Wake turbulence on final approach at 200 ft AGL.

Attributes
ACN	303981
Time
Date	199505
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : atl
State Reference	GA
Altitude	agl bound lower : 200 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : atl
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
Aircraft 2
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 landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	controller radar : 4 flight time last 90 days : 200 flight time total : 9000
ASRS Report	303981
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Moderate to severe wake turbulence at MM, runway 8L, 3 mi behind a previous landing B757. Almost full aileron used in each direction and power added to increase speed reference plus 10 KTS, followed by a go around due to a destabilized approach approximately 150- 200 ft AGL. Wind 160 degrees at 3 KTS. Callback conversation with reporter revealed the following: reporter participated in wake turbulence incident questionnaire. Did not expect turbulence as he was flying 1 DOT high on GS all the way down final. The effects of wake turbulence was to roll the wings from 45 degrees left to 45 degrees right, all this at 200 ft AGL. Flight crew initiated a go around since the approach had become destabilized. No harm or damage to aircraft, flight crew, or passenger. Subsequent approach and landing were uneventful. In the future the reporter plans to keep good distance between the leading aircraft and his. Also, he plans on flying about 1 DOT high on the GS.

Original NASA ASRS Text

Title: WAKE TURB ON FINAL APCH AT 200 FT AGL.

Narrative: MODERATE TO SEVERE WAKE TURB AT MM, RWY 8L, 3 MI BEHIND A PREVIOUS LNDG B757. ALMOST FULL AILERON USED IN EACH DIRECTION AND PWR ADDED TO INCREASE SPD REF PLUS 10 KTS, FOLLOWED BY A GAR DUE TO A DESTABILIZED APCH APPROX 150- 200 FT AGL. WIND 160 DEGS AT 3 KTS. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR PARTICIPATED IN WAKE TURB INCIDENT QUESTIONNAIRE. DID NOT EXPECT TURB AS HE WAS FLYING 1 DOT HIGH ON GS ALL THE WAY DOWN FINAL. THE EFFECTS OF WAKE TURB WAS TO ROLL THE WINGS FROM 45 DEGS L TO 45 DEGS R, ALL THIS AT 200 FT AGL. FLC INITIATED A GAR SINCE THE APCH HAD BECOME DESTABILIZED. NO HARM OR DAMAGE TO ACFT, FLC, OR PAX. SUBSEQUENT APCH AND LNDG WERE UNEVENTFUL. IN THE FUTURE THE RPTR PLANS TO KEEP GOOD DISTANCE BTWN THE LEADING ACFT AND HIS. ALSO, HE PLANS ON FLYING ABOUT 1 DOT HIGH ON THE GS.

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.