As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST NR 1 AND 2 PRESSURIZATION CONTROLLER. WENT TO MANUAL, CABIN CLIMBED TO 1,500 FEET CABIN ALTITUDE. THEN MANUAL OUTFLOW FULL CLOSED. CABIN QUICKLY BEGAN TO PRESSURIZE TO BELOW CABIN ALTITUDE. FOUND BOTH A/C MOTOR FAULT LIGHT ILLUMINATED ON BOTH CONTROLLERS. NOTED INSULATION CLIP INTERFERING WITH CONTROL VALVE MOVEMENT. REPOSITIONED CLIP AND INSULATION.