TM 1-1510-224-10
b.
AUTO PROP deice switch
ON
(momentarily). Check for loadmeter
rise.
c.
MANUAL PROP deice switch ON
(momentarily). Check for loadmeter
rise, then off.
d.
SURFACE deice switch SINGLE
CYCLE AUTO. Check for drop in
pneumatic pressure and wing deice
boot inflation, and after 6 seconds
for
second
drop
in
pneumatic
pressure.
e.
SURFACE deice switch MANUAL.
Check that surface boots inflate,
and remain inflated, then off.
f.
ANTENNA deice switch SINGLE
CYCLE AUTO. Check for drop in
pneumatic
pressure
and
that
antenna deice boots inflate.
g.
ANTENNA deice switch MANUAL.
Check that boots inflate, and remain
inflated, then OFF.
h.
RADOME
anti-ice
switch
ON.
Check
for
loadmeter
rise
and
pneumatic pressure drop then off.
H 8. Pneumatics/vacuum/pressurization Check
as follows:
a.
PNEUMATIC
PRESSURE
gage/GYRO SUCTION gage Check
in green arcs.
b.
CABIN ALT controller Set 500 feet
lower than field pressure altitude.
c.
Cabin pressurization RATE control
Set to maximum.
d.
ENVIRO & PNEU BLEED AIR valve
switches (2) ENVIRO & PNEU off.
e.
PNEUMATIC
PRESSURE
gage/GYRO suction gage Check.
Pressure should drop to zero.
f.
BL AIR FAIL OFF annunciators (2)
Check illuminated.
g.
BL AIR FAIL annunciators (2)
Check illuminated.
h.
CABIN PRESS switch TEST (hold).
i.
LEFT PNEU & ENVIRO BLEED
AIR valve switch ON.
j.
L BL AIR OFF annunciator Check
extinguished.
k.
L and R BL AIR FAIL annunciators
Check extinguished.
l.
PNEUMATIC
PRESSURE
gage/GYRO SUCTION gage Check
in green are.
m.
CABIN CLIMB indicator Check for
descent
indication
within
approximately 10 15 seconds, then
release TEST switch.
n.
LEFT PNEU & ENVIRO BLEED
AIR valve switch Off.
o.
Repeat steps i through m using the
right bleed air valve.
p.
CABIN
PRESS
switch
Set
to
pressure position (center).
q.
CABIN ALT controller Reset as
required.
r.
Cabin pressurization RATE control
Reset as required.
s.
PNEU & ENVIRO BLEED AIR valve
switches (2) ON.
CAUTION
If windshield anti-ice is needed prior
to takeoff, use NORMAL setting for a
minimum of 15 minutes prior to
selecting
HIGH
temperature
to
provide adequate preheating and
minimize effects of thermal shock.
9.
WINDSHIELD anti-ice As required.
WARNING
Do not operate the weather radar set
while
personnel
or
combustible
materials are within 18feet of the
antenna reflector. When the weather
radar set is operating, high-power
radio frequency energy is emitted
from the antenna reflector, which can
have harmful effects on the human
body and can ignite combustible
materials. Do not operate radar in
congested areas.
8-20
