Unit 1 Flashcards
Translates air pressure into height above sea level and is not a good indicator of aircraft altitude when flying over land
Aneroid altimeter
This uses transmitted radio waves to measure aircraft height above the earths terrain
Radar altimeter
Formula used for radar altimeter
Distance = Time x Constant
What is the frequency range of CARA
4.3 GHz +/- 50 MHz
Ground speed of CARA
1800 knotts
Maneuver angle for fixed wing at 50,000 feet and 5000 feet
+/- 30° at 50,000 ft
+/- 60° at 5000 ft
Maneuver angle for rotary wing at 50,000 feet and 5000 feet
+/- 10° at 50,000 ft
+/- 30° at 5000 ft
Power requirement of CARA
28 VDC
26 VAC at interface adapter
What are the components of the Major component group #1
Receiver transmitter and height indicator
What are the additional components group #2
Antennas, interface adapter, cable adapter, mounting adapter, voice warning generator
What component of the CARA is responsible for generating the transmitted frequency and processing the reflective signal representing the terrain below
Receiver/transmitter RT
What provides analog and digital data for display on the CARA
Receiver/transmitter RT
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
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
What component of the CARA contains all the operating controls for the system/circuitry
CARA height indicator
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 outWhat 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
