An E120 crew, on short final to atl, executed a go around when encountering windshear.

Attributes
ACN	541654
Time
Date	200203
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	agl single value : 50
Environment
Flight Conditions	VMC
Weather Elements	Turbulence Windshear
Light	Daylight
Aircraft 1
Controlling Facilities	tower : atl.tower
Operator	common carrier : air carrier
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 3500 flight time type : 1400
ASRS Report	541654
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : turbulence inflight encounter : weather inflight encounter other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Weather Flight Crew Human Performance Environmental Factor
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On very short final over threshold for runway 27L at 30 ft AGL we encountered a loss of 20 KIAS which caused an excessive sink rate and activation of the stick shaker. Maximum power was applied and a go around was initiated. Windshear had been previously reported and the aircraft was configured for a flaps 25 degree landing per poh. After go around, we advised ATC of windshear, and then passenger address was made. We were assigned an altitude of 3000 ft and due to the turbulence we deviated our altitude by 220 ft above. The appropriate checklists were complied with and the second approach also encountered windshear, however, not as severe. The second landing was uneventful. This report was also submitted to the company.

Original NASA ASRS Text

Title: AN E120 CREW, ON SHORT FINAL TO ATL, EXECUTED A GAR WHEN ENCOUNTERING WINDSHEAR.

Narrative: ON VERY SHORT FINAL OVER THRESHOLD FOR RWY 27L AT 30 FT AGL WE ENCOUNTERED A LOSS OF 20 KIAS WHICH CAUSED AN EXCESSIVE SINK RATE AND ACTIVATION OF THE STICK SHAKER. MAX PWR WAS APPLIED AND A GAR WAS INITIATED. WINDSHEAR HAD BEEN PREVIOUSLY RPTED AND THE ACFT WAS CONFIGURED FOR A FLAPS 25 DEG LNDG PER POH. AFTER GAR, WE ADVISED ATC OF WINDSHEAR, AND THEN PAX ADDRESS WAS MADE. WE WERE ASSIGNED AN ALT OF 3000 FT AND DUE TO THE TURB WE DEVIATED OUR ALT BY 220 FT ABOVE. THE APPROPRIATE CHKLISTS WERE COMPLIED WITH AND THE SECOND APCH ALSO ENCOUNTERED WINDSHEAR, HOWEVER, NOT AS SEVERE. THE SECOND LNDG WAS UNEVENTFUL. THIS RPT WAS ALSO SUBMITTED TO THE COMPANY.

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.