B737-300 suffered a loss of automatic pressurization control during climb.

Attributes
ACN	841765
Time
Date	200906
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Climb
Component
Aircraft Component	Pressurization Control System
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 11000 Flight Crew Type 9000
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 11000 Flight Crew Type 9000
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

On climb out passing FL190 the cabin altitude warning horn sounded; switching to standby regained control of the cabin altitude. At top of descent the standby cabin altitude adjustment knob would not adjust the altitude setting window. Manual mode was used for the descent into our destination.

Original NASA ASRS Text

Title: B737-300 suffered a loss of automatic pressurization control during climb.

Narrative: On climb out passing FL190 the cabin altitude warning horn sounded; switching to standby regained control of the cabin altitude. At top of descent the standby cabin altitude adjustment knob would not adjust the altitude setting window. Manual mode was used for the descent into our destination.

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.