Hawker Horizon (Raytheon)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 60; Flight Crew Total 6750; Flight Crew Type 485
Confusion; Human-Machine Interface; Situational Awareness
Aircraft Equipment Problem Critical; Deviation - Altitude Crossing Restriction Not Met; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance
Procedure; Human Factors; Aircraft; Chart Or Publication
Approach cleared us direct to VINGS; 2;000 MSL and 210 KIAS. Prior to VINGS; Approach changed the clearance to an assigned heading or 090; maintain 2;000 FT until established; cleared for the ILS 6 at TEB. Since we were on an assigned heading to intercept the localizer we accepted the ACT (activate) VECTORS - YES feature of the Honeywell FMS which 'cleans up' the navigation display; depicts the localizer course and TORBY (FAF) was the next fix displayed. We intercepted the localizer course; maintaining 2;000 and were preparing for glideslope intercept when NY Approach indicated we should be over DANDY at 1;500 and to descend to 1;500. DANDY was not available for reference nor displayed. We began an immediate descent to 1;500 intercepted the glide slope; completed the approach and landing uneventfully.To ensure recollection and compliance with mandatory altitude constraints this information should be included in the Notes and/or Plan View sections of the associated approach charts. Also; diligent crew awareness and coordination is required when the FMS; displays no longer depict the fix/altitude and DME (raw data) is the only available remaining reference for DANDY.
When they were given vectors for the ILS Runway 6 at TEB the flight crew of a Hawker Horizon selected the 'Activate Vectors' mode of the Honeywell FMS; which removed the fix prior to the FAF; DANDY--which has a mandatory crossing at 1;500 MSL--from the display. They continued at their previously assigned 2;000 MSL; unaware of the need to cross the fix at the required altitude.  ATC caught the impending error and advised the crew of the need to descend.