Medium large transport encounters wake turbulence when landing behind an large transport.

Attributes
ACN	235192
Time
Date	199303
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mco
State Reference	FL
Altitude	agl bound lower : 200 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mco artcc : zhu
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
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 : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 8000 flight time type : 4000
ASRS Report	235192
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 10000 flight time type : 2000
ASRS Report	235322
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : exited adverse environment
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Landing behind an large transport. On final approach at approximately 200 ft AGL, we experienced wake turbulence from the large transport who was about 4 mi ahead. Our aircraft experienced a roll to the right of about 15 degrees. It was not an abrupt or turbulent roll, but a steady, smooth roll. The captain added power and rolled wings level and our aircraft recovered immediately. A go around was not deemed necessary due to the fact that we recovered immediately and were in a safe position to land. The remainder of the landing and rollout was uneventful. Upon landing, we asked tower our separation on the large transport and they confirmed 4 mi. Supplemental information from acn 235322: when we encountered the wake turbulence, I was somewhat surprised, since we had such good spacing behind the large transport. However, ATIS was reporting a wind of 340/4 KTS which I'm sure kept the wake vortex right in the approach path. Because of our 'slam dunk' approach, we were preoccupied with getting the aircraft down and were distracted from thinking about or discussing the possibility of wake turbulence.

Original NASA ASRS Text

Title: MLG ENCOUNTERS WAKE TURB WHEN LNDG BEHIND AN LGT.

Narrative: LNDG BEHIND AN LGT. ON FINAL APCH AT APPROX 200 FT AGL, WE EXPERIENCED WAKE TURB FROM THE LGT WHO WAS ABOUT 4 MI AHEAD. OUR ACFT EXPERIENCED A ROLL TO THE R OF ABOUT 15 DEGS. IT WAS NOT AN ABRUPT OR TURBULENT ROLL, BUT A STEADY, SMOOTH ROLL. THE CAPT ADDED PWR AND ROLLED WINGS LEVEL AND OUR ACFT RECOVERED IMMEDIATELY. A GAR WAS NOT DEEMED NECESSARY DUE TO THE FACT THAT WE RECOVERED IMMEDIATELY AND WERE IN A SAFE POS TO LAND. THE REMAINDER OF THE LNDG AND ROLLOUT WAS UNEVENTFUL. UPON LNDG, WE ASKED TWR OUR SEPARATION ON THE LGT AND THEY CONFIRMED 4 MI. SUPPLEMENTAL INFO FROM ACN 235322: WHEN WE ENCOUNTERED THE WAKE TURB, I WAS SOMEWHAT SURPRISED, SINCE WE HAD SUCH GOOD SPACING BEHIND THE LGT. HOWEVER, ATIS WAS RPTING A WIND OF 340/4 KTS WHICH I'M SURE KEPT THE WAKE VORTEX RIGHT IN THE APCH PATH. BECAUSE OF OUR 'SLAM DUNK' APCH, WE WERE PREOCCUPIED WITH GETTING THE ACFT DOWN AND WERE DISTRACTED FROM THINKING ABOUT OR DISCUSSING THE POSSIBILITY OF WAKE TURB.

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.