As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF WITH THE CONTROLLER IN MANUAL, THE PRESSURIZATION SYSTEM SHOWED A CLIMB RATE OF 2000 FPM WITH A PRESSURE DIFFERENTIAL OF 0. WE FOLLOWED WITH A CLIMB TO 9,500 AND TRIED DIFFERENT MANUAL ADJUSTMENTS BUT WE WERE NOT ABLE TO PRESSURIZE THE CABIN. REPLACED BOTH AUTO CONTROLLERS AND ELECTROPNEUMATIC OUTFLOW VALVE AND PRESSURIZED AIRCRAFT. OPS CHECK GOOD.