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AIRFRAME
J IRCRAFT AVIONICS SYSTEMS
| Question | Answer |
|---|---|
| What are the basic components of a radio communication system? | A microphone, transmitter, transmitting and receiving antennas, receiver, and speaker or headphones. |
| What frequency range is used by most modern voice communications systems? | The VHF (Very High Frequency) band (118.0 to 136.975 MHz). |
| What does the term "ADF" stand for | Airborne Direction Finding (Finder) |
| What is the function of VOR equipment? | Navigation |
| Name the components of a typical airborne VOR navigation system. | A receiver, antennas, frequency selector and a visual display indicator. |
| What does DME stand for? | Distance Measuring Equipment |
| At what interval must an ATC transponder system be certified? | Every 24 calendar months. |
| Why are two antennas usually required for an ILS system? | The localizer and glideslope signals are transmitted on different frequencies. |
| What information does the glideslope beam provide? | Vertical guidance to enable the aircraft to maintain the correct descent angle. |
| What is the power source for an ELT (Emergency Locator Transmitter)? | - An internal battery. |
| Describe one method of monitoring the signal output during an ELT test? | Tune a communications receiver to 121.5 MHz. |
| How would you determine if the batteries in an ELT are due for recharge or replacement? | By looking for an expiration date for recharge or replacement on the battery and/ or in the aircraft maintenance records. |
| At what time(s) is a test of an installed ELT permitted? | During the first 5 minutes after the hour and for no more than 3 sweeps. |
| Where on the aircraft would you expect to find a DME antenna? | Generally on the bottom of the fuselage in a location that isn't blocked by the wing during turns. |
| Describe the shape and location of a transponder antenna. | Either a short blade or a short wire with a ball end located on the bottom of the fuselage. |
| Name the basic components of an autopilot system. | Gyros, servos, a controller, and an amplifier or computer. |
| What are the sensing elements of an autopilot system? | Attitude, directional, and turning gyros, and an altitude sensor. |
| What is the function of the servos in an autopilot system? | The servos actuate the flight controls. |
| What is the purpose of a bonding jumper from a radio shock mount to the airframe | To provide a low-impedance ground return. |
| Describe the procedure used to route coaxial cable from an antenna to a receiver. | The cable should be supported every 2 feet, bends should be 10 times the cable diameter, and it should be routed separately from other wires. |
Created by:
S_A_J
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