As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT, THE A/C DID NOT PRESSURIZE AND CREW HAD A FLOW LIGHT. PERFORMED VISUAL INSPECTION OF THE A/C NO DEFECTS NOTED. CHECK OPERATION OF THE OUTFLOW VLV, OPS NORM. PERFORMED BITE OF THE AUTO PRESS CONTROLLER CHECK GOOD. PRESSURIZED A/C FROM APU AND ENGINE PNEUMATICS. ELECTED TO INOP THE A/C, AUTO SHUT-DOWN SYSTEM AS A PRECAUTION.