Medium Transport
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Workload; Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Weather / Turbulence
Flight Crew Returned To Clearance; Flight Crew Regained Aircraft Control
Weather
While in descent on the JAIKE3 arrival into TEB; we encountered extreme to severe turbulence 4 miles [south] of ILENE intersection; causing the airplane autopilot to disengage and subsequently result in a loss of altitude of 1;400 ft from 13;000 ft; stop at 11;600 ft. [Pilot not flying] immediately notified ATC of the event. Then ATC assigned new altitude of 11;000 ft until WACKY intersection to continue descend via the JAIKE3 arrival.
We were descending into TEB via the JAIKE arrival at 13;000 ft when we encountered severe turbulence due to thunderstorms in the area which caused the autopilot to disengage and we began to lose altitude. We regained control of the plane after losing approx 1;400 ft. We were then told by ATC to maintain 11;000 ft and continue our descent on the JAIKE. We experienced no further problems and the descent into TEB was normal. We heard nothing further from Philadelphia or New York ATC.
Medium Transport flight crew reported encountering severe turbulence resulting in altitude loss of approximately 1400 feet.