Embraer Jet Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Multiengine
Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Returned To Clearance
Environment - Non Weather Related; Procedure
During approach we were base to final cleared for the ILS approach. We were between TEB and GIMEE at 2500 feet. We encountered what we believe to be wake turbulence. It started to roll the aircraft in one direction then immediately flipped to the other. It was strong enough to disengage the autopilot. While we were recovering the aircraft attitude we dipped down to about 2300 feet MSL. While recovering we informed ATC of the wake and that we could continue visually. We were simultaneously intercepting the localizer; glidepath; and dealing with the upset. We may have dipped below glideslope. After the corrections were made we were able to continue the approach without further issues.
Embraer Regional Jet First Officer reported an altitude deviation occurred when they encountered wake turbulence in the landing pattern at EWR.