As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, CABIN PRESSURE CLIMBED RAPIDLY. SWITCHED TO MANUAL PRESSURE MODE ACFT STILL DIDN`T PRESSURIZE. DECLARED EMERGENCY AND LANDED WITHOUT EVENT. FOUND DIGITAL PRESSURE CONTROLLER TO READ ERRATICALLY AND MANUAL BUTTON WOULD NOT STAY DEPRESSED. R & R DIGITAL PRESSURE CONTROLLER IAW AMM 21-31-01, OPC GOOD IN MANUAL AND AUTO IAW AMM 21-31-00-700-801-A AND 21-31-00-700-802-A.