As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRESSURIZATION INOP ON CLIMBOUT CABIN RATE HAD NO CONTROL OF RATE OF CLIMB. AT ALTITUDE CONTROLLER HAD NO EFFECT ON CABIN ALT. ON DESCENT PRESSURIZATION FAILED (CABIN ALT) LIGHT CAME ON O2 MASKS WERE DONNED EMERGENCY DECLARED UNTIL REACHING A SAFE ALT. REMOVED LT MLG SQUAT SWITCH DUE TO ERRATIC READINGS INSTALLED NEW SWITCH AND RIGGED. OPS CHECK GOOD. PRESSURIZATION CHECK GOOD. IAW C560 MM 32-61-00