What was found
UNABLE TO PRESSURIZE A/C AFTER TAKEOFF. A/C RETURNED LAX. REPLACED OUTFLOW VALVE, OPS CHECK NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UNABLE TO PRESSURIZE A/C AFTER TAKEOFF. A/C RETURNED LAX. REPLACED OUTFLOW VALVE, OPS CHECK NORMAL.