EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine
Flight Crew Last 90 Days 103; Flight Crew Total 1751; Flight Crew Type 233
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance
Environment - Non Weather Related; Procedure
Wake turbulence caused aircraft to lose 500-700 feet altitude abruptly. Maintained control of aircraft. NY Center reached out why we are descending. We advised it was from moderate/heavy wake turbulence. We were in trail of heavy aircraft landing IAD. We were cleared down to FL180 and the remainder of flight was normal.
E145 First Officer reported a wake turbulence encounter in trail of a heavy aircraft resulted in altitude loss of 500 to 700 feet on arrival into IAD.