As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT FROM PKWA TO PHIK PASSING THROUGH FL 330 WITH PRESSURIZATION IN MANUAL MODE CABIN ALT CLIMBED RAPIDLY. UNABLE TO MAINTAIN CABIN WITH MANUAL CONTROL VALVE OR AUTO PRESS. AIRCRAFT RETURNED TO PKWA WITHOUT INCIDENT. MAINTENANCE FOUND OUTFLOW VALVE LINKAGE TO DRIVE SECTION DRY AND REQUIRING LUBE DMI'D AUTO PRESSURIZATION AND MANUAL OPERATION CHECKED OK AFTER LUBE. AIRCRAFT WAS RETURNED TO SERVICE.