Date: 201910
Local time of day: 0601-1200
Location: EWR.Airport, NJ
Weather elements / visibility: Turbulence
Aircraft: B757 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Flight phase: Initial Climb
Airspace: Class B EWR
ATC / advisory: TRACON N90
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Second reporter function: Pilot Flying; Captain
Anomaly: Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Returned To Clearance
Contributing factors: Weather
Primary problem: Weather

Narrative: Departed EWR Runway 22R full length. LLWS advisories were in effect. Crew took necessary windshear mitigation measures. Flaps and gear were retracted on schedule during takeoff phase. At approximately 1800AGL we encountered moderate to severe turbulence. The turbulence was severe enough to cause the Pilot Monitoring (PM) to inadvertently put the gear handle in the down position momentarily while trying to put it to the off position. PM immediately put gear to up position and continued climb out. No gear over speed. Severe turbulence also caused the Pilot Flying to exceed SID top altitude (2500AGL) by approximately 300ft. While correcting; ATC cleared us to 6000. During event no windshear warning was encountered. No mandatory 'turbulence' calls were made to cabin because of the phase of flight and all passengers and crew were seated. Captain did advise Cabin crew to stay seated until we called to let them know it was safe to get up. Submitted PIREP; made logbook entry and sent message to dispatch per FOM directives.


Second narrative: Departed EWR on 22R. LLWS advisories in effect per ATIS. Crew briefed and executed windshear departure procedure profile. Put gear and flaps up on schedule; during takeoff phase. During climb out phase; encountered severe turbulence so severe; that it caused Pilot Monitoring to inadvertently put gear handle to 'down' position; when trying to move handle to the 'off' position. Immediately cycled gear to 'up' position; and continued climb out. No gear over speed. Once crew departed turbulence area; cycled gear handle to 'off' position; and completed after takeoff checklist. On climb out phase; because of the turbulence; Pilot Flying exceeded SID altitude limit of EWR 4 by 300'. While correcting; ATC cleared us to 6000'. Aircraft did not state windshear advisory/warning during departure. No mandatory 'turbulence' calls made in cabin. Event occurred during takeoff/climb out phases. Crew and passengers were seated. Did communicate 'Flight Attendants check in' over Public Address; after event to check on crew; and explain situation. Flight continued with no further events. Submitted PIREP and logbook entry per fight manual directives.


Synopsis: B-757 flight crew reported encountering severe turbulence during departure from Newark; which caused an overshoot of assigned altitude.