As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE AIRCRAFT WHILE CLIMBING THROUGH 3000 TO 4000 FT AGL. AUTO 1 AND AUTO 2 FAIL LIGHTS CAME ON AND UNABLE TO CLOSE OUTFLOW VALVE MANUALLY WITH CONTROL WHEEL PAST THE 20 DEG MARK ON THE FLAP SCALE. FOUND SCREW JAMMING CONTROL WHEEL IN PEDESTAL. REMOVED SCREW.