B737-300 flight crew reported loss of cabin pressure in cruise flight at FL350. They declared an eme...

Attributes
ACN	1123345
Time
Date	201310
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Component
Aircraft Component	Pressurization Control System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

We leveled off at our final cruising altitude of FL350. All systems were set up in their normal configurations. About ten minutes into cruise flight the cabin altitude warning horn went off. We immediately started memory items for the situation. By the time I had my O2 mask on and checked the cabin altimeter; we realized the cabin had already gone up to 14;000 - 15;000 ft. We contacted ATC; declared an emergency; and asked for an immediate descent and continued with the qrc/QRH procedures. During the descent with the outflow valve fully closed; the aircraft still lost pressure. We notified the flight attendants about the issue and made an announcement to the passengers. When we leveled off at a safe altitude; I decided to continue on to [destination] because we were fairly close and had enough fuel at that time to make it there. We landed without further incident.

Original NASA ASRS Text

Title: B737-300 flight crew reported loss of cabin pressure in cruise flight at FL350. They declared an emergency; executed an emergency descent; and continued to their nearby destination.

Narrative: We leveled off at our final cruising altitude of FL350. All systems were set up in their normal configurations. About ten minutes into cruise flight the cabin altitude warning horn went off. We immediately started memory items for the situation. By the time I had my O2 mask on and checked the cabin altimeter; we realized the cabin had already gone up to 14;000 - 15;000 FT. We contacted ATC; declared an emergency; and asked for an immediate descent and continued with the QRC/QRH procedures. During the descent with the outflow valve fully closed; the aircraft still lost pressure. We notified the flight attendants about the issue and made an announcement to the passengers. When we leveled off at a safe altitude; I decided to continue on to [destination] because we were fairly close and had enough fuel at that time to make it there. We landed without further incident.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.