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M5 > 5.1 Electronic instrument systems > Flashcards

5.1 Electronic instrument systems Flashcards

1
Q

the earleist Air speed indicators consisted of what

A

flexible bamboo strip or metal spring with a paddle on the end. (as speed increased airflow pushed paddle rearwards)

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2
Q

what period saw major advancements in instrumentation and allowed pilots to fly and night and in all weather conditions

A

WW1 and the first air mail delivery in the 1920s

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3
Q

instrumentation in an aircraft provides what

A

information about its position and speed

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4
Q

the front instrument panel contains what

A

all instruments needed to fly the aircraft safely and is positioned directly in the pilots eyeline

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5
Q

Basic six arrangement (instruments) create a “picture “ of an aircrafts flight condition what are they

A
  • Airspeed indicator
  • Gyro horizon indicator, now called the attitude director indicator (ADI)
  • Altimeter
  • turn & bank indicator or coordinator
  • Direction indicator now called Horizon situation indicator (HSI)
  • Vertical speed indicator
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6
Q

all aircraft instrument layouts conform to standards set by who

A

ICAO

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7
Q

Basic T arrangement makes dials easy to read and help pilot establish aircrafts attitude and position

A

.

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8
Q

four key indicators in the T arrangement are

A

Airspeed indicator
Attitude director indicator
altimeter
Horizontal situation indicator

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9
Q

Electronic instrument systems (EIS) have many advantages over their analoue predecessors including

A

exchange of images between units in the case of a display failure. removal of “clutter” on screen.

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10
Q

some other advantages of EIS over analogue include

A
  • coloured displays
  • fewer components are needed
  • all display units for EIS are the same type.
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11
Q

there are many different EIS, including

A
  • Electronic flight instrument system (EFIS)
  • Engine indicating and crew alerting system (EICAS)
  • Electronic centralised aircraft monitoring (ECAM)
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12
Q

on a cockpit control panel, pushbutton commands are processor controlled.
-selected data is transmitted via data buses to display systems.

A

.

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13
Q

calculations in the system are made by what

A

CPU (central processing unit)

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14
Q

electronic units are interconnected by what

A

digital data buses

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15
Q

required data is transmitted digitally by ARINC 429 buses :

A
  • via display data buses to CPU- controlled CRT or LCD
  • via digital data buses too a printer for a hard-copy printout
  • in digital form to a radio transmitter, which sends data, which sends data to a ground receiver
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16
Q

reading the indication in bright sunlight used to be more difficult on EIDS monitors than on analogue indicators. until what solution

A

brighter, more modern displays

17
Q

the EFIS displays are controlled by what panels

A

EFIS control panels and lighting/loudspeaker control panels

18
Q

(GGs) graphics generators transmit video signals to what

A

display units (DUs)

19
Q

(SSPs) source select panels and centre display control panel supply what

A

additional controls for the display system

20
Q

a modern Electronic attitude and direction indicator (EADI) displays

A
  • pitch and roll info
  • ground speed
  • airspeed
  • flight director information
  • glide slope and localiser deviation
  • numerous warning and status messages,
21
Q

the numerous warning and status messages dispayed on EADI include

A
  • pitch and roll mode
  • nav aid selected
  • radio altitude
  • altitude alert
  • decision height
22
Q

EHSI stands for

A

Electronic horizontal situation indicator

23
Q

a modern EHSI presents a selectable and dynamic colour of the aircraft’s position and heading in relation to the nav aids around it

A

.

24
Q

EHSI items include

A
  • magnetic display
  • radio steering commands for VOR or ILS
  • way points, airports and nav aids
  • distance to go
  • ILS steering info
25
Q

EHSI can be switched by pilot to display either…

A

a full compass rose or a portion of the compass rose ahead of the aircraft. commonly called the ARC or sector display

26
Q

if an EHSI or EADI fails what happpens

A

a composite mode on the remaining display shows combined elements of both displays.

27
Q

ECAM is a system used by who
(ELECTRONIC CENTRALISED AIRCRAFT MONITOR)

A

Airbus
Engine parameters need to be displayed continuously
Top display shows system status messages, warnings and corrective actions
Lower screen shows pictorial diagrams of systems

28
Q

EICAS is a system which is used by who

(ENGINE INDICATING AND CREW ALERTING SYSTEM)

A

Boeing
The lower screen is usually blank during normal flights
And upper screen displays primary engine parameters

29
Q

In both EICAS and ECAM warnings are accompanied by

A

Master warning lights.

The two systems are becoming more alike on modern aircraft

30
Q

Older aircraft used CRT for their displays and have now been supplanted by

A

LCD as they are brighter

31
Q

LCD have serval advantages over CRT including

A

More robust
Produce far less heat
Require lower and simpler power supply

32
Q

All EIS have brightness set initially by the pilot then they adjust automatically by

A

Using photocells, to adapt to the ambient light levels in the cockpit

33
Q

An MCDU Multi- function control display unit are used as

A

primarily as an interface between the pilot and the flight management system

They also act as interface to the on-board maintenance system

34
Q

In case of total failure of the EIS what is implemented

A

A standby artificial horizon, airspeed indicator and altimeter are fitted in view of both pilots

35
Q

What does EIS use for its displays

A

Cathode Ray tube (CRT) and liquid crystal display (LCD)

36
Q

EIS allows manual transfer of displays

A

PFD with ND
Secondary ECAM with ND

M5 (12 decks)

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