As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK FCV R ONE (BUT NOT BOTH) OF THE TWO RIGHT PACK FLOW CONTROL VALVES (FCV) ARE NOT IN THE COMMANDED POSITION. STATUS PERFORMED MAT TEST TEST FAILED, DEACTIVATED RT PACK UPPER FCV AS PER MEL2151C. REPLACED VALVE. OPS CKS GOOD. NO MESSAGES.