As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE CABIN WAS NOT PRESSURIZING AND THE RATE OF CLIMB INDICATOR WAS MIRRORING THE AIRCRAFTS VERTICAL SPEED. WE TRIED MANUAL PRESS AND THE CHERRY PICKER WITH NO SUCCESS. MASKS DID NOT DEPLOY WE NEVER EXCEEDED 6000' AND WE WERE UNDER MAX LANDING WEIGHT FOR LANDING. REMOVED DEFECTIVE PRIMARY OUTFLOW VALVE AND INSTALLED A CUSTOMER SUPPLIED INSPECTED PRIMARY OUTFLOW VALVE REF AMM 21-30-00