ne
Section
[1]
nm
Ee.
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
*
3-1
Summary of Contents for 182 1973
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