Cessna 182 1973 - Emergency Procedures; Electrical Power Malfunctions

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EMERGENCY
PROCEDURES
Emergencies
caused
by
aircraft
or
engine
malfunctions
are
extreme-
ly
rare
if
proper
pre-flight
inspections
and
maintenance
are practiced.
Enroute weather
emergencies
can
be
minimized
or
eliminated
by
careful
flight
planning
and
good judgement
when
unexpected
weather
is
encounter-
ed.
However,
should
an
emergency
arise,
the
basic
guidelines
described
in
this section
should be
considered
and
applied
as
necessary
to
correct
the
problem.
ELECTRICAL
POWER
SUPPLY
SYSTEM
MALFUNCTIONS.
Malfunctions in
the
electrical
power
supply
system
can
be
detected
by
periodic
monitoring
of
the
ammeter
and
over-voltage
warning light;
how-
ever,
the
cause
of
these
malfunctions
is
usually
difficult to
determine.
A
broken
alternator
drive belt
or
wiring
is
most
likely
the
cause
of
alterna~
tor
failures,
although
other
factors
could
cause
the
problem.
A
damaged
or improperly
adjusted voltage
regulator
can
also
cause
malfunctions.
Problems
of
this nature
constitute
an
electrical
emergency
and
should
be
dealt with
immediately.
Electrical
power
malfunctions
usually
fall
into
two
categories:
excessive
rate
of
charge
and
insufficient
rate
of
charge.
The
paragraphs
below
describe
the
recommended
remedy
for
each
situa-
tion.
.
EXCESSIVE RATE
OF CHARGE.
After
engine
starting
and
heavy
electrical
usage
at
low
engine speeds
(such
as
extended
taxiing)
the
battery
condition
will
be
low
enough
to
ac-
cept
above
normal
charging
during
the
initial
part
of
a
flight.
However,
after
thirty
minutes
of
cruising
flight,
the
ammeter
should be
indicating
less
than
two needle widths
of
charging
current.
If
the
charging
rate
were
to
remain
above
this
value
on
a
long flight,
the
battery
would
over-
heat and
evaporate
the
electrolyte
at
an
excessive
rate.
Electronic
com-
ponents
in the
electrical
system
could
be
adversely
affected
by
higher
than
normal
voltage
if
a
faulty voltage
regulator
setting
is
causing
the
overcharging.
To
preclude
these
possibilities,
an
over-voltage sensor
will
automatically
shut
down
the
alternator
and
the
over-voltage
warning
*
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