Fearing an explosive decompression, flight emergency declared and descended.

Attributes
ACN	233161
Time
Date	199301
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dtw
State Reference	MI
Altitude	msl bound lower : 10000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob artcc : ttzp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 12000 flight time type : 5000
ASRS Report	233161
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 6000 flight time type : 700
ASRS Report	232488
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

Flight was late departing msp due to center windshield change, and was disputed at FL250 due to 1 pack operation. Approximately 40 mi northwest of dtw, high pressure leak occurred in vicinity of center windshield. Requested clearance to 10000 ft but ZOB was only able to clear us to 14000 ft, so declared emergency and descended to 10000 ft after slowing aircraft to 250 KTS, donning oxygen masks and seating passenger and crew. Noise went away and it appeared we had had a window seal failure. Continued to cle at 250 KTS and landed uneventfully.

Original NASA ASRS Text

Title: FEARING AN EXPLOSIVE DECOMPRESSION, FLT EMER DECLARED AND DSNDED.

Narrative: FLT WAS LATE DEPARTING MSP DUE TO CTR WINDSHIELD CHANGE, AND WAS DISPUTED AT FL250 DUE TO 1 PACK OP. APPROX 40 MI NW OF DTW, HIGH PRESSURE LEAK OCCURRED IN VICINITY OF CTR WINDSHIELD. REQUESTED CLRNC TO 10000 FT BUT ZOB WAS ONLY ABLE TO CLR US TO 14000 FT, SO DECLARED EMER AND DSNDED TO 10000 FT AFTER SLOWING ACFT TO 250 KTS, DONNING OXYGEN MASKS AND SEATING PAX AND CREW. NOISE WENT AWAY AND IT APPEARED WE HAD HAD A WINDOW SEAL FAILURE. CONTINUED TO CLE AT 250 KTS AND LANDED UNEVENTFULLY.

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.