Systems 2

Question 1

The T-6A can navigate via VOR and to fly VOR or ILS approaches. A remotely mounted navigation receiver in the ______ processes signals provided by _____ located on the ______ and on the bottom of the ______.

Answer 1

right avionics bay
antennas
vertical fin
fuselage

Question 2

What physical restrictions are VOR stations subject to? What can vary the range of these signals?

Answer 2

Line-of-sight restriction
Range varies with altitude

Question 3

VOR stations transmit beams, called _____, in every direction. The _____ in the T-6A is used to detect these signals and display the radial on which the aircraft is located, and is displayed on the _______ (EHSI).

Answer 3

radials
VOR receiver
electronic horizontal situation indicator

Question 4

How accurate are a VOR station’s broadcasts?

Answer 4

VOR broadcasts are accurate to a tolerance of one full degree, so 360 radials are available

Question 5

The 000º radial of each station is oriented to?

Answer 5

Magnetic north

Question 6

The ILS system is composed of three distinct signals, which guide the aircraft to the runway. What are they?

Answer 6

Localizer: provides course guidance to the runway centerline
Glideslope: provides vertical guidance maintains approach angle
Marker beacon: provides indications of progress along the path

Question 7

What does DME equipment do?

Answer 7

DME equipment in the T-6A sends paired signal pulses on radio frequencies. These pulses are received by a ground station and then retransmitted to the aircraft. The DME system measures the time required for this round trip and calculates a slant range distance in nautical miles from the aircraft to the ground station.

Question 8

What is DME range measuring?

Answer 8

Slant Range (NOT ground distance)

Question 9

What displays make up the EFIS (Electronic Flight Instrument System)?

Answer 9

The top display is the EADI (Electronic Attitude Display Indicator) and the bottom display is the EHSI (Electronic Horizontal Situation Indicator)

Question 10

Both the EADI and EHSI receive their information from what?

Answer 10

the AHRS (Attitude Heading and Reference System)

Question 11

What is the AHRS?

Answer 11

The AHRS (Attitude Heading and Reference System) is an all-attitude inertial sensor system, which provides aircraft attitude, heading, and flight dynamics information to the aircraft systems and displays.

Question 12

The primary switch on the AHRS controller is the mode control switch. Which position should the switch be for the AHRS to provide the most accurate heading information to the EHSI?

Answer 12

SLVD (slaved)

Question 13

The EHSI basically becomes a compass card with inaccurate
heading information if switched to?

Answer 13

DG (Directional Gyro)
This position could be used in an emergency situation where basic heading information is required.

Question 14

Primary air data information is provided by the ADS (Air Data System), consisting of three Electronic Instrument Displays (EIDs) in each cockpit. Name them.

Answer 14

Airspeed Indicator
Altimeter
Vertical Speed Indicator

Question 15

Where do EIDs (Electronic Instrument Displays) receive sensor data from?

Answer 15

the Air Data Computer (ADC)

Question 16

What are the standby flight instruments? (5)

Answer 16

mechanical standby airspeed, attitude, altitude, and turn and bank indicators, and a magnetic compass

Question 17

How many pitot static systems are there?

Answer 17

Two independent pitot static systems

Question 18

Where is the primary pitot probe located?

Answer 18

Right wingtip

Question 19

Does the ADC provide information corrected for temperature, position, or instrument error?

Answer 19

No

Question 20

Where do the standby instruments receive pitot pressure and static pressure from?

Answer 20

Directly from the secondary pitot probe at the left wingtip

Question 21

Where are both the primary and secondary static ports located?

Answer 21

the sides of the aft fuselage

Question 22

Power for the EHSI and EIDs is supplied through which bus?

Answer 22

Generator bus

Question 23

Power for the ADC is controlled by the _____ bus circuit breaker panel in the ____ cockpit

Answer 23

generator; front

Question 24

Power for the EADI is supplied through the ____ bus, and controlled by the ____ bus circuit breaker panel in _____ cockpit

Answer 24

battery; battery; each

Question 25

The standby instruments normally receive their power from the ____ bus. If that should fail, the standby instruments are then powered by?

Answer 25

battery bus; auxiliary battery by activating the AUX BAT switch

Question 26

How is the intensity of the backlighting controlled on the EFIS

Answer 26

A rocker type switch labeled BRT/DIM

Question 27

What does the Composite Mode Switch (CMP) do?

Answer 27

Its located on the lower left of each instrument to allow composite display on one instrument if either should fail

Question 28

In a standard rate turn, where is the pointer located on the EADI?

Answer 28

the pointer is displaced outward to the right or left scale mark

Question 29

The EFIS is designed to declutter the EADI in unusual aircraft attitudes. If the pitch angle exceeds +___º or -___º, or if the roll angle exceeds ___º, only the attitude presentation remains and all other information is removed

Answer 29

+30º -20º
roll exceeds 65º

Question 30

When the aircraft returns to a pitch orientation of less than __° up or __° down, and the bank angle is less than __°, the normal EADI presentation reappears.

Answer 30

25º up or 15º down
bank less than 60º

Question 31

The recovery chevrons appear when the pitch attitude is between ___º and ___º nose low/high

Answer 31

40º to 90º nose low or high

Question 32

In either enroute or approach mode, the EHSI has five display formats available:

Answer 32

directional gyro (DG) only, HSI compass rose, HSI map, ARC compass rose, and expanded navigation map

Question 33

In what display formats does the EHSI display a 360º rotating compass scale divided into 5 and 10º increments?

Answer 33

DG only, HSI compass rose, or HSI map formats

Question 34

How do you reset the HDG knob to the present aircraft heading?

Answer 34

Pull out on the HDG knob

Question 35

What does pulling out on the CRS knob do?

Answer 35

It resets the CRS pointer and digital course readout to a direct course to the selected NAVAID (VOR) or waypoint (GPS)