B737-700
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 114
Aircraft Equipment Problem Critical
Air Traffic Control Issued New Clearance; General Declared Emergency; General Maintenance Action
Aircraft
On descent; as we leveled off at an intermediate altitude of FL340 the Cabin Warning horn and lights activated. We immediately did our memory items and followed the steps of the QRH. At this point; I noted that the cabin altitude was at 10;500 FT. At my request the First Officer requested an emergency descent and ATC cleared us to 10;000 FT. As we descended through FL190 I noticed that the cabin altitude had begun to descend. As we reached 12;000 FT the cabin altitude continued to descend below 10;000 FT. We let ATC know that cabin pressure was under control and we continued to and had a normal landing at our destination. During the descent; I spoke with the flight attendants to see if they had noticed any cabin pressure changes. They reported that no one had noticed or reported any discomfort.
We declared an emergency with Center and initiated an immediate descent to FL100.After reaching 10;000 FT we canceled the emergency with Center and proceeded as normal... ...Contract Maintenance personnel said there were problems with one or both pressurization controllers.
The flight crew of a B737-700 resonded appropriately to a cabin altitude warning while level at FL340.