B737-300 flight crew declared an emergency and descended due to loss of cabin pressurization.

Attributes
ACN	521927
Time
Date	200108
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zma.artcc
State Reference	FL
Altitude	msl single value : 35000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 20000 flight time type : 5000
ASRS Report	521927
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	aircraft equipment problem : critical cabin event other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : cabin pressurization ind. other flight crewa other flight crewb
Resolutory Action	aircraft : equipment problem dissipated flight crew : declared emergency other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

At FL350, dca-pbi, level. Lost control of cabin pressurization system in automatic auxiliary standby modes. As cabin climbed to a maximum of 15000 ft, passenger masks dropped. We (pilots) put on our masks, declared an emergency, started an immediate descent, followed procedures in our QRH, regained control of pressurization system in manual mode. Leveled aircraft at 10000 ft. Landed uneventfully at pbi. No injuries.

Original NASA ASRS Text

Title: B737-300 FLC DECLARED AN EMER AND DSNDED DUE TO LOSS OF CABIN PRESSURIZATION.

Narrative: AT FL350, DCA-PBI, LEVEL. LOST CTL OF CABIN PRESSURIZATION SYS IN AUTO AUX STANDBY MODES. AS CABIN CLBED TO A MAX OF 15000 FT, PAX MASKS DROPPED. WE (PLTS) PUT ON OUR MASKS, DECLARED AN EMER, STARTED AN IMMEDIATE DSCNT, FOLLOWED PROCS IN OUR QRH, REGAINED CTL OF PRESSURIZATION SYS IN MANUAL MODE. LEVELED ACFT AT 10000 FT. LANDED UNEVENTFULLY AT PBI. NO INJURIES.

Data retrieved from NASA's ASRS site as of July 2007 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.