A B737-300 in climb at 13500 ft declared an emergency and diverted due to inability to control cabin pressurization in any mode.

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Attributes
ACN	403957
Time
Date	199806
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : phl
State Reference	PA
Altitude	msl bound lower : 13500 msl bound upper : 13500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90 tower : ewr
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 240 flight time total : 13800 flight time type : 3000
ASRS Report	403957
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Dispatched with 1 outflow valve inoperative, 1 pack inoperative. On takeoff during initial climb, had difficulty with automatic pressurization controller. It failed, reverted to standby. Standby failed. Went to manual control, unable to control cabin effectively. Cabin altitude horn went off. Declared emergency, landed at phl.

Original NASA ASRS Text

Title: A B737-300 IN CLB AT 13500 FT DECLARED AN EMER AND DIVERTED DUE TO INABILITY TO CTL CABIN PRESSURIZATION IN ANY MODE.

Narrative: DISPATCHED WITH 1 OUTFLOW VALVE INOP, 1 PACK INOP. ON TKOF DURING INITIAL CLB, HAD DIFFICULTY WITH AUTO PRESSURIZATION CTLR. IT FAILED, REVERTED TO STANDBY. STANDBY FAILED. WENT TO MANUAL CTL, UNABLE TO CTL CABIN EFFECTIVELY. CABIN ALT HORN WENT OFF. DECLARED EMER, LANDED AT PHL.

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.