What was found
AFTER TAKEOFF, CREW WAS UNABLE TO PRESSURE AIRCRAFT, RETURNED TO PHX AND MADE AN UNEVENTFUL LANDING. REPLACED PRESSURE CONTROLLER AND OP CHECKED SYSTEM PER BOEING M/M.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER TAKEOFF, CREW WAS UNABLE TO PRESSURE AIRCRAFT, RETURNED TO PHX AND MADE AN UNEVENTFUL LANDING. REPLACED PRESSURE CONTROLLER AND OP CHECKED SYSTEM PER BOEING M/M.