Communications, Light Signals, and Runway Lighting Sys

(Refer to Figure 30) What kind of antenna is this?

A lightning detector system antenna

What characteristics of the installation vertical stabilizer should be evaluated?

Flutter and vibration.

(Refer to Figure 23.) What is this antenna used for?

This is an altitude encoder used with transponders.

When installing coaxial cable, it should be secured firmly along its entire length

at two-foot intervals.

How may the battery replacement date be verified for an emergency locator transmitter (ELT)?

By observing the battery replacement date marked on the outside of the transmitter

A fully integrated autopilot controls the aircraft around how many axes?

Three

The purpose of a glideslope system is to

assist the pilot in making a correct angle of descent to the runway.

Part of the ADF system used on aircraft includes

sense and loop antennas.

(Refer to Figure 31.) What kind of antenna is this?

A marker beacon receiver antenna.

On modern large aircraft, what electronic device typically monitors flight parameters and performs autopilot functions?

Flight management computer.

When flags such as NAV, HDG, or GS are displayed on an HSI, the indication is

that function is inoperative.

(Refer to Figure 24.) What kind of antenna is this?

A dipole antenna.

Doublers are used when antennas are installed to

reinstate the structural strength of the aircraft skin.

The purpose of a localizer is to

align the airplane with the center of the runway.

One antenna can be used for the radio range and standard broadcast bands in light aircraft because the

two ranges are close together.

(Refer to Figure 16.) Which of the antennas shown is a typical DME antenna?

1

What is the operating principle of the sensing device used in an autopilot system?

The relative motion between a gyro and its supporting system.

In general, the purpose of an aircraft transponder is to

receive an interrogation signal from a ground station and automatically send a reply back.

(Refer to Figure 22.) What kind of antenna is this?

This is a loop and sense antenna.

A DME antenna should be installed on the aircraft in a position that will

not be blanked out by the wing when the aircraft is banked.

What will occur if an aircraft attitude is changed by its autopilot system in order to correct for an error and the involved control surfaces are returned to streamline by the time the aircraft has reached its correct position?

Normal operation.

When must the radio station license be displayed in an aircraft equipped with a two-way radio?

When the aircraft is operated outside the United States.

When testing an emergency locator transmitter (ELT), a 50-ohm dummy load

is connected in place of the antenna to prevent the signal from being radiated into space.

In the landing configuration GPWS typically monitors the radio (radar) altimeter, air data computer, instrument landing system, and

landing gear and flap positions.

After an automatic direction finding antenna has been installed, the

loop must be calibrated.

(Refer to Figure 26.) Where is the strongest signal for this antenna?

Above the antenna.

An emergency locator transmitter (ELT) battery must be capable of furnishing power for signal transmission for at least

48 hours

Which of the following provides manual maneuverability of the aircraft while the autopilot is engaged?

Flight controller.

When testing a 406 MHz emergency locator transmitter (ELT),

care must be taken as the unit could send an emergency signal, activating search and rescue (SAR) agencies.

In an autopilot, which signal nullifies the input signal to the ailerons?

Follow-up signal.

Static dischargers help eliminate radio interference by dissipating static electricity into the atmosphere at

low current levels.

The preferred location of an ELT is

as far aft as possible but forward of the empennage.

What is the main purpose of a servo in an autopilot system?

Move the control surface as commanded.

(Refer to Figure 34.) What kind of antenna is this?

A VOR/glide slope antenna.

(Refer to Figure 15.) What is the approximate drag load on an antenna with a frontal area of .137 square feet installed on an aircraft with a speed of 275 mph?

3.387 pounds.

What component is the sensing device in an electromechanical autopilot system?

Gyro

(Refer to Figure 33) What kind of antenna is this?

A VOR/glide slope antenna.

The preferred location of a VOR antenna on light aircraft is on

top of the cabin with the apex of the V pointing forward.

When an antenna is installed, it should be fastened

so that loads imposed are transmitted to the aircraft structure.

What component of an autopilot system applies torque to the control surfaces of an aircraft?

Servo

Which channel of an autopilot detects changes in pitch attitude of an aircraft?

Elevator

The addition of avionics and associated antenna systems forward of the CG limit will affect

empty weight and useful load.

When installing a DME antenna, it should be aligned with the

centerline on the airplane.

(Refer to Figure 25) What kind of antenna is this?

A canted antenna.

Which of the following is a two-way text communication link between and airliner in flight and the airline's main ground facilities?

Aircraft Communication Addressing & Reporting System (ACARS).

(Refer to Figure 29) What kind of antenna is this?

A VOR and localizer antenna.

(Refer to Figure 15.) What is the approximate drag load on an antenna with a frontal area of .125 square feet installed on an aircraft with a speed of 225 mph?

2.069 Pounds

(Refer to Figure 32.) What kind of antenna is this?

A radar beacon transponder antenna.

What is the primary purpose of an autopilot?

To relieve the pilot of control of the aircraft during long periods of flight.

When would a U.S. resident NOT be required to hold a Federal Communications Commission (FCC) Restricted Radio Telephone Operator Permit to operate two-way aircraft VHF radio equipment?

When flying or communicating within the United States.

How may the operation of an installed emergency locator transmitter (ELT) be verified during aircraft inspection?

By tuning a communications receiver to the civil emergency frequency and activating the ELT momentarily within five minutes after the hour.

(Refer to Figure 27.) What kind of antenna is this?

A radar beacon transponder antenna.

When must the emergency locator transmitter (ELT) battery be replaced (other than reading the replacement date)?

When the transmitter has been in use for more than one cumulative hour.

(Refer to Figure 28) What kind of antenna is this?

An ELT antenna.

A radar altimeter indicates

altitude above ground level.

When operationally checking an autopilot system on the ground, after the aircraft's main power has been switched on, the autopilot should be engaged

only after the gyros come up to speed and the amplifier warms up.

(Refer to Figure 16.) Which of the antennas shown is a typical glideslope antenna?

2

When bending coaxial cable, the bend radius should be at least

10 times the diameter of the cable.

How should a coaxial cable be routed?

As directly as possible.

How much clearance from the seat bottom is required when installing radio equipment under a seat?

1 inch with the seat occupied and subjected to maximum downward seat spring deflection.

In which control element of an autopilot system is an attitude indicator?

Sensing

An emergency locator transmitter (ELT) is normally activated by an inertial switch or equivalent mechanism if subjected to a force of a prescribed intensity and duration. It must activate when the force is applied.

parallel to the longitudinal axis of the aircraft.

Installed radio equipment is protected from damage due to jolts and vibration by

shock mounts.

Radio equipment is bonded to the aircraft in order to

provide a low-impedance ground and minimize radio interference from static electrical charges.

VHF radio signals are commonly used in

both VOR navigation and ATC communications.

The elevator channel of an autopilot controls the aircraft about which axis of rotation?

lateral

Aircraft antenna must be grounded to the

Airframe

A gasket or sealant is used between the antenna mast and fuselage skin

to prevent the entry of moisture.

A radar altimeter determines altitude by

transmitting a signal and receiving back a reflected signal.