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EGPWS
Enhanced ground proximity warning system
Uses aircraft position, configuration, and a terrain database. The terrain database is the difference between a GPWS and an EGPWS. The EGPWS is in MAU 2 and is powered by DC ESS Bus 2. Input is from:
- ADS
- FMS
- GPS
- IRS
- radar altimeter
- slats and flaps control system
Modes
| Mode 1 | excessive descent rate | "Sink rate" x2, "Pull up" x3 |
| Mode 2 | excessive closure to terrain | "Terrain" x2, "Pull up" x3 |
| Mode 3 | altitude loss after takeoff | "Don't sink" x2 |
| Mode 4 | unsafe terrain clearance | "Too low terrain - too low gear", "Too low terrain - too low flaps", "Too low terrain" |
| Mode 5 | excessive glideslope deviation | "Glideslope", "Glideslope" x2 |
| Mode 6 | altitude callouts | "500", "Approaching minimums", "Minimums" x2, "200" |
| bank angle callouts | "Bank angle" x2 |
Display
| solid yellow | 60s from impact |
| solid red | 30s from impact |
| high density red dots | terrain more than 2,000' above aircraft |
| high density yellow dots | terrain 1,000' - 2,000' above aircraft |
| low density yellow dots | terrain between 500' (250' with gear down) below - 1,000' above aircraft |
| high density green dots | terrain between 1,000' below aircraft to low density yellow band |
| low density green dots | terrain between 2,000' below - 1,000' below aircraft |
| low density cyan dots | terrain at 0' amsl |
Categories: Embraer 170/190 | Flight Instruments/Comm/Nav/FMS | Warning System