Insufficient Rate Of Charge; Windshield Damage; Other Emergencies - Cessna 172R Operating Handbook

CESSNA
MODEL 172R

INSUFFICIENT RATE OF CHARGE

The low voltage annunciator (VOLTS) may come on and
ammeter discharge
conditions with an electrical load on the
a low RPM taxi. Under these conditions, the
during
annuciator will go off at higher RPM.
If the overvoltage sensor should shut down the alternator
the alternator circuit breaker
low, a discharge
illumination of the low voltage annunciator (VOLTS).
may be a "nuisance" trip
reactivate the alternator
master switch to
breaker (ALT FLD) is in,
the OFF position and then
longer exists, normal alternator charging will resume and the low
voltage annunciator (VOLTS) will go off. The avionics master switch
may then be returned to the ON position.
If the annunciator illuminates again,
In this
event,
drain on the battery minimized because the battery can supply the
electrical
system for
must be conserved for later
emergency occurs
during landing.

OTHER EMERGENCIES

WINDSHIELD DAMAGE

a
If bird strike or other
the point of
flight to
performance may be expected.
some cases
(depending on
opening the side windows while the airplane is maneuvered for a
landing at the nearest airport. If airplane performance or other
adverse conditions preclude landing
"off airport" landing in accordance with the Precautionary Landing
With Engine Power or Ditching checklists.
Revision 7
indications
(ALT FLD),
will be shown on the
rate
out,
system.
the OFF position, check that the alternator
then
set
to
the flight should be terminated and/or the current
only a limited period
operation
night, for possible
at
incident should damage
creating
amount
EMERGENCY PROCEDURES
NOTE
may occur during low RPM
or
if the alternator output
an
attempt
To reactivate,
both sides of the master switch
the ON position. If the problem
a malfunction is
of time. Battery power
the wing flaps
of
use of the landing
an
opening, a significant loss in
This loss may
of damage, altitude,
an airport, prepare for an
at
SECTION 3
such as
system,
and trip
followed by
ammeter
Since
should be made
avionics!
the
set
confirmed.!
and, if the
the windshield in
be minimized in
etc.) by
3-23/3-24
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to
circuit!
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