Facts Flashcards
What are the 7 advantages of EIDS and EFIS over analogue instruments?
- Variable and varied
- Coloured displays
- Important data accentuated
- Temporarily unimportant data suppressed
- Fewer components needed
- All EFIS monitors same type
- Displays are interchangeable
What does a CPU’s programming enable it to do?
- Arrive at the desired computations for output, input and storage. -Manipulate data in memory
- Perform mathematical and logical functions
What type of memory is used when memory values don’t change? (E.g. dedicated systems)
ROM
What type of memory is know as ‘volatile memory’?
RAM
Which type of memory stores program steps and constant values?
ROM
What makes it so content cannot usually be changed after manufacture of ROM?
A special masking technique adopted during programming
Which type of memory stores data that changes during computer operation?
RAM
What does PROM allow that ROM does not?
Existing programming to be altered
How is data erased from the EPROM?
Exposing to ultraviolet light
What is the advantage of EAROM over EPROM?
Each individual element of the memory can be changed without erasing all other elements
What is the Inertial Reference System (IRS) an example of?
A Reference computer
What 4 units utilise the IRS?
- Auto throttle computer
- Flight control computers
- Pilot’s horizon situation indicators
- Flight management computers
What system is Laser gyro and acceleration based?
Inertial reference system (IRS)
What is an example of an Informational computer?
Engine Indication and Crew Alerting System (EICAS)
What type of computer collects, processes and formats data from various places for display?
Informational computer
What do Storage/Monitor computers do very little of?
Signal processing
What do Storage/Monitor computers do mainly?
Monitor and store data for later retrieval (to be used by other computers or crews)
What does the data stored by EICAS pertain to?
Engine abnormalities during flight
What is an example of a controlling computer?
Flap/Slat Electronic Unit (FSEU)
What are 3 of the units that the FSEU takes input from
- Flap lever
- Flap/Slat position Module
- Proximity Switch electronics unit
When will the FSEU allow flap extension?
When airspeed is within allowable parameters
What type of computer displays information and manipulates it depending on operator input?
Interactive computer?
What is an example of an interactive computer and what do the crew use to interface with it?
Flight Management Computer (FMC)
Control Display Unit (CDU)
What does a FMC calculate?
Optimal cost profiles for climb, cruise and decent
