As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER CLIMB OUT ACFT WAS NOT PRESSURIZING. WE CLIMBED UP TO 10000 FT & RETURNED. R & R AUTO DIGITAL CONTROL IAW AMM 21-21-01. OPERATIONS CHECKED GOOD. PERFORMED FUNCTIONAL AUTO PRESSURIZATION TEST IAW AMM 21-31-00. OPERATIONS CHECKED GOOD.