Subsection 15a Typical electronic/digital aircraft systems Flashcards
A basic IRS platform has?
3 accelerometer’s and 3 laser gyro’s
A BITE check for automatic performance and fault monitoring is carried out when?
Power up self test
A bulk erase facility in a CVR is interlocked to prevent?
Inadvertent erasure in flight
A central fault display system should be available through an easy accessible?
Multifunction control display unit
A central maintenance computer provides ground and flight monitoring and testing on?
An on board computer
A centralised monitoring computer system is used to test systems in flight and on the ground using?
A centralised on board control unit
A fault light appears on the IRS mode selector unit during the alignment sequence. The correct action is?
Select HDG/STS on the ISDU, observe the action code in the right alpha/numeric display
A FDR can obtain information from aircraft instruments provides?
There is adequate isolation
A flight data recorder should be capable of recording the last?
25 hrs of operation
An FMS has a total of how many databases?
2
A full operation system bite check will carry out an internal system test that ensures the system meets design requirements and is operational as well as checking the full system but will not?
Move the controls to their stops
A level B alert message in EICAS requires?
Timely action
A method used in modern aircraft for reporting in flight faults to an engineering and monitoring ground station is?
ACARS
A modern electromagnetic FDR for recording data could use?
A plastic tape coated in ferrite
A single failure of a fly by wire control surface computer will?
Not have any operational effect on the system
A single failure of a fly by wire system has?
No effect on aircraft operation
A strap down INS has a?
Solid state accelerometer system
ACARS is an acronym for?
Aircraft Communicating, Addressing and Reporting system
An ACARS system operates in the frequency range?
131.550 Mhz
ACARS is used to?
Download aircraft status reports
An EICAS message of level D provides?
Only message
An FDR fitted to a helicopter begins recording?
On engine start up
An FMS navigation database is updated?
Every 28 days
An FMS system besides controlling navigation, thrust and auto-nav also provides?
Dedicated status and warnings