As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT EXPERIENCED BLEED TRIP RESULTING IN CABIN ALTITUDE RISING ABOVE 10,000 FEET. AIRCRAFT WAS IN CRUISE AT 31,000 FEET. CAPTAIN DECLARED AN EMERGENCY FOR IMMEDIATE DESCENT. DESCENDED TO 20,000 FEET AND PRESSURE RETURNED TO NORMAL. CONTINUED TO DESCEND INTO LGA. *S/D* REPLACED NR 3 ENGINE PNEUMATIC BLEED AIR VALVE.