Wind shear reporting.

Attributes
ACN	287956
Time
Date	199411
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : den
State Reference	CO
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : den
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 135 flight time total : 9170 flight time type : 135
ASRS Report	287956
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	inflight encounter : weather non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : regained aircraft control
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Switched to den tower frequency for takeoff. Another aircraft was asking why tower did not pass along previous report of 10 KT loss of airspeed. Tower response ' we don't show anything on our instruments' the next aircraft to depart reported 10 KT loss at 500 ft AGL -- no response from tower we briefed for possible windshear on takeoff. (Fog bank north end of runway, tops at 500 ft AGL suspected wind shift.) at 500 ft AGL we lost 12 KTS and relieved aural wind shear warning. We reported this to tower and asked if they were going to pass it along, again they stated 'we don't show any on our instruments' -- our company was notified and passed along, 'but what about everyone else? How could this happen? If I was not involved I would not believe it!

Original NASA ASRS Text

Title: WIND SHEAR RPTING.

Narrative: SWITCHED TO DEN TWR FREQ FOR TKOF. ANOTHER ACFT WAS ASKING WHY TWR DID NOT PASS ALONG PREVIOUS RPT OF 10 KT LOSS OF AIRSPD. TWR RESPONSE ' WE DON'T SHOW ANYTHING ON OUR INSTS' THE NEXT ACFT TO DEPART RPTED 10 KT LOSS AT 500 FT AGL -- NO RESPONSE FROM TWR WE BRIEFED FOR POSSIBLE WINDSHEAR ON TKOF. (FOG BANK N END OF RWY, TOPS AT 500 FT AGL SUSPECTED WIND SHIFT.) AT 500 FT AGL WE LOST 12 KTS AND RELIEVED AURAL WIND SHEAR WARNING. WE RPTED THIS TO TWR AND ASKED IF THEY WERE GOING TO PASS IT ALONG, AGAIN THEY STATED 'WE DON'T SHOW ANY ON OUR INSTS' -- OUR COMPANY WAS NOTIFIED AND PASSED ALONG, 'BUT WHAT ABOUT EVERYONE ELSE? HOW COULD THIS HAPPEN? IF I WAS NOT INVOLVED I WOULD NOT BELIEVE IT!

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.