Piper Cherokee Six - Alternator System Test Procedure (Chrysler)

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
NOTE
The
amount
of
current
shown
on
the
ammeter
is
the
load
in
amperes
that
is
demanded
by
the
electrical
system
from
the
alternator.
As
a check,
take
for
ex-
ample
a
condition
where
the
battery
is
demanding
10
amperes
charging
current,
then
switch
on
the
landing
light.
Note
the
value
in
amperes
placarded
on
the
panel
for
the
circuit
breaker
(10
amps)
and
multiply
this
by
80
per
cent,
you
will
arrive
at
a
current
of
8
amperes.
This
is
the
approximate
current
drawn
by
the
landing
light.
Therefore,
when
the
landing
light
is
switched
on,
there
will
be
an
increase
of
current
from
10
to
18
amperes
displayed
on
the
ammeter.
As
each
unit
of
electrical
equipment
is
switched
on,
the
cur-
rents
will
add
up
and
the
total,
including
the
battery.
will
appear
on
the
ammeter.
10-4.
ALTERNATOR
SYSTEM
TEST
PROCEDURE
(CHRYSLER).
a.
Start
engine
and
set
throttle
for
2000
to
2200
RPM.
b.
Switch
on
the
following
loads
and
observe
the
ammeter
reading
increases
as
follows:
1.
Rotating
beacon
3.5
amps
2.
Anti-Collision
lights
(PA-32R-300)
4.4
amps
3.
Landing
light
8.0
amps
4.
Navigation
and
all
instrument
panel
lights
6.5
amps
5.
All
passenger
reading
lights
4.0
amps
6.
Pitot
heat
13.0
amps
7.
Cigarlighter
8.0
amps
c.
If
the
ammeter
fails
to
show
an
increase
as
indicated,
refer
to
troubleshooting
chart.
d.
Additional
loads
may
be
simulated
by
adding
landing
lights
(8.0
amps
per
light)
from
the
bus
bar
to
the
aircraft
ground.
(Refer
to
Figure
10-3.)
e.
Maximum
output
of
the
alternator
should
be
60
±
5.0
amps
at
2000
to
2200
RPM.