Cessna 177 SERIES Service Manual

Charging Systems Service /Parts Manual.
show a discharge. Turn off both
sections of the Master
Switch to recycle the
over-voltage sensor.
If the
16-43C. ALTERNATOR VOLTAGE
REGULATOR. over-voltage condition
was transient, the normal al-
BEGINNING
WITH
17702673.
ternator
charging will
resume and no
further action
is necessary.
If
the over-voltage
trip-out
recurs
then
16-43D.
DESCRIPTION. The
regulator is solid state
and a generating system
malfunction has occurred
such that
not repairable in
the field The regulator
is a remove and the
electrical accessories must
be operated from the
replace item.
A bench adjustment
procedure
is outlined
aircraft battery
only. Conservation
of electrical
energy
in the Cessna
Alternator Charging
Systems Service/
must be practiced
until the flight can be
terminated.
Parts Manual.
The over-voltage
red warning
light filament
can be
tested
by turning off the
Alternator portion
of the
16-44.
TROUBLE SHOOTING.
For trouble shooting
Master Switch and
leaving the Battery portion
turned
the voltage
regulator, refer
to paragraph
16-39.
on. This test
does not induce
an over-voltage
condition
on
the electrical
system.
On models
prior to aircraft
16-45.
REMOVAL AND INSTALLATION.
(Refer to
serial 17701690, should
nuisance trip-out occur
caused
figure 16-5.)
by voltage spikes or
transient voltage, a trip-out
a. Make sure that
the master switch
is off, or discon-
capacitor
should be
installed in the system
in accordance
nect the negative
lead from
the battery.
with Cessna Single-engine
Service
Letter SE72-15,
dated
b. Remove
the connector plug from
the regulator.
April 21, 1972. After installation
if the over-voltage
c. Remove two
screws holding
the regulator on
the trip-out
recurs then
a generating
system malfunction
firewall.
has occurred such that
the electrical accessories
must be
d. To replace
the regulator,
reverse the
procedure.
operated from
the aircraft battery
only. Conservation
Be sure that the
connections for
grounding the
alter-
of electrical energy
must be practiced
until the flight
nator,
wiring shields
and the base of
the regulator
can be
terminated.
are clean and bright
before assembly. Otherwise,
poor
voltage regulation
and/or excessive
radio noise
16-48.
AIRCRAFT
LIGHTING
SYSTEM.
may result.
16-49.
DESCRIPTION.
The aircraft
lighting
system
16-46. OVER-VOLTAGE
WARNING SYSTEM.
consists
of landing and taxi lights,
navigation lights,
flashing
beacon light, anti-collision
strobe lights,
16-47. DESCRIPTION.
Beginning
with 1972 Models,
dome light, instrument
flood lights, courtesy
lights,
an over-voltage warning system is incorporated in the control wheel map light, compass and radio dial lights.
aircraft. The over-voltage warning system consists On 1969 models & on, snap-in type rocker switches
of an over-voltage sensor
switch and a red warning are introduced.
These switches have a design feature
light labeled,
"HIGH VOLTAGE",
on the instrument
which permits them
to snap into
the panel from
the
panel. When
an over-voltage
trip-off occurs
the over-
panel side and
can subsequently
be removed
for easy
voltage
sensor turns off the
alternator system and
maintenance.
These switches also feature
spade type
the red warning
light comes on.
The ammeter will
slip-on
terminals.
16-50. TROUBLE SHOOTING-- AIRCRAFT LIGHTING SYSTEM.
TROUBLE
PROBABLE CAUSE
REMEDY
LANDING
AND TAXI
LIGHTS
Short circuit
in wiring.
1. Inspect circuit
breaker. If
OUT
circuit breaker
is open,
proceed
to step 2.
If circuit breaker
is
OK, proceed to step 3.
Defective
wiring.
2. Test
each circuit separately
until short is located. Repair
or replace wiring.
Defective switch.
3.
Check voltage
at lights with
master
and landing
and
taxi
light
switches
ON. Should read
bat-
tery voltage. Replace switch.
LANDING OR
TAXI LIGHT
Lamp
burned out.
1. Test lamp
with ohmmeter
or
OUT.
new lamp. Replace lamp.
Open
circuit in wiring.
2. Test
wiring for continuity.
Repair or replace wiring.
FLASHING
BEACON DOES
Short circuit
in wiring.
1. Inspect circuit
breaker. If
NOT
LIGHT.
circuit
breaker is
open, proceed
to
step 2. If circuit
breaker
is
OK, proceed to step 3.
16-14
Change8

Cessna 177 SERIES Specifications

General

Manufacturer	Cessna
Engine Type	Piston
Wingspan	35 ft 6 in (10.82 m)
Seating Capacity	4
Number Built	4, 295
Engine	Lycoming O-360
Horsepower	180 hp
Maximum Takeoff Weight	2, 500 lb (1, 134 kg)