CESSNA
MODEL 172S
SECTION 3
EMERGENCY PROCEDURES
I
I
f
r
ELECTRICAL POWER SUPPLY SYSTEM
MALFUNCTIONS
AMMETER SHOWS EXCESSIVE RATE OF CHARGE
(Full Scale Deflection)
1. Alternator -- OFF ..
. A
CAUTION
WITH THE ALTERNATOR
SIDE OF. THE MASTER
SWITCH
OFF,
COMPASS
DEVIATIONS
OF AS
MUCH AS 25° MAY OCCUR.
2. Nonessential Electrical Equipment -- OFF .
. 3. Flight -- TERMINATE as soon as practical.
LOW VOLTAGE ANNUNCIATOR
(VOLTS)lLLUMINATES
DURING
FLIGHT (Ammeter
Indicates
Discharge)
NOTE
Illumination
of
"VOLTS"
on
the
annunciator
panel
may
occur during low RPM conditions with an electrical load on
the system such as during a low RPM taxi. Under these
conditions, the annunciator
will go out at higher RPM. The
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master switch need not be recycled since an oveNoltage
condition
has
not
occurred
to
deactivate.
the
alternator
system.
1. Avionics Master Switch -- OFF.
2. Alternator Circuit Breaker (ALT FLO) -- CHECK IN.
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3. Master Switch -- OFF (both sides).
4. Master Switch -- ON.
5. Low Voltage Annunciator (VOLTS) -- CHECK OFF.
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6. Avionics Master Switch -- ON.'
.
If low voltage annunciator (VOLTS) illuminates again:
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7. Alternator -- OFF.
8. Nonessential Radio and Electrical Equipment -- OFF.
9. Flight -- TERMINATE as soon as practical.
Revision 4
3-111
Содержание Cessna 172S Skyhawk SP
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