As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WILL NOT PRESSURIZE DURING FLIGHT. AUTO & MANUAL PRESSURIZATION C/W MAINT AND FLIGHT CREW PROCEDURES. DUMP BUTTON SELECTED. PERFORMED OPERATIONAL CHECK OF BOTH MANUAL & AUTO PRESSURIZATION CONTROL SYSTEMS IAW AMM 21-31-00. OPS CHECK GOOD. DETERMINED TO BE TRANSITORY CONDITION.