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Emergencies caused by aircraft or engine malfunctions are extreme
if
ly rare
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
1
this section should
in
the problem.
ELECTRICAL POWER SUPPLY SYSTEM MALFUNCTIONS.
Malfunctions in the electrical power supply system can be detected by
periodic mOnitoring
ever, the cause
broken alternator drive belt or wiring is most likely the cause of alterna
tor failures, although other factors could cause the problem.
or improperly adjusted voltage regulator can also cause malfunctions.
Problems of this nature constitute an electrical emergency and should be
dealt with immediately.
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
extended taxiing) the battery condition will be low enough to ac
as
cept above normal charging during the initial part of a flight.
after thi.:'ty minutes
less than two needle widths of charging current.
were to remain above this value on a long flight, the battery would over
heat and evaporate the electrolyte at an e
ponents in the electrical system could be adversely affected by higher
than normal voltage
overcharging.
will automatically shut down the alternator and the over-voltage warning
EM ERG ENCY PROCEDURES
should an emergency arIse, the basic guidelines described
considered and applied as necessary to correct
be
of
the ammeter and over-voltage warning light; how
of
these malfunctions is usually difficult to determine.
Electrical power malfunctions usually fall into
of
cruising flight, the ammeter should be indicating
a faulty voltage regulator setting is causing the
if
To preclude these pOSSibilities, an over-voltage sensor
Section III
the charging rate
H
c
s
v
e
i
e rate.
x
s
A
A
damaged
However,
Electronic com
3-1
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