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GROUND SERVICE PLUG
PILOT'S OPERATING HANDBOOK
RECEPTACLE
SUPPLEMENT
MODEL 172RG
SECTION 2
LIMITATIONS
The following information must be presented in the form of a placard
located on the inside of the ground service plug access door:
CAUTION
24 VOLTS D.C.
This aircraft is equipped with alternator
and a negative ground system.
OBSERVE PROPER POLARITY
Reverse polarity will damage electrical
components.
SECTION 3
EMERGENCY PROCEDURES
There is no change to the airplane emergency procedures when the
ground service plug receptacle is installed.
SECTION 4
NORMAL PROCEDURES
Just before connecting an external power source (generator type or
battery cart), the avionics power switch should be turned off, and the
master switch turned on.
WARNING
I
When turning on the master switch, using an external
power source, or pulling the propeller through by hand,
treat the propeller as if the ignition switch were on. Do not
stand, nor allow anyone else to stand, within the arc of the
propeller, since a loose or broken wire, or a component
malfunction, could cause the propeller to rotate.
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1 July 1979
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PILOT'S OPERATING HANDBOOK
GROUND SERVICE PLUG
SUPPLEMENT
RECEPTACLE
MODEL 172RG
The ground service plug receptacle circuit incorporates a polarity
reversal protection. Power from the external power source will flow only if
the ground service plug is correctly connected to the airplane. If the plug is
accidentally connected backwards, no power will flow to the electrical
system, thereby preventing any damage to electrical equipment.
SECTION 5
PERFORMANCE
There is no change to the airplane performance when the ground
service plug receptacle is installed.
1 July 1979
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