An MD80 in cruise at FL280 declared an emergency and diverted due to loss of cabin pressure.

Attributes
ACN	403014
Time
Date	199805
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : mkc
State Reference	MO
Altitude	msl bound lower : 28000 msl bound upper : 28000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : mkc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other other other
Route In Use	enroute airway : mkc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 19600 flight time type : 2500
ASRS Report	403014
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:

At FL280, cabin climbed above 10000 ft out of control. Using standby system, regained control while descending after declaring emergency and received descent clearance from ATC. Landed mke with no other problem. No overweight landing.

Original NASA ASRS Text

Title: AN MD80 IN CRUISE AT FL280 DECLARED AN EMER AND DIVERTED DUE TO LOSS OF CABIN PRESSURE.

Narrative: AT FL280, CABIN CLBED ABOVE 10000 FT OUT OF CTL. USING STANDBY SYS, REGAINED CTL WHILE DSNDING AFTER DECLARING EMER AND RECEIVED DSCNT CLRNC FROM ATC. LANDED MKE WITH NO OTHER PROB. NO OVERWT LNDG.

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.