As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXPERIENCED RAPID DEPRESSURIZATION AT 15000 FEET. UNABLE TO CONTROL PRESSURIZATION IN EITHER NORMAL OR AUTO MODES. RAN NR 2 ENGINE. CHECKED CABIN AND CARGO DOOR SEALS. REPOSITIONED AIR TUBE FOR CABIN DOOR. CLEANED SQUAT SWITCH ON LANDING. OPS CHECKS GOOD.