As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK FCV L STATUS MSG RESET MESSAGE CLEARED THEN REAPPEARED. LT UPPER FCV INOPERATIVE. DEACTIVATED UPR FCV IN CLOSED POSITION PER MEL. REPLACED UPPER FCSOV ON LH PACK. OPS CHECK OKAY. REOPENED BY OPBLM ON 30JAN10 FOR FCV MSG HIT BEFORE ACFT DEPARTED IAD. SUSPECT UPPER FCV IS FAULTING. REPLACED LT FLOW CONTROL VALVE. RESTORED AIRCRAFT TO NORMAL, LEAK CHK VERIFIED NO EICAS MSGS.