As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
'PACK 1' EICAS STATUS MESSAGE DISPLAYED. NEITHER PTC IN CONTROL OF PACK 1 OR PACK COMPONENT FAILURE OR OVERHEAT OR PACK TRIP DUE TO OVERHEAT OR OUT OF SEQUENCE. THE NR 1 PACK FCV IS SECURED CLOSED. PACK IS INOP EICAS MSG: TURB BYPASS VALVE -1 WIRING FAIL MSG:21118A. RAN PACK SEVERAL TIMES FOR PROLONG PERIODS AND RAN CMC CHKS. PACK RAN NORMAL WITH NO FAULTS ON STATUS OR THRU CMC.