Flight Control Computer Systems Quiz

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Questions and Answers

What is the primary function of the PRIM computers on the A330?

Provide navigation data to the flight crew

Control normal, alternate, and direct control laws (correct)

Perform redundancy checks on systems

Manage cabin pressure and temperature

In normal operation, which PRIM computer is designated as the master?

P1 (correct)

What happens if the master PRIM computer (P1) fails?

P2 takes over as the new master (correct)

P3 will replace P1 regardless of its status

All SEC computers will become active

The flight crew must take manual control

What role do the SEC computers play in the flight control system?

Control direct laws and provide redundancy for yaw damping Signup and view all the answers

What occurs when all PRIM computers fail on the A330?

One SEC computer can take complete control Signup and view all the answers

What happens to the master computer when the green hydraulic system is lost?

P2 takes over as the master computer. Signup and view all the answers

Which computer assumes control when P1 is unable to function?

P2 replaces P1 as the master computer. Signup and view all the answers

When P1 fails, what is expected from P2 in the system?

P2 takes over the responsibilities of P1. Signup and view all the answers

What do the FCDCs do with the data acquired from the PRIMs and SECs?

They send it to the EIS and CMC. Signup and view all the answers

What does the message 'RUD TRV LIM' indicate when displayed on the INOP SYS ECAM status page?

One FCDC does not detect its ground condition. Signup and view all the answers

What causes the 'RUD TRV LIM' message to disappear on the INOP SYS ECAM status page?

The rudder control is pressurized by hydraulic. Signup and view all the answers

What situation triggers the activation of the Backup Control Module (BCM) computer? 330-300

Total electrical failure Signup and view all the answers

What is the main function of the BCM's independent unit during its activation? 330-300

Provide yaw damping and rudder command Signup and view all the answers

Which hydraulic system supplies the Backup Power Supply (BPS) for the BCM? 330-300

B or Y hydraulic system Signup and view all the answers

What type of sensors does the BCM include for its operation? 330-300

Gyrometers and pedal deflection sensors Signup and view all the answers

What is the consequence of BCM activation regarding turn coordination? 330 -300

Turn coordination is disabled Signup and view all the answers

Study Notes

3 PRIM Computers

Each Flight Control Primary Computer (FCPC) handles normal, alternate, and direct control laws
Responsible for speedbrake and ground spoiler control
Computes protection speed
Manages rudder travel limit

2 SEC Computers

Flight Control Secondary Computers (FCSC) control direct control laws, including yaw damper function
Controls rudder trim and rudder travel limit

Computer Operations

One computer can manage all aircraft functions, including landing
In normal operation, one PRIM computer is designated the master (P1)
P1 processes orders and sends them to other computers (P2, P3, S1, S2) for execution
If a computer fails, another takes over its tasks (except for spoiler control)
If the master computer fails, another becomes the new master (P2 or P3)
When the green hydraulic system fails, P2 becomes the new master

Additional Notes

If all PRIM computers fail, each SEC becomes its own master
A single SEC can control the entire aircraft in direct law

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Description

Test your knowledge on the operation and management of primary and secondary flight control computers. This quiz covers the functions, responsibilities, and failover processes of FCPC and FCSC systems in aircraft. Enhance your understanding of aircraft control laws and computer hierarchy.