Citation V/Ultra/Encore (C560)
Flight Crew Air Transport Pilot (ATP)
Deviation - Altitude Excursion From Assigned Altitude; Inflight Event / Encounter Wake Vortex Encounter; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew Regained Aircraft Control; Flight Crew Requested ATC Assistance / Clarification
Procedure; Environment - Non Weather Related
During vectors for approach; crew was advised they were 7 nm in trail of a B737. Prior to the FAF; encountered a sharp roll left; followed by roll right to a 90 degree angle.  Altitude loss was less than 300 feet. Crew recovered aircraft to assigned altitude; advised ATC of severe turbulence encounter; and continued a normal approach to landing. Subsequent inspection by Maintenance determined no airframe damage.
CE560 pilot reported a 90-degree roll resulted after encountering wake turbulence from preceding B737 on approach to PHL.