<< >> NASA ASRS Report 1057182, December 2012

When they received a cabin altitude warning climbing through FL320 the flight crew of a B737-500 declared an emergency; descended to a safe altitude and diverted to a nearby airport.

Attributes
ACN	1057182
Time
Date	201212
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pressurization System
Person 1
Function	First Officer
Experience	Flight Crew Last 90 Days 165
Person 2
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 231 Flight Crew Type 7200
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Fuel Issue

Narrative:

Climbing through approximately 32;000 ft; the cabin altitude warning horn sounded. The cabin altitude was approximately 10;000 ft and climbing. We first complied with the memory items. After putting on our oxygen masks and establishing communications; we asked for and received clearance to descend to 14;000 ft and then 10;000 ft. We then reviewed the QRH and completed the cabin altitude warning horn/abnormal pressurization checklist and emergency descent checklist.while descending; we completed the items on the checklists and saw that the pressurization was controllable and the cabin altitude had stabilized below 10;000 ft. We elected to continue our descent since we didn't know what had caused the cabin altitude to exceed 10;000 ft. There had been no abnormal indications or warning lights. We contacted dispatch; discussed our fuel and status; and agreed to divert to a nearby airport and landed there safely.

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Original NASA ASRS Text

Title: When they received a cabin altitude warning climbing through FL320 the flight crew of a B737-500 declared an emergency; descended to a safe altitude and diverted to a nearby airport.

Narrative: Climbing through approximately 32;000 FT; the Cabin Altitude Warning horn sounded. The cabin altitude was approximately 10;000 FT and climbing. We first complied with the memory items. After putting on our oxygen masks and establishing communications; we asked for and received clearance to descend to 14;000 FT and then 10;000 FT. We then reviewed the QRH and completed the Cabin Altitude Warning Horn/Abnormal Pressurization Checklist and Emergency Descent Checklist.While descending; we completed the items on the checklists and saw that the pressurization was controllable and the cabin altitude had stabilized below 10;000 FT. We elected to continue our descent since we didn't know what had caused the cabin altitude to exceed 10;000 FT. There had been no abnormal indications or warning lights. We contacted Dispatch; discussed our fuel and status; and agreed to divert to a nearby airport and landed there safely.

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.