Narrative:

On visual approach to runway 26R ATC following air carrier X, feb/xx/98 at XX05. Approach initiated at 5000 ft, air carrier (B727) approximately 3 mi ahead. At approximately 4500 ft, after both aircraft had started down GS, we started a roll to left and initiated right aileron which was insufficient and was followed very shortly by full right rudder which helped. Soon after leveling we rolled right. Left roll 50 degrees, right roll 40 degrees. Right roll easier to control than left. This was caused by B727 going high on GS. We were both on localizer, both intercepted GS at 5000 ft and we stayed on GS. Callback conversation with reporter revealed the following information: reporter participated in the structured callback program. Reporter idented the aircraft he was following as a B727-200. He was following right on GS thinking might possibly encounter wake turbulence, but his real surprise was that when he did encounter the wake how strong it was to cause the 50 degree rolling to left and right. The rolling motion created temporary stress and increased workload for the flight crew. There were some passenger complaints. Reporter stated the cause of the encounter was because the leading aircraft was flying high on the GS which placed the wake right at reporter's altitude for the wake to take effect on his aircraft.

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Original NASA ASRS Text

Title: AN ATR72-212 EXPERIENCES WAKE TURB FOLLOWING A B727-200 DURING APCH TO ATL, GA.

Narrative: ON VISUAL APCH TO RWY 26R ATC FOLLOWING ACR X, FEB/XX/98 AT XX05. APCH INITIATED AT 5000 FT, ACR (B727) APPROX 3 MI AHEAD. AT APPROX 4500 FT, AFTER BOTH ACFT HAD STARTED DOWN GS, WE STARTED A ROLL TO L AND INITIATED R AILERON WHICH WAS INSUFFICIENT AND WAS FOLLOWED VERY SHORTLY BY FULL R RUDDER WHICH HELPED. SOON AFTER LEVELING WE ROLLED R. L ROLL 50 DEGS, R ROLL 40 DEGS. R ROLL EASIER TO CTL THAN L. THIS WAS CAUSED BY B727 GOING HIGH ON GS. WE WERE BOTH ON LOC, BOTH INTERCEPTED GS AT 5000 FT AND WE STAYED ON GS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR PARTICIPATED IN THE STRUCTURED CALLBACK PROGRAM. RPTR IDENTED THE ACFT HE WAS FOLLOWING AS A B727-200. HE WAS FOLLOWING R ON GS THINKING MIGHT POSSIBLY ENCOUNTER WAKE TURB, BUT HIS REAL SURPRISE WAS THAT WHEN HE DID ENCOUNTER THE WAKE HOW STRONG IT WAS TO CAUSE THE 50 DEG ROLLING TO L AND R. THE ROLLING MOTION CREATED TEMPORARY STRESS AND INCREASED WORKLOAD FOR THE FLC. THERE WERE SOME PAX COMPLAINTS. RPTR STATED THE CAUSE OF THE ENCOUNTER WAS BECAUSE THE LEADING ACFT WAS FLYING HIGH ON THE GS WHICH PLACED THE WAKE RIGHT AT RPTR'S ALT FOR THE WAKE TO TAKE EFFECT ON HIS ACFT.

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.