An md-80 encountered wake turbulence behind a B-757.

Attributes
ACN	272080
Time
Date	199405
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 300 agl bound upper : 500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : den
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial climbout : takeoff cruise other
Route In Use	enroute : on vectors
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	climbout : initial climbout : takeoff cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 140 flight time total : 9500 flight time type : 3200
ASRS Report	272080
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Takeoff behind 757, 757 was approximately 300-500 ft when we were given our takeoff clearance. We were given a 'caution wake turbulence' advisory. I told first officer to not rotate quickly and to watch for turbulence from the 757 as we were both given a turn to 010 degree after takeoff. The 757 began his turn immediately after takeoff and I told the first officer to delay the turn and to turn outside the 757's flight path. At 300 ft AGL on runway heading we encountered a wake turbulence which disturbed the airflow on our right wing and gave us a right rolling moment which took a moderate control input to correct. Encounter lasted 2-3 seconds. This is my 4TH encounter behind a 757 (all in MD80's). The FAA should provide increased separation behind this aircraft -- especially during takeoff.

Original NASA ASRS Text

Title: AN MD-80 ENCOUNTERED WAKE TURB BEHIND A B-757.

Narrative: TKOF BEHIND 757, 757 WAS APPROX 300-500 FT WHEN WE WERE GIVEN OUR TKOF CLRNC. WE WERE GIVEN A 'CAUTION WAKE TURB' ADVISORY. I TOLD FO TO NOT ROTATE QUICKLY AND TO WATCH FOR TURB FROM THE 757 AS WE WERE BOTH GIVEN A TURN TO 010 DEG AFTER TKOF. THE 757 BEGAN HIS TURN IMMEDIATELY AFTER TKOF AND I TOLD THE FO TO DELAY THE TURN AND TO TURN OUTSIDE THE 757'S FLT PATH. AT 300 FT AGL ON RWY HDG WE ENCOUNTERED A WAKE TURB WHICH DISTURBED THE AIRFLOW ON OUR R WING AND GAVE US A R ROLLING MOMENT WHICH TOOK A MODERATE CTL INPUT TO CORRECT. ENCOUNTER LASTED 2-3 SECONDS. THIS IS MY 4TH ENCOUNTER BEHIND A 757 (ALL IN MD80'S). THE FAA SHOULD PROVIDE INCREASED SEPARATION BEHIND THIS ACFT -- ESPECIALLY DURING TKOF.

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.