Narrative:

We were on the runway 18L localizer north of reise intersection at 3000 ft and cleared for the ILS rw 18L approach. We were configured with flaps 10; gear up; and flying approximately 180 KIAS in IMC with rain and light to moderate turbulence. Wind was out of the southwest at 50-60 knots at 3000 ft. Autopilot was engaged. The airplane suddenly rolled right; then left exceeding 30 degrees of bank each way. The autopilot remained engaged; and came back to wings level. About 3 seconds later; it happened again with high roll rates and bank angles nearing 45 deg. I disconnected the autopilot and initiated a climb out of wake turbulence. We were able to re-establish and fly the approach to landing without further incident. We reported it to ATC and asked ATC what type of plane we were following. They said we were #1 for 18L; but there was traffic for the parallel runways. ATC was busy; so we didn't query any further. Our 2 passengers were pretty shaken up about it; but we calmed them the best we could. I contacted mem approach control by telephone and reported it to him. He said they would review the tapes.

Google
 

Original NASA ASRS Text

Title: CL30 pilot reported the aircraft rolled suddenly left and right exceeding 30 degrees of bank after encountering wake turbulence on approach to MEM.

Narrative: We were on the Runway 18L localizer north of REISE intersection at 3000 ft and cleared for the ILS RW 18L approach. We were configured with flaps 10; gear up; and flying approximately 180 KIAS in IMC with rain and light to moderate turbulence. Wind was out of the southwest at 50-60 knots at 3000 ft. Autopilot was engaged. The airplane suddenly rolled right; then left exceeding 30 degrees of bank each way. The autopilot remained engaged; and came back to wings level. About 3 seconds later; it happened again with high roll rates and bank angles nearing 45 deg. I disconnected the autopilot and initiated a climb out of wake turbulence. We were able to re-establish and fly the approach to landing without further incident. We reported it to ATC and asked ATC what type of plane we were following. They said we were #1 for 18L; but there was traffic for the parallel runways. ATC was busy; so we didn't query any further. Our 2 passengers were pretty shaken up about it; but we calmed them the best we could. I contacted MEM Approach Control by telephone and reported it to him. He said they would review the tapes.

Data retrieved from NASA's ASRS site 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.