Airplane Flight Manual Supplement

Hawker Beechcraft C90A and C90GT King Air 190-00682-02 Rev. C
Page 92 of 95
During normal operations, the standby battery is kept in a fully charged state by its own trickle charger
powered from the triple-fed bus through the STBY AUX BAT circuit breaker located on the right side
circuit breaker panel.
LIGHTING SYSTEMS
COCKPIT
An overhead light control panel, accessible to both pilots, incorporates a functional arrangement of all
lighting systems. Each light group has its own rheostat switch placarded BRT – OFF. The MASTER
PANEL LIGHTS – ON – OFF switch is the master switch for: PILOT PFD, STBY INSTR, MFD, OVHD
PED & SUBPANEL SIDE PANEL CLOCKS, and COPILOT PFD.
PILOT PFD – Controls the brightness of the pilot’s PFD.
STBY INSTR – Controls the brightness of the internal lighting for the standby attitude indicator,
standby altimeter, and standby airspeed indicator.
MFD – Controls the brightness of the Multi-Function Display (MFD).
OVHD PED & - Controls the brightness of the backlighting of the overhead light control panel
SUBPANEL and internal lighting of the overhead electrical gauges, throttle quadrant
backlighting, internal lighting for pedestal mounted gauges, and the MFD
Controller panel backlighting, and the subpanel backlighting.
SIDE PANEL – Controls the brightness of the backlighting of the right side circuit breaker panel,
the left side circuit breaker panel and the fuel gauge panel.
CLOCKS – Controls the brightness of the clocks mounted in the pilot’s and copilot’s control
wheels.
COPILOT PFD – Controls the brightness of the copilot’s PFD.
Separate rheostat switches individually control the instrument indirect lights in the glareshield and
overhead map lights.
An INSTRUMENT EMERG LIGHTS switch is located on the right side of the overhead electrical gauge
panel. This switch turns on indirect lights under the glareshield. These lights are separate from the
Instrument Indirect lights. The brightness of the Emergency Lights is not controllable. These lights are
powered from the Hot Battery bus.
PITOT AND STATIC SYSTEM
PITOT
The pitot heads are the sources of impact air for the operation of the flight instruments.
A heated pitot mast is located on each side of the lower portion of the nose. Tubing from the left pitot
mast is connected to the pilot’s Air Data Computer (ADC1), and tubing from the right pitot mast is
connected to the copilot’s Air Data Computer (ADC2) and the standby airspeed indicator. The switch for
the PITOT – LEFT – RIGHT – OFF is located in the ICE PROTECTION group on the pilot’s right
subpanel.