Saab 340 Undifferentiated
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 210; Flight Crew Total 2400; Flight Crew Type 2200
Deviation - Altitude Excursion From Assigned Altitude; Deviation - Speed All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Procedure; Environment - Non Weather Related
On final approach we were assigned 2000 while 12-15 miles out from 8L at MIA. We were given 170 airspeed and were informed we would be exiting Bravo until re-entering at 10 miles out. We were informed we were following a B757 at 3000 ft (1000 ft above us). We were cleared for the visual approach to 8L. At approximately 11 miles out we encountered severe wake turbulence that caused us to climb 1000 ft and increase airspeed approximately 10 kts. We were also unable to maintain a heading for approximately 7 seconds. After stabilizing we were cleared to land 8L and proceeded as normal without any other occurrences for the remainder of the flight.
SF34 Captain reported encountering wake turbulence on arrival to MIA in trail of a B757 which resulted in altitude and track deviations.