TAWS/GCAS/RADAR Flashcards

1
Q

Which are the only 2 GCAS warnings that can be inhibited?

A

GLIDESLOPE

TOO LOW FLAPS

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2
Q

What are the 3 states of GCAS operation?

A

Power up
Ground
Flight

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3
Q

When is the aircraft takeoff configuration checked?

A

WOW and any 3 power levers are above 40 degrees

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4
Q

What are the 2 GCAS mission modes?

A

Normal

Tactical

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5
Q

What’s the difference between normal and tactical mode for the GCAS?

A

Normal - based on normal flight profiles / optimized to detect CFIT and unsafe flight conditions

Tactical - allow more aggressive, tactically oriented flight

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6
Q

How many different GCAS modes of operation are there?

A

8

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7
Q

Describe Mode 1 - Excessive Descent Rate

A

Whenever ac between 30 and 2450 AGL
Inner and outer envelope provided (both altered when in tactical and gear down / inhibited when in tactical and gear up)

Outer envelope - SINK RATE
Inner envelope - PULL UP

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8
Q

Describe Mode 2 - Excessive Terrain Closure Rate

A

Based on RADALT and how quickly Radar altitude is decreasing

Envelope adjusted based on configuration and speed

If penetrated - TERRAIN TERRAIN
if not exited and if flaps and gear are up and not in tactical mode - WHOOP WHOOP PULL UP

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9
Q

Describe Mode 3 - Excessive Altitude Loss After Takeoff

A

30 to 2450 AGL - DONT SINK

disabled if both gear and flaps are down
disabled if in tactical mode and above 200 ft

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10
Q

Describe Mode 4 - Unsafe Terrain Clearance

A

Mode 4A/B
TOO LOW GEAR - airspeed below 178 and below 400 AGL
TOO LOW TERRAIN
Tactical - lowered to 150 AGL

Mode 4C

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