Cessna 177 SERIES Service Manual

7-4.
TROUBLE
SHOOTING
(Cont).
TROUBLE
PROBABLE
CAUSE
REMEDY
FLAPS
FAIL
TO
RETRACT.
Defective,
loose
or improperly
Adjust
and
secure
switch.
adjusted
aft
operating
switch.
Replace
if defective.
FLAP
MOTOR
CONTINU-
Microswitches
improperly
ad-
Rig
per paragraph
7-21.
OUSLY
FREEWHEELS.
justed.
FLAP
POSITION
INDICATOR
Follow-up
control
slipping,
Connect
and secure
control.
FAILS
TO
RESPOND
OR
broken
or disconnected.
Replace
if defective.
READINGS
ERRONEOUS.
Pointer
bent
or broken.
Replace
defective
parts.
7-5.
FLAP
MOTOR,
TRANSMISSION
AND
ACTU-
7-8.
FLAP
CONTROL
LEVER.
ATOR ASSEMBLY.
7-9.
REMOVAL
AND
INSTALLATION.
(Refer
to
7-6.
REMOVAL
AND
INSTALLATION.
figure
7-1.)
a.
Place
master
switch
in the
ON
position,
run
flaps
a. Disconnect
battery
cables
and insulate
terminals
to the
full
DOWN
position
then place
master
switch
in
as
a safety
precaution.
the OFF
position.
b.
Remove
follow-up
control
(19)
from
switch
mount-
b.
Remove
aft
baggage
compartment
wall,
discon-
ing
arm (24).
nect
battery
cables
from
battery
and
insulate
termi-
c.
Remove
flap operating
switches
(26
and
28) from
nals
as a safety
precaution.
switch mounting
arm (24).
It is
not necessary
to dis-
c.
Remove
access
plates from
below
actuator
as-
connect
electrical
wiring
at switches.
sembly.
d. Remove
knob
(29)
from control
lever
(21).
d. (Refer to figure
7-1.) Remove
headliner
access e.
Remove remaining
items by
removing attaching
cover, remove
safety
wire and
relieve cable
tension
bolt.
Use care not
to drop parts
into tunnel
area.
at turnbuckles
(12 and
12A).
f. Reverse
the preceding
steps
for reinstallation.
e. (Refer
to figure
7-2.) Disconnect
direct cables
Do not
overtighten
attaching
bolt causing
lever
(21) to
(3)
from
actuator
guide
assembly
(7).
bind.
Rig
system
in accordance
with
paragraph
7-21.
f.
Remove
bolt
(14)
securing
follow-up
control
lever
(11)
to
actuator
guide
assembly
(7).
7-10.
DRIVE
PULLEYS.
g. Remove
screws
securing
lower
support
(22)
to
brackets
(16
and 21).
7-11.
REMOVAL
AND
INSTALLATION.
(Refer
to
h.
Remove
bolt (6) securing
motor
and
transmis-
figure
7-1.)
sion
assembly
to bracket
(21).
Move
lower
support
a. Run
flaps
to
full DOWN
position.
(22)
and
motor
and
transmission
assembly
outboard
b.
Remove
headliner
access
cover,
remove
safety
to
allow
access
to
upper
support
screws,
wire
and relieve
cable
tension
at turnbuckles
(12
and
i.
Remove
screws
securing
upper
support
(2)
to
12A).
brackets
(16
and
21).
Place
switches
(17
and
18)
c.
Remove
access
plates
adjacent
to
drive
pulley
and all attaching
hardware
out of the
working
area.
(2).
j.
Slide
the
lower
support
(22)
out
of
grommet
in
d. Remove
bolt
securing
flap
push-pull
rod
(9) to
the
actuator
guide
assembly
(7) and
remove
support
drive
pulley
(2).
from
the
wing.
e.
Remove
bolt
securing
synchronizing
push-pull
k.
Disconnect
electrical
quick-disconnect
(15).
tube
(1)
to
drive
pulley
(2).
1.
Using
care,
remove
motor
(1),
transmission
(4),
f.
Remove
cable
guards
(6).
actuator
guide
assembly
(7) and
upper
support
(2)
g. Remove
cable
lock
pins
(7)
and
disconnect
from
wing
through
access
opening
as
a unit.
cables
(8
and
10) from
drive
pulley.
Tag
cables
m.
Reverse
the preceding
steps
for
reinstallation.
for reference
on reinstallation.
Rig
system
in
accordance
with
paragraph
7-21,
safety
h.
Remove
pivot
bolt
(5) attaching
drive
pulley
to
turnbuckles
and
reinstall
all items
removed
for
ac-
wing
structure.
cess.
i.
Remove
drive
pulley
(2)
through
access
opening,
using
care
not
to drop
bushing
(4).
Retain
brass
7-7.
REPAIR.
Repair
consists
of
replacement
of
washer
between
drive
pulley
and
support
bracket.
motor,
transmission
or
coupling.
For
lubrication
Tape
open
ends
of pulley
to
protect
bearings
(3).
requirements
refer
to Section
2.
Change
5
7-3

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)