As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB FROM YQX, CABIN ALT. WAS ANNUNCIATED WITH MASTER WARNING. FLOW LITEWAS ON PRESSURE CONTROLLER. EMERGENCY DESXENT INITIATED AND LANDED BACK TO YQX. AFT GALLEY DOOR ANNUNCIATED BRIEFLY DURING DESCENT. AFT SERVICE DOOR SEAL AND LATCHES CHECKED, DOOR CYCLED, AIRCRAFT PRESSURIZED ON GROUND AND NO LEAK NOTED, ANNUNCIATOR LIGHT OUT. AIRCRAFT RELEASED FOR FLIGHT.