Flight Instruments Flashcards
The SPZ-8000 is fail passive or fail operational?
Fail operational
What controls the ASCB?
The FGC
The AHRS is comprised of the following components:
D Strapdown AHRU
D AHRS controller/remote compensator
D Thin flux valve
The standard APIRS system consists of the following:
.
D Dual AHRUs
D Dual AHCPs
D Dual flux valves
The air data system consists of the following components:
.
D Air data computer
D Barometric altitude indicator
D Altitude preselect controller
The radio altimeter system consists of the following components:
D Radio altimeter receiver/transmitter
D Radio altimeter antenna.
The radio altimeter system gives an absolute altitude display from 0 to 2500 feet. It also selects decision height, and has its own failure annunciation and an internal self- -test.
The EFIS consists of the following components:
D Electronic display (electronic attitude director indicator (EADI) and electronic horizontal situation indicator (EHSI))
D Symbol generator
D Display controller
D Instrument remote controller
How many FGCs and autopilots are installed on the dash 8?
2 FGCs and 1 autopilot
The dual FGS consists of the following components:
D Flight guidance computer
D Flight guidance controller
D Advisory display
D Servo drive and bracket (aileron and elevator)
D Linear actuator (rudder)
D Elevator trim servo.
What happens when the GA button is pushed?
In the Series 200 aircraft, it disengages the autopilot and commands a wings level, 10deg nose- -up attitude with flaps extended, or 12deg nose- -up attitude with flaps retracted. In the Series 300 aircraft, a 9_ nose- -up attitude is commanded for all flap settings.
If a heading error should develop, while in the SLAVED mode can it be rectified?
The error can be removed by momentarily entering the DG mode and returning to the SLAVED mode. This is performed by pushing the HDG/DG button on the AHRS controller twice.
Where does the AHRS get power from?
The left AHRS gets power from the left essential bus and secondary power from the right essential. The right AHRS is powered from right main with secondary from the left essential.
I what happens when the primary source of power fails for the AHRS?
automatic power transfer within the AHRS to the auxiliary input. When primary power input is restored, the AHRS switches back to the primary power source. AUX PWR annunciator on the AHRS controller is lit 2 seconds after the power transfer has occurred and extinguishes once primary power is restored.
What does a basic light mean?
AHRS operation in the BASIC mode results in an attitude system that is similar in behavior to a conventional VG with pitch and roll erection cutoffs, and is subject to drift and acceleration errors when true airspeed becomes invalid from the air data compute
The AHRS is equipped with automatic self- -test which is performed when power is first applied. The test lasts 5 seconds and provides the following visual outputs on the ADI and HSI:
D 10_ pitch up
D 20_ right wing down
D North heading, turning at 3_/sec toward East
D All AHRS controller annunciators ON
D ATT flag valid for 2.5 seconds, then invalid
D HDG flag valid for 2.5 seconds, then invalid
D Rate- -of- -turn indicator standard rate (3_/sec) right turn (on optional EFIS EADI).
