As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6194 - IAD-EVR - MADE AN SCHEDULED LANDING AT EVR WITH ONE DISCREPANCY WHICH WAS UNABLE TO CONTROL FLOWS. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE OPENED DMI 55980, MEL 21-14. MAINTENANCE CLOSED DMI 55980 BY CLEANING AND RESECURING LINES TO OUTFLOW VALVE, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)