9 / 20
What is correct about an Air Data Computer (ADC)?
  • A
    An ADC is an auxiliary system that provides altitude information in the event that the static source is blocked.
  • B
    An ADC transforms air data measurements into electric impulses driving servo motors in instruments.
  • C
    An ADC converts air data measurements given by ATC from the ground in order to provide correct altitude and speed information.
  • D
    An ADC measures position error in the static system and transmits this information to ATC to provide correct altitude reporting.
AIR DATA COMPUTER (ADC)
An Air Data Computer (ADC) is used by aircrafts to acquire data from pitot and static pressure sensors, data buses and analog inputs and convert those raw inputs into electrical signals, obtaining key air data parameters such as altitude, airspeed, height deviation and temperature to ensure safe and accurate flight detail, on both rotary and fixed wing aircraft.
  • Two types of ADC exist – analog and digital. Initially, only the temperature and the pitot/static pressures were provided to the ADC. From these inputs it was able to compute and provide airspeed (Pt - Ps = CAS/IAS), Mach number, altitude, TAS and GS indications. However, now, the AOA probe also provides inputs to the ADC. All this data is joined together and is transmitted from the ADC to other systems such as the FMS, AFCS, TAWS, TCAS, transponder, EFIS (via the symbol generator) etc. The only temperature measured in an aircraft usually fitted with an ADC (commercial aircraft) is the TAT; there’s no OAT probe. The OAT is internally calculated by the ADC by taking into account the ram rise and the recovery factor.
 

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

Keyboard Shortcut Use Keyboard Shortcuts