Cessna T188C - Page 223

MODEL 188 & T188 SERIES SERVICE MANUAL
IIB-10.
TROUBLE
SHOOTING
(Cont).
TROUBLE PROBABLE CAUSE REMEDY
FUEL PRESSURE DECREASES Compressor discharge pressure Check and clean out rcstrictions.
DURING CLIMB. WHILE MANI- line to fuel pump aneroid
FOLD PRESSURE REMAINS restricted.
CONSTANT.
Leaking or otherwise defective Replace engine-driven
engine-driven fuel pump fuel pump.
aneroid.
ABNORMAL MANIFOLD Leak in intake system. Check for cracks and other
PRESSURE DECREASE DURING obvious defects. Tighten all
CLIMB AT
ALTITUDES BELOW
hose clamps and
fittings.
NORMAL PART THROTTLE Replace defective components.
CRITICAL
ALTITUDE
Leak in exhaust system. Check for cracks and other
obvious defects. Tighten all
clamps and fittings. Replace
defective components.
Overboost
Valve
Replace
Valve
Defective
Intake
air filter obstructed.
Service
air filter. Refer
to
Section 2 for servicing
instructions.
Improperly adjusted wastegate Adjust wastegate. Refer to
paragraph
11B-55.
FUEL
FLOW
DOES
NOT
DE-
)efective
engine-driven
fuel
Replace
engine-driven
fuel
CREASE
AS
MANIFOLD
pump
aneroid
mechanism.
pump.
PRESSURE
DECREASES
AT
PART-THROTTLE
Obstruction
or leak
in compressor
Check
for leaks or obstruction.
CRITICAL
ALTITUDE.
discharge
pressure
line
to engine-
Clean
out lines
and tighten
driven
fuel pump.
all connections.
FUEL FLOW
INDICATOR
Moisture
freezing
in
indicator
Disconnect
lines, thaw
ice and
DOES NOT
REGISTER
line.
clean out
lines.
CHANGE IN POWER SETTINGS
AT HIGH ALTITUDES.
SUDDEN POWER
DECREASE
Intake
system air
leak fron
Check hose
condition.
Install
ACCOMPANIED
BY
LOUD
hose
becoming
detached.
hose
and
hose clamp
securely.
NOISE OF RUSHING AIR.
MANIFOLD PRESSURE GAGE
INDICATION
WILL
NOT
PE-
Oil
Gage Line
Check and
Clean
MAIN STEADY
AT CONSTANT
Contaminated
or Replace
POWER
SETTINGS.
OR IS
SLUGGISH.
11B-9