Windshear alert received by the flight crew of an A320 at 1200 ft AGL on approach to runway 35L at d...

Attributes
ACN	541702
Time
Date	200203
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	agl single value : 1200
Environment
Flight Conditions	VMC
Weather Elements	Turbulence Rain Windshear
Light	Daylight
Aircraft 1
Controlling Facilities	tower : den.tower
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
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 : 23000 flight time type : 900
ASRS Report	541702
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	inflight encounter : turbulence other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : windshear alert other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance Weather Airport ATC Human Performance
Primary Problem	Weather

Narrative:

We wre on a 4 mi final to runway 35L at denver. The aircraft was in landing confign on the GS. The flight was stable with airspeed at about 140 KTS and vertical speed -800 FPM. The ride on the descent had been light approaching moderate turbulence below 15000 ft. There was virga in the area. We also received a message on downwind that a den windshear alert is canceled. At about 1200 ft AGL, we received a momentary windshear alert. The airspeed was 135 KTS and vertical speed -1200 FPM. We were on the GS. The airspeed stable, trend arrow zero, and vertical speed was constant at -1200 FPM. The pitch, roll, and yaw changes were no greater than we had been experiencing since we entered the turbulent air. The airspeed increased to 140 KTS and vertical speed back to -800 FPM. We continued the visual approach. The airspeed had been fluctuating -5 to +10 KTS much of the time we were below 15000 ft.

Original NASA ASRS Text

Title: WINDSHEAR ALERT RECEIVED BY THE FLC OF AN A320 AT 1200 FT AGL ON APCH TO RWY 35L AT DEN, CO.

Narrative: WE WRE ON A 4 MI FINAL TO RWY 35L AT DENVER. THE ACFT WAS IN LNDG CONFIGN ON THE GS. THE FLT WAS STABLE WITH AIRSPD AT ABOUT 140 KTS AND VERT SPD -800 FPM. THE RIDE ON THE DSCNT HAD BEEN LIGHT APCHING MODERATE TURB BELOW 15000 FT. THERE WAS VIRGA IN THE AREA. WE ALSO RECEIVED A MESSAGE ON DOWNWIND THAT A DEN WINDSHEAR ALERT IS CANCELED. AT ABOUT 1200 FT AGL, WE RECEIVED A MOMENTARY WINDSHEAR ALERT. THE AIRSPD WAS 135 KTS AND VERT SPD -1200 FPM. WE WERE ON THE GS. THE AIRSPD STABLE, TREND ARROW ZERO, AND VERT SPD WAS CONSTANT AT -1200 FPM. THE PITCH, ROLL, AND YAW CHANGES WERE NO GREATER THAN WE HAD BEEN EXPERIENCING SINCE WE ENTERED THE TURBULENT AIR. THE AIRSPD INCREASED TO 140 KTS AND VERT SPD BACK TO -800 FPM. WE CONTINUED THE VISUAL APCH. THE AIRSPD HAD BEEN FLUCTUATING -5 TO +10 KTS MUCH OF THE TIME WE WERE BELOW 15000 FT.

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.

Windshear alert received by the flight crew of an A320 at 1200 ft AGL on approach to runway 35L at den, co.