What was found
DURING CLIMB, CREW COULD NOT PRESSURIZE AIRCRAFT. AIRCRAFT RETURNED TO YOW. MAINTENANCE DEFERRED BOTH AUTO CABIN PRESSURE CONTROLLERS 21-31-1 CODE C.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CLIMB, CREW COULD NOT PRESSURIZE AIRCRAFT. AIRCRAFT RETURNED TO YOW. MAINTENANCE DEFERRED BOTH AUTO CABIN PRESSURE CONTROLLERS 21-31-1 CODE C.