Medium Transport; Low Wing; 2 Turbojet Eng
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 60; Flight Crew Total 11000; Flight Crew Type 500
Workload; Distraction; Situational Awareness; Confusion; Time Pressure
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach
Flight Crew Became Reoriented; Flight Crew FLC Overrode Automation; Flight Crew Overcame Equipment Problem
ATC Equipment / Nav Facility / Buildings
While on the ILS Runway 19 TEB we were established on the localizer inside of TUGGZ and were cleared for the ILS approach. We were level at 2;000 feet with the autopilot engaged. As the glideslope captured the aircraft made an abrupt climb. A correction was made to prevent continued climb on the glideslope and the aircraft followed a visual path backed up by the localizer. The climbing action was sudden and unexpected. We queried the Controller on the unexpected deviation in the glideslope and explained what had occurred. Further reading on this subject reveals that it is a known problem at Teterboro and is well known by the Teterboro users group. I feel given the severity of glideslope deviation and the high likely hood of occurrence that this needs to be addressed.
Medium transport Captain reported that during final ILS Runway 19 approach to TEB and established on the localizer with autopilot engaged the aircraft pitched up unexpectedly. Captain stated this is a known problem at this location by the airport community.