Probe and Sensor Heat
Option - Captain’s pitot probe on standby power.
Pitot probes, the total air temperature probe and the alpha vanes are electrically heated.
Static ports are not heated. When operating on standby power, only the captain’s pitot
probe is heated, however, the CAPT PITOT light does not illuminate for a failure.
Note: The pitot probe for standby airspeed is not heated when the airplane is on standby
power.
ADIRS (Air Data Inertial Reference System) and ADIRU
The ADIRS produces flight data such as position, speed, altitude and attitude for the flight
displays, flight management computers, flight controls, engine controls and all other
systems requiring inertial and air data. The major components of the ADIRS are:
- Two air data inertial reference units (ADIRUs)
- Four air data modules (ADMs)
- One Inertial System Display Unit (ISDU)
- One dual mode select unit (MSU)
- Six static ports
- Three pitot probes
- Two alpha vanes
- One total air temperature probe.
