Aircraft Computer Systems

What is the primary function of the Central Maintenance Computer (CMC)?

To monitor and correlate aircraft system faults (correct)
To manage aircraft communication systems
To control aircraft navigation systems
To display aircraft performance data to the pilots

What type of warnings are transmitted to the CMC?

Only critical warnings from the aircraft engines
Only primary and independent warnings or maintenance status type warnings (correct)
All warnings and cautions from the aircraft systems
All warnings and cautions from the ECAM or EICAS systems

What is the purpose of the CMC's memory?

To store aircraft navigation data
To store aircraft communication data
To store aircraft performance data
To store maintenance data for retrieval (correct)

What type of report is generated by the CMC after each flight?

Current Flight Report (A) Signup and view all the answers

What is included in the data stored by the CMC?

Aircraft heading, date, flight number, city pair, start time, and A/C identification (A) Signup and view all the answers

How many previous flight legs are stored in the CMC's Previous Flight Report (PFR)?

63 previous flight legs (B) Signup and view all the answers

What does the CMC update at each leg opening transition?

The previous flight report and the new leg heading (B) Signup and view all the answers

What is the purpose of having two CMCs in large modern commercial aircraft?

To provide a backup system in case of failure (C) Signup and view all the answers

What is the result of a CMC BITE failure?

A failure indication on the MCDU and printer (C) Signup and view all the answers

How can the CMC be switched in normal operation?

Through MCDU selection or a pushbutton switch (B) Signup and view all the answers

What is the primary function of the Aircraft Communication Addressing and Reporting System (ACARS)?

To transmit maintenance information from the aircraft to the destination station (D) Signup and view all the answers

What happens when the 'off' legend illuminates on the pushbutton switch?

The CMC 2 becomes the master (D) Signup and view all the answers

What is the purpose of a data loader in an aircraft?

To load and update software in the aircraft's systems (D) Signup and view all the answers

How are failure details sent to the main base in case of a CMC failure?

Through the Management Unit (MU) of the ACARS or via the Air Traffic Service Unit (ATSU) (A) Signup and view all the answers

How does the CMC integrate with other systems?

Through all of the above (D) Signup and view all the answers

What is the benefit of the ACARS system to maintenance personnel?

It enables them to begin troubleshooting and analysis before the aircraft arrives (B) Signup and view all the answers

What is the typical connection method for a data loader?

Through a data bus coupler (B) Signup and view all the answers

What is the purpose of the CMC-ACARS interface?

To integrate the CMC with the ACARS system (C) Signup and view all the answers

What is the primary function of electronic flight bags?

To replace aeronautical charts and mathematical calculations (A) Signup and view all the answers

Where are additional display units for electronic flight bags typically installed?

On side panels of the cockpit (C) Signup and view all the answers

What is the primary difference between Class 1 and Class 2 EFB systems?

The requirement for airworthiness approval (B) Signup and view all the answers

What is a characteristic of Class 1 EFB systems?

No administrative control process required before use (C) Signup and view all the answers

What is a possibility with Class 2 EFB systems?

Connection to avionics equipment during normal operations (D) Signup and view all the answers

What is a common term used to describe Class 1 EFB systems?

Portable Electronic Devices (PEDs) (C) Signup and view all the answers

What is a characteristic of a Class 3 EFB system?

It is independent and has separate components for the captain and first officer (D) Signup and view all the answers

What feature of a Class 3 EFB system allows it to display the aircraft's position on a map?

Moving-map software (D) Signup and view all the answers

What is the primary purpose of a Class 3 EFB system?

To enhance the quality of information available to the flight crew (C) Signup and view all the answers

What is an optional feature of a Class 3 EFB system?

Cabin surveillance cameras (B) Signup and view all the answers

What is the function of the Display Unit (DU) in a Class 3 EFB system?

It operates as a computer monitor and input device (B) Signup and view all the answers

How do the flight crew interact with the EFB system?

Through a combination of buttons, touch-screen, and Cursor Control Device (D) Signup and view all the answers