As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRINGING THE THRUST LEVERS UP TO 75-80% HEARD A NOISE; LOOKED AT THE PRESSURIZATION CONTROL AND SAW THAT WE WERE LOSING PRESSURE, WITH THE CABIN CLIMBING (AT THAT TIME) AT 3600' PER MINUTE. IMMEDIATELY INITIATED AN EMERGENCY DESCENT. INSPECTED DOOR SEAL, NO DAMAGE NOTICED, PURGED DOOR SEAL. NO DEFECTS NOTED ON PRESSURIZATION SYSTEM.