SECTION
VI1
MOONEY
AIWPMNE
AND
SYSTEMS
DESCRIPTION
MODEL
M20J
The alternator push-pull circuit breaker on the main breaker panel furnishes
an emergency overload break between alternator and the main buss. Since
the alternator is incapable
of
output in excess of the circuit breaker capacity,
a
tripped breaker normally indicates a fauit within the alternator. Since the al-
rernalor is then cut out of the power circuit, the storage battery suppiies
eiectrical power in steadily diminishing output with master switch or).
The alternator field has a push-pull circuit breaker to furnish
an
emergency
break in the alternator field
excitatior~ circuit in the event of alternator or volt-
age
regulator malfunction. If regulator outpi~l voltage exceeds limits, the red
voltage warning light illuminates steadily.
Turning off radio master switch and then turning master switcll
OFF
and
ON,
wiil reset
the
voltage regulator. The overvoltage annunciator light shoulci
rernain out.
If
over\:oltage light comes on again, pulling out alternator-fieid cir-
cuit
breaker cuts alternator
out
of
the
power circuit. Once again
the
banery
is
the only source of electrical power; therefore, all electrical equipment not
essential for flight
sk~ould be turned off and the flight
terminated
as soon
as
practical to correct the malfunction.
/
NOTE
]
*-----
The
~ircbilit
breakers
installed
in
the
panel may
vary
depending
on
I!~ata!led
equipment
per customer
order,
ANNUNCIATOR
PANEL
The landing gear lights, iow fuel lights, voltage light, vacuum warning light,
starter engaged light and alternate air light are grouped
in
the annur?ciator
panel.
A
test switch and dim switch, are also found in the panel; each
of
rhe
lights and
switcties are discussed elsewhere in this section.
The
EU
Panel houses the remote
ELT
Switch and provides room for other
switches as required for optional avionics installations. (See Section
IX for
Avionics Systems installed in this aircraft).
LiGHTitdG SYSTEM
iflstrbament
&
Placard
Lights
All placards are floodlighted by lights from the giareshield. There are two
rheostat knobs on the right ha.nri radio panel. The left control regulates the in.-
tensity of the placard lighting. The right control provides avionic and instru-
ment lighting. Rotating the knobs
clociwise turns on and increases light inten..
sity.
REV.
B
6-12-87
ISSUED
6-2.06
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