As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT ACFT ALTITUDE 11000 CABIN ALTITUDE CLIMBED TO ABOVE 8500 FT & AMBER CAUTION APPEARED. CABIN CONTINUED TO CLIMB TO SLIGHTLY ABOVE 10000 FT &THE CAUTION CHANGED TO A WARNING. DECLARED EMERGENCY & LANDED PHL, SCHEDULED STN. NOTICED OTBD EXHAUST SOV WAS IN THE OPEN POSITION. CLOSED VLV HANDLE INTO POSITION CLOSED TO COMPLIED WITH MEL IAW AWAC SUPP 13-014.