As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MSP - FLT 701 - DURING CRUISE FLIGHT, FELT NOSE AND VIBRATION. CABIN PRESSURE BEGAN TO RISE. SWITCHED TO STANDBY PRESSURE AND BEGAN DESCENT. CABIN PRESSURE STABILIZED AT FL 180. FOUND FORWARD CARGO DOOR SEAL TORN. REPLACED FORWARD CARGO DOOR SEAL PER MM 52-09-121. PRESSURIZED A/C TO 6.5 PSI FOR 15 MINUTES, NO DEFECTS FOUND. (X)