Narrative:

Autoplt was flying. We had just captured the GS and we were cleared for the approach (ILS 4R) to maintain 170 KTS IAS to the marker. We were approximately 4-5 mi behind a heavy widebody transport. Winds were from northeast at 10 KTS. We encountered the widebody transport wake about 3500 ft MSL, with the autoplt on, speed of 170. The aircraft rolled 45 -60 degrees to the left, followed by the stick shaker. I immediately disconnected the autoplt and initiated stall recovery procedures. We continued for landing and landed without any further problems. No passenger injuries or problems were reported. The flight attendant reported that some beverages were dropped. 4-5 mi with winds at 10 KTS can disturb the normal flight characteristic of a large turbine pwred aircraft.

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Original NASA ASRS Text

Title: LTT ON APCH 4 TO 5 MI BEHIND A WDB AT 3500 FT ENCOUNTERS WAKE TURB. 45 TO 60 DEG BANK AND STICK SHAKER. RECOVERS.

Narrative: AUTOPLT WAS FLYING. WE HAD JUST CAPTURED THE GS AND WE WERE CLRED FOR THE APCH (ILS 4R) TO MAINTAIN 170 KTS IAS TO THE MARKER. WE WERE APPROX 4-5 MI BEHIND A HVY WDB. WINDS WERE FROM NE AT 10 KTS. WE ENCOUNTERED THE WDB WAKE ABOUT 3500 FT MSL, WITH THE AUTOPLT ON, SPD OF 170. THE ACFT ROLLED 45 -60 DEGS TO THE L, FOLLOWED BY THE STICK SHAKER. I IMMEDIATELY DISCONNECTED THE AUTOPLT AND INITIATED STALL RECOVERY PROCS. WE CONTINUED FOR LNDG AND LANDED WITHOUT ANY FURTHER PROBLEMS. NO PAX INJURIES OR PROBLEMS WERE RPTED. THE FLT ATTENDANT RPTED THAT SOME BEVERAGES WERE DROPPED. 4-5 MI WITH WINDS AT 10 KTS CAN DISTURB THE NORMAL FLT CHARACTERISTIC OF A LARGE TURBINE PWRED 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.