Unit 1 Flashcards by Matthew Delano

Translates air pressure into height above sea level and is not a good indicator of aircraft altitude when flying over land

Aneroid altimeter

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This uses transmitted radio waves to measure aircraft height above the earths terrain

Radar altimeter

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Formula used for radar altimeter

Distance = Time x Constant

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What is the frequency range of CARA

4.3 GHz +/- 50 MHz

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Ground speed of CARA

1800 knotts

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Maneuver angle for fixed wing at 50,000 feet and 5000 feet

+/- 30° at 50,000 ft

+/- 60° at 5000 ft

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Maneuver angle for rotary wing at 50,000 feet and 5000 feet

+/- 10° at 50,000 ft

+/- 30° at 5000 ft

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Power requirement of CARA

28 VDC

26 VAC at interface adapter

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What are the components of the Major component group #1

Receiver transmitter and height indicator

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What are the additional components group #2

Antennas, interface adapter, cable adapter, mounting adapter, voice warning generator

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What component of the CARA is responsible for generating the transmitted frequency and processing the reflective signal representing the terrain below

Receiver/transmitter RT

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What provides analog and digital data for display on the CARA

Receiver/transmitter RT

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What is used to compensate for height of antennas above ground and length of cables from the RT to the antennas and is installed in the RT

Aircraft installation delay AID

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What component on the CARA displays both analog and digital info provided from the RT and supplies a warning signal when altitude falls below

CARA Height Indicator

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What component of the CARA contains all the operating controls for the system/circuitry

CARA height indicator

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What range is the analog and digital on the CARA height indicator

Analog : 0-5000 ft

Digital : 0-50,000 ft

What gives altitude warning in the CARA height indicator

VALI setting indicator

Radiates/receives

Antennas

What converts analog altitude data for used by other aircraft systems

Interface adapter

What contains the circuitry that provides for isolation to the SRU level within the RT unit in the CARA

BIT processor

Which self test is activated on power on and is undetectable
Occurs 2 to 3 times per second

Automatic self test AST

What self test is a manual check of the RTN antennas and is a two-step process

Manual push to test PTT

What is the two-step process in the manual push to test

Step 1 : Analog pointer = 500 ft
              Digital display = 88888
              R/T Lamp lit for 1.5 secs
Step 2 : Analog pointer = 300 ft
              Digital display = 300 ft
              R/T Lamp lit is out

What self test is during back shop and is activated by doing PTT with a jumper in the maintenance test harness

Maintenance built in test MBIT

What will happen when there is a failure indication

“FAIL” on digital display, RT status light will be illuminated, analog pointer will indicate below zero

System Integration on CARA uses what?

Analog altitude, low altitude warning, radar altimeter valid signal

What system is a passive system and warns of impending danger to avoid ground impact it has audio and visual warning

Ground proximity warning systems GPWS

What outputs does GPWS use

Analog altitude and low altitude warning

What is an active system and digital system that integrates with autopilot to avoid impact? This initiates fly up commands and executed windshear functions

Ground collision avoidance system GCAS

What outputs does the GCAS utilize

Analog altitude, low altitude warning, radar altimeter valid signal

What integrates flight instruments, navigation systems, warning and caution information, and other aircraft systems

Control display system CDS

What is used for pilot relief during flight and derives altitude right information

Automatic flight control systems AFCS

What outputs does the CDS utilize

Analog altitude, low altitude warning, and radar altimeter valid signals

What outputs does the AFCS utilize

Analog altitude and radar altimeter valid signals