As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE AIRCRAFT LOST CABIN PRESSURE AND REQUESTED EMERGENCY DECENT, AFTER DECENT THE CREW NOTED THAT THE DUMP VALVE WAS IN DUMP POSTION, RESET SWITCH TO NORMAL POSTION AND CABIN BEGAN PRESSURIZE. NO MAINTENANCE REQUIRED.(CLOSED)