Cessna 177 SERIES Service Manual

15-20.
TROUBLE
SHOOTING--ALTIMETER
TROUBLE
PROBABLE
CAUSE
REMEDY
INSTRUMENT
FAILS
TO
Static
line plugged.
Check
line
for obstructions.
OPERATE.
Blow
out lines.
Defective
mechanism.
Substitute
known-good
alti-
meter
and
check
reading.
Replace
instrument.
INCORRECT
INDICATION.
Hands
not
carefully
set.
Reset
hands
with knob.
Leaking
diaphragm.
Substitute
known-good
alti-
meter
and
check
reading.
Replace
instrument.
Pointers
out of
calibration.
Compare
reading
with known-
good
altimeter.
Replace
instrument.
HAND
OSCILLATES.
Static
pressure
irregular.
Check
lines
for obstruction
or
leaks.
Blow
out
lines.
tighten
connections.
Leak
in
airspeed
or vertical
Check
other
instruments
and
speed
indicator
installations.
system
plumbing
for
leaks.
Blow
out lines.
tighten
con-
nections.
15-21.
TROUBLE
SHOOTING--VERTICAL
SPEED
INDICATOR.
TROUBLE
PROBABLE
CAUSE
REMEDY
INSTRUMENT
FAILS
TO
Static
line
plugged.
Check
line for
obstructions.
OPERATE.
Blow
out
lines.
Clean
static
sources.
Static
line
broken.
Check
line
for
damage,
con-
nections
for
security.
Re-
pair
or replace
damaged
line,
tighten
connections.
INCORRECT
INDICATION.
Partially
plugged
static
line.
Check
line
for
obstructions.
Blow
out lines.
Clean
static
sources
Ruptured
diaphragm.
Substitute
known-good
indicator
and
check
reading.
Replace
instrument.
Pointer
off
zero.
Reset
pointer
to
zero.
Reset
pointer
to zero.
POINTER
OSCILLATES.
Partially
plugged
static
line.
Check
line
for
obstructions.
Blow
out lines.
Clean
static
sources.
Change
2 15-9

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)