<< >> NASA ASRS Report 422069, December 1998

B757 crew executed a go around after encountering moderate to severe turbulence on short final for runway 21R at dtw.

Attributes
ACN	422069
Time
Date	199812
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dtw
State Reference	MI
Altitude	agl bound lower : 50 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Navigation In Use	Other
Flight Phase	landing other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Navigation In Use	Other
Flight Phase	ground : parked ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 110 flight time total : 14900 flight time type : 2000
ASRS Report	422069
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Air Traffic Incident	other
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Landing runway 21R, no recent preceding traffic, captain (me) flying. At 200 ft AGL, encountered unrpted brief moderate turbulence causing large aileron corrections to counter. At approximately 50 ft AGL, moderate to severe turbulence again encountered. Go around initiated with aircraft touching down briefly after go around started. Returned for second approach, landing was uneventful. No apparent meteorological conditions to explain our turbulence. Wind was 230 degrees at 10 KTS. No reports of turbulence both before and after our go around. A B747-400 was parked or positioning to park at a gate at the international terminal. Per a phone call to dtw tower, it was rptedly at idle power. Its exhaust, in this location, goes in the direction of the short final approach end of runway 21R.

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Original NASA ASRS Text

Title: B757 CREW EXECUTED A GAR AFTER ENCOUNTERING MODERATE TO SEVERE TURB ON SHORT FINAL FOR RWY 21R AT DTW.

Narrative: LNDG RWY 21R, NO RECENT PRECEDING TFC, CAPT (ME) FLYING. AT 200 FT AGL, ENCOUNTERED UNRPTED BRIEF MODERATE TURB CAUSING LARGE AILERON CORRECTIONS TO COUNTER. AT APPROX 50 FT AGL, MODERATE TO SEVERE TURB AGAIN ENCOUNTERED. GAR INITIATED WITH ACFT TOUCHING DOWN BRIEFLY AFTER GAR STARTED. RETURNED FOR SECOND APCH, LNDG WAS UNEVENTFUL. NO APPARENT METEOROLOGICAL CONDITIONS TO EXPLAIN OUR TURB. WIND WAS 230 DEGS AT 10 KTS. NO RPTS OF TURB BOTH BEFORE AND AFTER OUR GAR. A B747-400 WAS PARKED OR POSITIONING TO PARK AT A GATE AT THE INTL TERMINAL. PER A PHONE CALL TO DTW TWR, IT WAS RPTEDLY AT IDLE PWR. ITS EXHAUST, IN THIS LOCATION, GOES IN THE DIRECTION OF THE SHORT FINAL APCH END OF RWY 21R.

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.