Narrative:

At FL370 given clearance to cross an arrival fix at FL250 and 300 KTS on the descent into our destination. Shortly after the aircraft began the descent all auto and manual pressure control systems indicated a failure. The cabin began climbing. The flight deck crew donned oxygen; declared an emergency with the center and requested descent to 10;000 MSL. On the descent the cabin altitude climbed above 14;500 MSL. We were given clearance direct to an arrival intersection at 8;000 MSL. We continued unpressurized to a landing. There were no injuries reported. Customer service personnel met the aircraft upon arrival. There was no jetway operator at the gate so operations were notified and we were delayed in deplaning. One auto pressure control channel was inoperative and on MEL. There were no indications of anything other then normal until additional failures accrued. Cabin was at 8;000 MSL and the pressure differential was 8.3 psi at FL370. It did seem that once the thrust was reduced for the descent; the failures occurred. After inspection of the cabin I noticed that several oxygen masks were deployed; but not used by the passengers. This flight was an initial operation flight for the first office in training; I appreciated his high level of performance as he definitely met and exceeded the standard.

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Original NASA ASRS Text

Title: An ERJ190 with one Auto Pressurization Control channel MEL'ed; had both the second Auto and Manual pressurization controls fail as the descent from FL370 was begun. An emergency was declared; a descent begun and cabin passenger masks dropped descending through 18;000.

Narrative: At FL370 given clearance to cross an arrival fix at FL250 and 300 KTS on the descent into our destination. Shortly after the aircraft began the descent all auto and manual pressure control systems indicated a failure. The cabin began climbing. The flight deck crew donned oxygen; declared an emergency with the Center and requested descent to 10;000 MSL. On the descent the cabin altitude climbed above 14;500 MSL. We were given clearance direct to an arrival intersection at 8;000 MSL. We continued unpressurized to a landing. There were no injuries reported. Customer Service personnel met the aircraft upon arrival. There was no jetway operator at the gate so operations were notified and we were delayed in deplaning. One auto pressure control channel was inoperative and on MEL. There were no indications of anything other then normal until additional failures accrued. Cabin was at 8;000 MSL and the pressure differential was 8.3 PSI at FL370. It did seem that once the thrust was reduced for the descent; the failures occurred. After inspection of the cabin I noticed that several oxygen masks were deployed; but not used by the passengers. This flight was an initial operation flight for the First Office in training; I appreciated his high level of performance as he definitely met and exceeded the standard.

Data retrieved from NASA's ASRS site as of April 2012 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.