As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALT CAUTION MESSAGE AT FL 340. FOLLOWED QRH. UNABLE TO CONTROL CABIN PRESSURE, DIVERTED EMERGENCY DECLARED. INTEGRATED MDC. SAFETY VALVE 2 POSTED. R & R NR 2 SAFETY VALVE & OPS CHECKED GOOD IAW AMM 21-32-03, REF AIPC 21-32-03, ITEM 5.