Warning Systems

Question 1

What are considered GPWS “radio altitude based alerts”?

Answer 1

-Excessive descent rate
-excessive terrain closure rate
-altitude loss after takeoff or go around
-unsafe terrain clearance when not in the landing configuration
-excessive deviation below an ILS glideslide

Question 2

How does the (E) GPWS provide “look ahead terrain alerts”?

Answer 2

Using an internal world-wide terrain database

Question 3

What condition will inhibit a terrain alert?

Answer 3

An actual windshear warning

Question 4

Can terrain and weather radar show together on a display?

Answer 4

No.

Question 5

What conditions inhibit TCAS alerts?

Answer 5

GPWS and windshear warnings

Question 6

What must an aircraft be equipped with to allow RAs?

Answer 6

Mode C transponder

Question 7

Why should TCAS be placed in TA ONLY when performance is limited, such as with an inop engine?

Answer 7

To prevent from receiving RAs beyond the aircraft’s capabilities

Question 8

GPWS windshear alerts are enabled below what altitude?

Answer 8

1,500 ft RA. GPWS Windshear detection begins at rotation

Question 9

When does weather radar automatically begin scanning for windshear?

Answer 9

-700 when thrust levers are set for takeoff, even if engine is off or IRS not aligned or in flight below 2300 RA (predictive windshear alerts are issued below 1200 RA)

-800: when thrust levers are set for takeoff or in flight below 1800 ft RA (predictive windshear alerts are issued below 1200 RA)

MAX- thrust levers set for takeoff, even if engine is off or IRS not aligned or in flight below 1800 RA (predictive windshear alerts are issued below 1200 RA)

Question 10

When are predictive windshear cautions inhibited?

Answer 10

80 knots and 400 RA

Question 11

When are predictive windshear warnings inhibited?

Answer 11

between 100 kts and 50 ft RA