Narrative:

I was flying the approach to runway 12 at mia in visual conditions. Aircraft were landing on runways 9, 9R and 12 with departures on runways 9L and 9R. The wind on the ATIS was reported at 090 degrees at 12 KTS. There were small twring cumulus clouds in the vicinity. The aircraft was in the landing confign, in the slot and cleared to land. There was light chop during the approach. Reference speed was 128 KTS and our speed during the approach was 134 KTS. At 500 ft the aircraft was on speed and sink of 600 FPM at 100 ft AGL also in the slot. At approximately 60 ft AGL the aircraft made an abrupt uncommanded roll to the right to about 20 degrees right wing down I corrected to the left to stop the roll. The ailerons felt marginal and unresponsive and at the same time I added power to arrest the sink. A series of corrective rolls was needed to level the wings. We touched down on the right main wheels first. The rollout was normal. I suspect that we encountered wake turbulence that drifted over from runway 9L. The aircraft in front of us on the runway 12 approach was a B727 more than 5 mi ahead.

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Original NASA ASRS Text

Title: FO OF A B757 TEMPORARILY LOST ACFT CTL DURING FINAL APCH AT 60 FT ABOVE THE GND BELIEVED DUE TO WAKE TURB OPS FROM NEAR BY PARALLEL RWYS, OR A B727 WHICH HAD PREVIOUSLY LANDED, AND WHICH WAS 5 MI AHEAD OF THEM ON FINAL APCH.

Narrative: I WAS FLYING THE APCH TO RWY 12 AT MIA IN VISUAL CONDITIONS. ACFT WERE LNDG ON RWYS 9, 9R AND 12 WITH DEPS ON RWYS 9L AND 9R. THE WIND ON THE ATIS WAS RPTED AT 090 DEGS AT 12 KTS. THERE WERE SMALL TWRING CUMULUS CLOUDS IN THE VICINITY. THE ACFT WAS IN THE LNDG CONFIGN, IN THE SLOT AND CLRED TO LAND. THERE WAS LIGHT CHOP DURING THE APCH. REF SPD WAS 128 KTS AND OUR SPD DURING THE APCH WAS 134 KTS. AT 500 FT THE ACFT WAS ON SPD AND SINK OF 600 FPM AT 100 FT AGL ALSO IN THE SLOT. AT APPROX 60 FT AGL THE ACFT MADE AN ABRUPT UNCOMMANDED ROLL TO THE R TO ABOUT 20 DEGS R WING DOWN I CORRECTED TO THE L TO STOP THE ROLL. THE AILERONS FELT MARGINAL AND UNRESPONSIVE AND AT THE SAME TIME I ADDED PWR TO ARREST THE SINK. A SERIES OF CORRECTIVE ROLLS WAS NEEDED TO LEVEL THE WINGS. WE TOUCHED DOWN ON THE R MAIN WHEELS FIRST. THE ROLLOUT WAS NORMAL. I SUSPECT THAT WE ENCOUNTERED WAKE TURB THAT DRIFTED OVER FROM RWY 9L. THE ACFT IN FRONT OF US ON THE RWY 12 APCH WAS A B727 MORE THAN 5 MI AHEAD.

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.