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AIRFRAME 11

Communication & Navigation Systems

QuestionAnswer
What are the three basic autopilot components? Sensing elements(Gyros), Output elements(Servos), Command elements(Flight controller), Computing elements(Computer & Amplifier)
What are sensing elements of an autopilot system? A directional gyro, turn-and-bank gyro, attitude gyro, and altitude control
What are the actuating (output) elements of an autopilot system? Servos that operate the control surfaces
What is the most common communication system in use? Very high frequency (VHF) system
How often does the ATC transponder require certification? Every 24 calendar months
What are the components of a typical airborne VOR system? A receiver, visual indicator, frequency selector, antennas, and power supply
What are two antennas or a single multi-element antenna usually required for an ILS system? One for the localizer, and one for the glide slope recievers
What information does a glide slope radio beam provide? Vertical guidance for correct angle of descent
What is a DME? Distance measuring equipment
What is VOR equipment used for? Navigation
Where should DME antennas be located? On the lower surface of the aircraft fuselage, centerline
What is an ADF? An automatic direction finder
What powers an emergency locator transmitter (ELT) ? A self-contained battery
What is one method used to monitor the output signal during an ELT test? A VHF communications receiver turned to 121.5 MHz
How may the determination be made to replace or recharge the batters in an ELT even though the set operates? The expiration date for replacing or for recharging is marked on the outside of the transmitter and entered in the aircraft maintenance record
How does bonding help reduce radio interference? By providing a low-impedance ground return
What time of day should you perform the maintenance tests of an installed ELT? The test should be conducted during the first 5 minutes after the hour; at any other time they should be coordinated with the nearest Control Towers or Flight Service Station
Created by: Chisum
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