An MD80 in cruise at FL280 declared an emergency and descended to 10000 ft due to loss of cabin pressure caused by a failed cabin pressure controller.

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Attributes
ACN	547041
Time
Date	200205
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zdc.artcc
State Reference	VA
Altitude	msl single value : 28000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
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 : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 160 flight time total : 12000 flight time type : 1100
ASRS Report	547041
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 19000 flight time type : 2000
ASRS Report	547040
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : cabin pressure indicator other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : declared emergency
Consequence	other other
Supplementary
Problem Areas	Aircraft Weather
Primary Problem	Aircraft

Narrative:

Cruising at FL280, selected engine anti-ice on, cabin started climbing in excess of 1500 FPM. Turned off eai, cabin continued to climb. Accomplished 'loss of pressurization' checklist, declared an emergency, squawked 7700, and performed emergency descent to 10000 ft. Cabin altitude reached 10500 ft, masks did not drop and no passenger reported any discomfort or injuries. Callback conversation with reporter revealed the following information: the reporter stated the airplane was flown the next day after the cabin pressure controller was replaced and operated normally. The reporter said the passenger cabin only reached 10500 ft and the masks were not deployed.

Original NASA ASRS Text

Title: AN MD80 IN CRUISE AT FL280 DECLARED AN EMER AND DSNDED TO 10000 FT DUE TO LOSS OF CABIN PRESSURE CAUSED BY A FAILED CABIN PRESSURE CONTROLLER.

Narrative: CRUISING AT FL280, SELECTED ENG ANTI-ICE ON, CABIN STARTED CLBING IN EXCESS OF 1500 FPM. TURNED OFF EAI, CABIN CONTINUED TO CLB. ACCOMPLISHED 'LOSS OF PRESSURIZATION' CHKLIST, DECLARED AN EMER, SQUAWKED 7700, AND PERFORMED EMER DSCNT TO 10000 FT. CABIN ALT REACHED 10500 FT, MASKS DID NOT DROP AND NO PAX RPTED ANY DISCOMFORT OR INJURIES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE AIRPLANE WAS FLOWN THE NEXT DAY AFTER THE CABIN PRESSURE CONTROLLER WAS REPLACED AND OPERATED NORMALLY. THE RPTR SAID THE PAX CABIN ONLY REACHED 10500 FT AND THE MASKS WERE NOT DEPLOYED.

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.