Interior Lighting - Cirrus SR22 Pilot Operating Handbook

C D
IRRUS ESIGN
SR22

Interior Lighting

Interior lighting for the airplane consists of overhead lights for general
cabin lighting, individual lights for the pilots and passengers, and
dimmable panel floodlights. The flight instrumentation and avionics
equipment lights are dimmable.
Instrument Lights
Instrument lighting for the airplane includes: Primary Flight and Multi-
function Display backlighting and bezel, bolster switch panel, audio panel
keys, FMS keyboard, and optionally installed GMC 705 AFCS Control
Unit, incandescent lights in the standby instrument bezels, key back-
lighting and status lighting for the flap and Environmental Control System
(ECS) control panels. Associated lighting is adjustable through the
INSTRUMENT dimmer control on the instrument panel bolster. The
dimmer is OFF when rotated fully counterclockwise, all systems revert to
daytime lighting in this position (not full DIM).
In daytime lighting (knob OFF/full counterclockwise):
• Standby instruments, all Avionics system keypads and the bolster
switch panel are unlit.
• MFD and PFD screen illumination is controlled by automatic photo-
cell (providing full brightness in high light conditions, only slightly
reduced by darkness).
• ECS and control panels are backlight and their status lights at
maximum intensity.
With active dimming (knob moved clockwise), the full bright position (full
clockwise) applies maximum illumination to keys and switches, to standby
instruments and to status lights, but the PFD/MFD screen illumination is
at a substantially reduced level (levels still appropriate for night flight).
Maximum screen illumination (appropriate for daytime use) is with the
dimmer OFF/full counterclockwise.
The instrument light circuits operate on 28 VDC supplied through the
5-amp CABIN LIGHTS circuit breaker on MAIN BUS.
Panel Flood Lights
A string of red LEDs mounted under the instrument panel glareshield
provide flood lighting for the instrument panel. The lights are controlled
through the PANEL dimmer control on the instrument panel bolster.
The panel lights operate on 28 VDC supplied through the 5-amp CABIN
LIGHTS circuit breaker on MAIN BUS 1.
P/N 13772-006
Reissue A
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