<< >> NASA ASRS Report 362402, March 1997

A C560 climbing through FL402 experienced loud main cabin door seal pressure leak. Declared emergency and descended to 11000 ft.

Attributes
ACN	362402
Time
Date	199703
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dec
State Reference	IL
Altitude	msl bound lower : 40200 msl bound upper : 40200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	Citation V
Operating Under FAR Part	Part 121
Navigation In Use	Other 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 : cfi pilot : atp
Experience	flight time last 90 days : 250 flight time total : 8000 flight time type : 6000
ASRS Report	362402
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	other flight crewa other other : unspecified cockpit
Resolutory Action	flight crew : declared emergency other
Consequence	Other

Narrative:

Climbing through FL402, main door seal began hissing, then squealing and a loud air flow noise was heard. First officer noticed daylight around top of door. An emergency descent was initiated, and an emergency was declared due to that. Level at 11000 ft, the emergency was canceled, and normal handling, routing, squawk was requested to a maintenance base at mke.

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Original NASA ASRS Text

Title: A C560 CLBING THROUGH FL402 EXPERIENCED LOUD MAIN CABIN DOOR SEAL PRESSURE LEAK. DECLARED EMER AND DSNDED TO 11000 FT.

Narrative: CLBING THROUGH FL402, MAIN DOOR SEAL BEGAN HISSING, THEN SQUEALING AND A LOUD AIR FLOW NOISE WAS HEARD. FO NOTICED DAYLIGHT AROUND TOP OF DOOR. AN EMER DSCNT WAS INITIATED, AND AN EMER WAS DECLARED DUE TO THAT. LEVEL AT 11000 FT, THE EMER WAS CANCELED, AND NORMAL HANDLING, ROUTING, SQUAWK WAS REQUESTED TO A MAINT BASE AT MKE.

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.