Warning Systems Flashcards
What are the four TCAS threat levels?
- Other traffic
- Proximate traffic (within 6 nm, 1200’)
- TA (within 25-45 sec)
- RA (within 20-30 sec)
The coverage does the TCAS N position provide?
2700’ above, 2700’ below
What coverage does the TCAS ABV position provide?
7000’ above, 2700 below
What coverage does the TCAS BLW position provide?
2700’ above, 7000’ below
What inputs calculate GPWS immediate alerts?
- RA
- Baro altitude
- ADIRS
- GS deviation
- Airplane configuration
What are the immediate alerts GPWS provides?
- Altitude loss after takeoff or go around
- Excessive descent rate
- Excessive terrain closure rate
- Unsafe terrain clearance when not in the landing configuration
- Excessive deviation below ILS GS
- Excessive bank angle
- Minimums voice annunciation
- Windshear
- Altitude voice annunciations during approach
When will the “CAUTION TERRAIN” voice alert sound?
When the system calculates that the aircraft will impact terrain within 40-60 seconds
What happens when the GPWS calculates that the aircraft will impact terrain within 20-30 seconds?
- The dotted red terrain becomes solid red
- Ared TERRAIN message displays on the ND
- A red PULL UP displays on both PFDs
- The master warning lights illuminate
- A voice alert sounds: “TERRAIN, TERRAIN, PULL UP”
When does windshear detection begin?
At rotation to below 1500’ RA
PWS caution messages are inhibited from?
80 kts until 400’ RA. However, windshear image is still available on the ND
When is the GPWS activate the bank angle aural alert?
When the aircraft bank angle exceeds 35, 40, or 45 degrees
How many events can be stored in the EICAS EVENT RCD memory?
5
What are the 4 types of EICAS messages?
- Alert
- Communication
- Memo
- STATUS
What are the 3 priorities of the EICAS alert messages?
- Warnings
- Cautions
- Advisories
