HOAC AUSTRIA
DV 20 Flight Manual
Description
Trim
Green knob on center console behind engine control unit. The spring loaded trim knob can be
unlocked and moved to the desired position by pulling it upwards. Releasing the knob will cause it to
lock in the desired position.
knob forward
=
nose down
The flaps are driven by an electric motor. The flaps are controlled by a three position flap operating
switch on the instrument panel. The three positions of the switch correspond to the position of the
flaps, where the top position of the switch is used during cruise flight. When the switch is moved to a
different position, the flaps move automatically until the selected position is reached (follow up
system). The cruise (fully retracted) and landing (fully extended) positions are additionally equipped
with a limit switch to prevent overtraveling.
The control of the position is done by a notch/switch device. Due to the special circuits, the system is
redundant.
The electric flap actuator is protected by an automatic circuit breaker (3.5
A)
located in the circuit
breaker panel at the top of the instrument panel and can also be triggered manually.
Position Indicator
The current flap position is indicated by three control lights beside the flap operating switch.
When the upper light illuminates (green), the flaps are in cruise position (UP). When the center light
illuminates (yellow) the flaps are in take-off (T/O) position. When the lower light (yellow) illuminates,
Revision No.
Reference
Date
October 20, 1 993
Page
7 - 3
