY. NO DISPATCH ALLOWED BY FCP. LOCKED VALVE CLOSED AND RELEASED PER MEL. RE-ACTIVATED SYSTEM AND PUT BACK IN AUTO SYSTEM, OPS NML. NO HISTORY. MCO AND PLAC REM.