As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRESSURIZATION INOP DURING CLIMB, SWITCHED TO MANUALLY CONTROLLED PRESSURIZATION AT CRUISE ABOUT 10 MINUTES. CABIN WENT TO FULL CLIMB BUT COULD NOT BE CONTROLLED MANUALLY. INITIATED EMERGENCY DESCENT, HAD NORMAL PACK PRESSURE. DEFERRED PER MEL 21-25 T FUNCTION COMPLIED WITH PLACARD INSTALLED BREAKERS PULLED AND COLLARED. OUTFLOW VALVE SECURED OPEN.