Section 7
Columbia 400 (LC41-550FG)
Description of the Airplane and Systems
Initial Issue of Manual: November 10, 2004
RC050002
Latest Revision Level/Date: -/11-10-2004
7-11
condition. Moving the hat switch left or right will correct right wing down and left wing heavy
conditions, respectively.
Simultaneous Trim Application
–
If both switches, pilot’s and copilot’s, are moved in the
same
direction at the same time, the trim will operate in the direction selected. For example, nose
down trim is selected on both hat switches. If the switches are simultaneously moved in
opposite
directions, e.g., pilot’s is nose down and copilot’s is nose up, the pilot’s selection overrides the
copilot’s, and the trim will move to a nose down position. Finally, if trim is simultaneously
selected in
different
directions, e.g., elevator trim is input by one pilot and aileron trim is input
by the other, each trim tab will move in the direction selected.
Trim Position Indicator –
The trim position is displayed on two light bars using a series of blue
LED’s and two green light emitting diodes (LED) that are arranged on the trim panel in the
shape of a plus sign. The vertical lights indicate the position of the elevator trim and the
horizontal lights show the position of the aileron trim. The middle green lights in each bar
indicate the approximate neutral position.
The blue lights are sequentially lit and extinguished as the trim tab moves through its range of
travel. If the two green LED’s in the middle of the “+” is lit and no blue lights are illuminated,
both tabs are in the approximate neutral position. The LED’s level of brightness is controlled by
the position lights switch. When the position lights are on, the trim lights are in the dim mode,
and when the position lights are off, the trim lights are in the bright mode.
Trim On/Off/Reset Switch –
The trim system on/off/reset switch on the right side of the panel
turns off power on all the trim tabs. This switch is used if a runaway trim condition is
encountered. The switch can be cycled to reset or restore normal trim operations. See page 3-24
for an expanded discussion of this issue. The press-to-test switch is discussed later in this section
on page 7-64 under the heading
Trim, Flaps, Fuel Tank Position, and Annunciator Panel (Press-
to-Test)
.
Rudder
Trim
– The airplane has a manually adjustable tab on the lower portion of the rudder.
The tab is adjusted at the factory to produce near neutral rudder pressures at typical cruise
altitude and power settings. At other power settings and/or altitudes a slight amount of rudder
pressure or aileron trim may be required. The owner or operator of the airplane may wish to
adjust this tab to accommodate the most frequently used cruise configuration. The procedures for
adjusting the manual tab are contained in Chapter 27 of the
Columbia 400 Airplane Maintenance
Manual
.
NOTE
Do not adjust the manual rudder tab by hand since this can produce an
uneven deflection or warping of the tab. Refer to the procedures in Chapter
27 of the
Maintenance Manual
for
adjustment of the manual tab.