FES Maintenance manual, v1.16 May 2020
Page 11 of 24
FCC box
is where all signal and 12V wires meet and are distributed to the right
consumers. It houses a microprocessor for automatic propeller positioning, a 2A fuse, a
potentiometer for adjusting the electronic brake, and a female DB9 connector used when
updating the FCU.
A 12V battery
acts as a redundant power supply for the instruments when the main
battery packs are not installed. The battery must be equipped with a 3A fuse.
A 325A power fuse
protects the entire system in case of a high power short-circuit.
FCU instrument
displays battery and propulsion system information to the pilot via the
screen and three status LEDs and houses the throttle rotary control knob.