A B737-300 experienced a loss of pressurization on descent; never exceeding 10;000 feet.

Attributes
ACN	867839
Time
Date	201001
Local Time Of Day	0001-0600
Place
Locale Reference	OAK.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR PXN2
Flight Plan	IFR
Component
Aircraft Component	Pressurization System
Person 1
Function	Captain
Experience	Flight Crew Last 90 Days 287
Person 2
Function	First Officer
Experience	Flight Crew Last 90 Days 291
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

This was our second sortie in this aircraft; there were no problems on the first sortie. During descent; passing 13;000 MSL; we got the cabin altitude warning horn. We saw the cabin altitude was at 9500' and climbing at about 1000 FPM. We leveled off at 10;000' for the restriction at bored on the panoche arrival into oakland and were then given a descent to 7000' MSL for vectors to the ILS. The cabin altitude was stable at 10;000' and descended at the same rate that we were descending; 1000 fpm. The apparent depressurization was slow and the cabin masks did not deploy. We continued the approach and landed. We terminated the aircraft; discussed the event with a mechanic in oakland; and the logbook completed.

Original NASA ASRS Text

Title: A B737-300 experienced a loss of pressurization on descent; never exceeding 10;000 feet.

Narrative: This was our second sortie in this aircraft; there were no problems on the first sortie. During descent; passing 13;000 MSL; we got the cabin altitude warning horn. We saw the cabin altitude was at 9500' and climbing at about 1000 FPM. We leveled off at 10;000' for the restriction at BORED on the PANOCHE Arrival into Oakland and were then given a descent to 7000' MSL for vectors to the ILS. The cabin altitude was stable at 10;000' and descended at the same rate that we were descending; 1000 fpm. The apparent depressurization was slow and the cabin masks did not deploy. We continued the approach and landed. We terminated the aircraft; discussed the event with a Mechanic in Oakland; and the logbook completed.

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.