As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 2 ENGINE BLEED TRIPPED AT 39,000 FT. THE CABIN CLIMBED TO ABOVE 10,000 FT WITH AN INTERMITTENT CABIN ALTITUDE WARNING HORN SOUNDING. CREW EXECUTED AN EMERGENCY DESCENT, COMPLIED WITH QRH PROCEDURES, AND CONTINUED TO DESTINATION. MX REPLACED THE NR2 ENGINE PRSOV AND FUNCTIONALLY CHECKED THE SYS.