11.5 Avionic Systems Flashcards by Meg Bazeley

What makes up the basic T

Altimeter
Airspeed indicator
Artificial horizon
Heading/compass

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What does the FDR do?

Store flight data from flights from last 25 hours
(Flight data recorder)

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What are the three emergency frequency’s

121.5mhz
243mhz
406mhz

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What component is used to measure the motion of the aircraft on its longitudinal axes?

Accelerometers

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How many accelerometers are required on an aircraft?

3
One per axis

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What the identification code for emergency

7700

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What’s the identification code for hijacking

7500

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What’s the identification code for radio failure

7600

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What does a white band mean on an airspeed indicator?

Full flap operating range

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There is two temperature indicator, SAT (static air temperature) and TAT (total air temperature) which one is higher during flight?

TAT is higher during flight due to ram rise.

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What is mode S and it’s purpose ?

Helps ATC control increasing levels of air traffic.

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HF are reflected by what?

Bounce of the Ionosphere

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How many degrees of freedom does a vertical Gyro have?

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To calculate the height above the ground we use what?

Radio altimeter

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What assists the pilot to fly manually

Flight director

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How many VHF systems are there on an aircraft?

2 for COMMS and 1 for ACARS

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What antenna is installed inside the leading edge of the vertical stabilisers

HF antenna

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What are the three ILS Beacons

Localiser
Marker beacon
Glidestop

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Vertical airspeed is part of the Basic T. TRUE OR FALSE

FALSE

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What number code on TCAS is for an emergency

7700

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What is the input to the vertical speed indicator

Static pressure

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What is the DME frequency

Same as VHF frequency

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Yaw damper deflects in ——— direction, relative to yaw motion

Opposite

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Airspeed, attitude, altitude and heading make up what?

Basic T

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What’s use to connect headphone/microphone to COMMS system?

Audio selector panel

What does the Mode S transponder tell you?

Aircraft position Flight track Altitude Identification number

Can TCAS detect another aircraft if that aircraft does not have TCAS( transponder)

No, the TCAS system will not be able to see that aircraft

At what height does the radio altimeter measure?

Below 2500ft

What’s does the computer system FMS (flight management system) do?

Reduces pilot workload and makes a safer and more economic flight

How many antennas does the ADF system have?

2 Loop and sense

Why does a ADF ( automatic direction finding) system have 2 antennas

1 Loop and 1 sense Calculate the correct location

How does VOR work

Much like a lighthouse A rotating beam and a flash in all directions Then light passes through magnetic north and works out the time between all flash directions

What’s does ILS stand for

Instrument landing system

What three components does a ILS system need?

Localiser, glide slope, marker beacon

What is the decision height

The height a pilot decides if he will land or do a go around. (The minimum heigh before landing)

How does DME tuning work?

Either paired with VOR or localiser ground station automatically when select the VHF NAV frequency

What only transmits a 4 digit identification code

Mode A

What’s the audio priority

Cockpit Crew Pre recorded Music

How many VHF systems are there

What does ACARS do

Send data and communication

What does the auto pilot use

Inner and outer loop

Auto pilot also controls

Auto throttle

How can you disconnect the auto throttle

By two buttons

What gyro is used to measure the roll rate

Roll rate gyro

What happens when autopilot is engaged

Servos manage the controls

What does the pitot tube measure

Measures the total pressure which is sum of static and dynamic pressure

What is the standard static pressure at sea level

1013.25 hecto pascales

What does the airspeed indicator indicate

The forward speed of the aircraft’s

What is the job of the vertical speed indicator

Shows the pilot the rate of climb or decent in feet per minute

What is the job of the static ports

A metal plate with holes that allow outside static air pressure to enter static line, so can be measured

When would an altitude alarm system alert the pilot

When there is a deviation of more than 300ft from ATC clearance altitude

How many flight hours do FDRs hold

25 hours

When a force is applied to gyro axis, the reaction is shifted by 90 degrees what is this called

Precession

What type of gyro would be used to indicate the aircraft’s altitude?

Vertical gyro

Vertical gyros have how many degrees of freedom relative to what axis?

3 degrees of freedom on a vertical axis

Depending on the amount of gimbals what are the degrees of freedom for 0,1 and 2 gimbals?

0 gimbal = 1 degrees of freedom 1 gimbal = 2 degrees of freedom 2 gimbal = 3 degrees of freedom

What is the true North?

Reference to the geographical North Pole ( true heading)

What is the magnetic north?

Reference to the magnetic North Pole

What are the centre displays for Boeing and airbus called?

Boeing = EICAS - electronic centralised aircraft monitoring Airbus = ECAM - engine indication and crew alerting

What is EFIS (electronic flight instrument) system divided into?

. primary flight displays (PFD) . Navigation displays (NDs)

What does the navigation display?

Presents the situation of the aircraft

What are the two different types of alerts to inform flight crew about abnormal situations?

. Local . Central

Explain what a local warning is

Controlled directly from specific system, independent of central warning system (cws)

Give 3 types of local warnings in the cockpit

. Push button light . Flags . Display limit exceedance

What is the purpose of a flag?

Inform pilot that information which is normally displayed is missing

What does a white push button light mean?

System unavailable

What is the difference from a local to central warning?

Pilots do not need to be permanently monitoring the local warnings on overhead panel/ indicators

What are the two types of central warnings?

. Central warning displays . Attention getters

What does level 3/ A mean?

WARNING - red asap

What is used to measure fuel temperature?

Thermistor

What differs fuel temp indications in EICAS and ECAM?

ECAM has individual temper valve for each wing.. where as EICAS only have one tank temp indication

How many vibration sensors are there in each wing a.

What are the 2 types of accelerometers on engines?

. Electron magnetic . Piezoelectric crystal

What does VNE mean?

Speed that should never be exceeded

What does VFE mean?

Max speed with flaps extended

What does VNO mean?

Max speed for cruise speed

What does VSO mean?

Stall speed in landing config

What does VMO mean?

Max operating speed

What does VS1 mean?

Stall speed in clean configuration