As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ADVANCING POWER LEVERS FOR TAKEOFF, PRESSURIZATION SYSTEM WENT TO FULL SCALE (>2000 FPM) DOWN. ABORTED TAKEOFF AND SYSTEM WENT FULL SCALE UP. CHECKED ALL SWITCHES AND CONFIRMED SYSTEM WAS IN AUTO MODE. INSTALLED ELECTRONIC ALTITUDE CONTROLLER. OPS CHECK AUTO AND MANUAL PRESSURIZATION GOOD WITH BREAKOUT BOX.