Aft service door comes open in flight. Emergency declared.

Attributes
ACN	122194
Time
Date	198909
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : guc airport : dro
State Reference	CO
Altitude	msl bound lower : 22000 msl bound upper : 22000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	Medium Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 3700
ASRS Report	122194
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other other : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

On flight from durango, co to denver climbing through FL220, cabin depressurized and door warning light came on. Declared emergency, started descent and executed cabin depressurization and emergency descent checklists. F/a advised aft service door was open. Diverted flight to guc.

Original NASA ASRS Text

Title: AFT SERVICE DOOR COMES OPEN IN FLT. EMERGENCY DECLARED.

Narrative: ON FLT FROM DURANGO, CO TO DENVER CLIMBING THROUGH FL220, CABIN DEPRESSURIZED AND DOOR WARNING LIGHT CAME ON. DECLARED EMER, STARTED DSCNT AND EXECUTED CABIN DEPRESSURIZATION AND EMER DSCNT CHECKLISTS. F/A ADVISED AFT SERVICE DOOR WAS OPEN. DIVERTED FLT TO GUC.

Data retrieved from NASA's ASRS site as of August 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.