Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-52
26-Jul-2017
HORIZONTAL STABILIZER TRIM
The horizontal trim works a little bit different than the other systems;
when adjusting the trim, the entire stabilizer is moved by two motors and
a jack screw. Pitch trim is limited to +2° up and -13° down.
There are four elevator trim modes:
- Manual trim: The stabilizer is moved according the input from
the trim switches. The adjustment of the stabilizer is adjusted
over speed.
- Autopilot trim: With the autopilot activated it trims
automatically as soon as it detects that loads are building up on
the control surfaces
- AUTO trim: With flaps moving between 0 and 20° AUTO trim
helps to reduce pitch input resulting from moving flaps.
- Mach trim: Helps to compensate the aircrafts tendency of
putting the nose down with increasing Mach numbers
1. Stabilator trim channel engage
2. Mach trim engages
Amber light indicates Mach trim is unserviceable
3. Trim switches (of course the default trim key commands from FS
can also be used.
The trim position is shown on the Flight Control display and
is colour coded:
• Green: Take-off configuration
• White: NOT in Take-off configuration