<< >> NASA ASRS Report 384026, October 1997

Flight crew of B757 has windshear alert activate and take emergency action to go around. They are unable to initially comply with ATC instructions to level at 1600 ft.

Attributes
ACN	384026
Time
Date	199710
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 900 msl bound upper : 900
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Controlling Facilities	tower : ord tower : jfk
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	384026
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter : weather non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Weather

Narrative:

ATC facility: ord tower. Location: ILS final runway 4R. With winds 050 degrees at steady over 30 KTS and gusting to over 40 KTS, the first officer was briefed on the possibility of windshear and the parameters of recognition were reviewed. A windshear alert was annunciated in the aircraft at about 900 ft and the escape procedure was accomplished. The first officer was flying and accomplished the proper procedures. ATC requested a heading change immediately to 090 degrees and altitude of only 1600 ft. With the escape procedure power at go around and the nose at a high attitude, it was not safe to comply with their instructions. After the emergency was over and the aircraft under control, the ATC instructions were complied with. There were other aircraft that went missed as well. The next approach was completed safely. The first officer did an outstanding job flying the aircraft.

Related reports:

• Windshear on approach, go around executed, but confusion res...
• Jfk local controller and the three pilots aboard a B757 repo...
• Windshear encounter and go around during approach when anoth...
• During a missed approach due to severe turbulence and windsh...
• A B757 flight crew does a go around due to windshear, receiv...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: FLC OF B757 HAS WINDSHEAR ALERT ACTIVATE AND TAKE EMER ACTION TO GAR. THEY ARE UNABLE TO INITIALLY COMPLY WITH ATC INSTRUCTIONS TO LEVEL AT 1600 FT.

Narrative: ATC FACILITY: ORD TWR. LOCATION: ILS FINAL RWY 4R. WITH WINDS 050 DEGS AT STEADY OVER 30 KTS AND GUSTING TO OVER 40 KTS, THE FO WAS BRIEFED ON THE POSSIBILITY OF WINDSHEAR AND THE PARAMETERS OF RECOGNITION WERE REVIEWED. A WINDSHEAR ALERT WAS ANNUNCIATED IN THE ACFT AT ABOUT 900 FT AND THE ESCAPE PROC WAS ACCOMPLISHED. THE FO WAS FLYING AND ACCOMPLISHED THE PROPER PROCS. ATC REQUESTED A HEADING CHANGE IMMEDIATELY TO 090 DEGS AND ALT OF ONLY 1600 FT. WITH THE ESCAPE PROC PWR AT GAR AND THE NOSE AT A HIGH ATTITUDE, IT WAS NOT SAFE TO COMPLY WITH THEIR INSTRUCTIONS. AFTER THE EMER WAS OVER AND THE ACFT UNDER CTL, THE ATC INSTRUCTIONS WERE COMPLIED WITH. THERE WERE OTHER ACFT THAT WENT MISSED AS WELL. THE NEXT APCH WAS COMPLETED SAFELY. THE FO DID AN OUTSTANDING JOB FLYING THE ACFT.

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.