Small Transport; Low Wing; 2 Turboprop Eng
Flight Crew Air Transport Pilot (ATP)
ATC Issue All Types; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Took Evasive Action; Flight Crew Regained Aircraft Control
Environment - Non Weather Related; Procedure
During approach to runway 4R behind a 737; ATC advised to 'descend and maintain 2;500 feet' upon reaching 2;500 feet we encountered buffet and then a strong roll to the left. I applied opposite aileron and the plane recovered after exiting the wake turbulence. I believe ATC instructions placed the aircraft in the direct path with the previous arrival's wake turbulence. Other company aircraft were allowed to 'descend at pilot's discretion' and I believe that should have been our instructions.
A pilot reported encountering wake turbulence on approach to BOS in trail of a B737. Reporter stated he would have been happier with 'descend at pilot's discretion' clearance.