As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EQUIPMENT COOLING ADVISORY MSG AS PER MT 21-004 R3, CLEANED SUPPLY FAN INLET AIR FILTER AND CLEANED FD PRESSURE TRANSDUCER PLUG. EQUIPMENT COOLING GROUND TEST PASSED WITH NO STATUS OR ADVISORY MESSAGE. IDENTIFIED THE PROBLEM RMVG THE CONNECTOR FROM FD PRESSURE TRANSDUCER. BOTH LOW FLOW SENSORS CHECKED & ARE GOOD. REMOVED DM21587 FD PRESSURE TRANSDUCER CONNECTOR AND STOWED AS PER STANDARD PRACTICES. REPLACED FD EQUIPMENT COOLING DUCT PRESSURE SENSOR PER MM AND OPS OKAY.