What was found
UNABLE TO CONTROL CABIN ALTITUDE. (FLT 6551) REPLACED LEFT PACK PRSOV AND RIGHT PACK DUAL BYPASS VALVE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UNABLE TO CONTROL CABIN ALTITUDE. (FLT 6551) REPLACED LEFT PACK PRSOV AND RIGHT PACK DUAL BYPASS VALVE.