As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION / DECLARED EMERGENCY. CABIN ALTITUDE WARNING HORN SOUNDED AT 370FLT IN CRUISE FLIGHT. CABIN WAS AT 10,000 FT. UNABLE TO RESTORE CABIN ALTITUDE. MAX CABIN ALTITUDE WAS 12,000 FT. EMERGENCY DESCENT WITH MANUAL CONTROL. REMOVED AND REPLACED NR 1 & NR 2 CABIN PRESSURE CONTROLLER PER MM.