What was found
FLIGHT DIVERTED TO BUF WITH A LOSS OF CABIN PRESSURIZE. AT FL330, CABIN WAS CLIMBING 2KFT/MIN AND THE OUTFLOW VALVE SEEMED UN-RESPONSIVE. CREW COMPLIED WITH QRH PROCEDURES, DONNED MASK AND COMMENCED AN EMERGENCY DESCENT. CABIN ALTITUDE REACHED 14K BUT MASKS DID NOT DEPLOY. THE OUTFLOW VALVE WAS MANUALLY RECOVERED AT FL100. BUF MAINTENANCE MELD THE CABIN AIR OUTFLOW VALVE PER 21-00-25 AND FERRIED AIRCRAFT TO DTW. THE OUTFLOW VALVE WAS REPLACED AND 2 RELAYS WERE RESEATED.