Section 7
Description of the Airplane and Systems
Columbia 400 (LC41-550FG)
RC050002
Initial Issue of Manual: November 10, 2004
7-64
Latest Revision Level/Date: -/11-10-2004
Trim, Flaps, Fuel Tank Position, and Annunciator Panel (Press-to-Test PTT) –
The test
feature for these items is located in the lower right area of the trim panel, which is next to the
rocker switch panel. Pushing the test button verifies the operation of all the LEDs associated with
the trim, flaps, fuel tank position, and annunciator panel. When the test position is selected, all
related LEDs illuminate in the bright mode. A light that fails to illuminate should be replaced.
The position light switch on the rocker panel controls the intensity of these lights. When the
position lights are on, the trim, flaps, fuel tank position, and annunciator lights operate in the dim
mode. When the position lights are off, the lights operate in the bright mode. The degree of
luminance is set at the factory and cannot be adjusted manually. In the daytime, during periods of
reduced ambient light, the position lights can be turned on if the illumination of the LEDs is
distracting.
Interior Light Protection
– With the exception of the flip lights, all interior lights are connected
to the essential bus and will only operate when the master switches are on. The light systems are
protected by circuit breakers in the circuit breaker panel.
AIRPLANE EXTERIOR LIGHTING SYSTEM
Aircraft position and anti-collision or strobe lights are required to be lighted on aircraft operated
from sunset to sunrise. Anti-collision lights, however, need not be lighted when the pilot-in-
command determines that, because of operating conditions, it would be in the interest of safety to
turn off the lights. For example, strobe lights shall be turned off on the ground if they adversely
affect ground personnel or other pilots and in flight when there are adverse reflections from
clouds.
The exterior lighting system includes the position lights, the strobe or anti-collision lights, the
landing light, and the taxi lights. These lights are activated through use of switches in the rocker
switch panel. The light system is protected by circuit breakers in the circuit breaker panel.
Position and Anti-collision Lights
– The left and right position lights (red and green) are
mounted on each wing tip. Each wing position light contains the required aft or rearward
projecting white lights.
The anti-collision lights are on each wingtip and contained within the
same light fixture as the position lights.
Taxi and Landing Lights
–
The taxi and landing lights are contained in the leading edge of the
left wing. The outboard bulb in the light housing is the taxi light that provides a diffused light in
the immediate area of the airplane. The inboard bulb is the landing light, which has a spot
presentation with a slight downward focus. The taxi and landing lights are sized for continuous
duty and can be left on for operations in high-density traffic areas.
STALL WARNING SYSTEM
Stall Warning
– The aural stall warning buzzer in the overhead console is actuated by a vane-
type switch located on the leading edge of the left wing. Under normal flight conditions, the
angle of relative wind flow keeps the vane in the down position. The vane is connected to an
electrical switch that is open under normal flight operations. When the airplane approaches its
critical angle of attack, the relative wind pushes the vane up and closes the switch. The switch is
set to activate approximately five to ten knots above the actual stall speed in all normal flight
configurations.