What was found
DURING CLIMB, CABIN HI ALT WARNING CAME ON AND MASTER WARNING CHIMED. AIRCRAFT RETURNED TO MSP. MAINTENANCE REPLACED PRESSURE CONTROLLER, ALL CHECKS GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING CLIMB, CABIN HI ALT WARNING CAME ON AND MASTER WARNING CHIMED. AIRCRAFT RETURNED TO MSP. MAINTENANCE REPLACED PRESSURE CONTROLLER, ALL CHECKS GOOD.