Standby Instrument Electrical Power Checks - Garmin G1000 Nxi System Maintenance Manual

Standby Instrument Electrical Power Checks

This section tests the standby electrical power for the standby MD 302 instrument or standby
analog attitude indicator, standby altimeter, and the standby airspeed indicators. (The magnetic
compass is tested in each Phase inspection during the cockpit lights check in the Beechcraft
King Air 300 Series Maintenance Manual, listed in Table 1-1.)
Step
1. Remove or ensure external aircraft power is
removed. Set main battery switch to OFF.
2. Ensure the STBY INSTR (or STBY ATT and
STBY ALTM) circuit breaker(s) are closed.
3. Ensure the MASTER PANEL LIGHTS rocker
switch in the overhead panel is in the ON
position.
4. Ensure the STBY INSTR knob is turned to full
bright.
Select (depress) the STANDBY BATTERY switch.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Desired Result
Verify the STANDBY BATTERY annunciator/switch is not
illuminated.
Verify the following:
•
For airplanes with MD 302 standby instrument installed.
The MD 302 is activated, initializes, and
o
displays an attitude indication of the top
display and airspeed and altitude tapes on
the bottom display.
The MD 302 brightness has limited
o
adjustment by rotating the knob on the bezel.
•
For airplanes with analog standby instruments installed.
STBY Attitude indicator motor is energized as
o
indicated by the indicator motor and the
absence of OFF flag.
STBY altimeter vibrator is active as indicated
o
by vibrator noise and absence of flag.
STBY attitude, STBY Altimeter, STBY
o
Airspeed indicators are illuminated full bright.
•
Amber "ON" is annunciated full bright on the STANDBY
BATTERY switch.
•
White STANDBY BATTERY legend on the standby
battery switch is illuminated full bright.
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