TM 1-1510-218-CL
P-6
ANTI-ICE/DEICE SYSTEMS
1. Prop deice – Check. When MANUAL mode is
selected, note rise on DC loadmeter. When
AUTO mode is selected, monitor prop ammeter
for the appropriate number of seconds and ensure
the indicator remains in the normal operating
range the entire time.
2. Windshield heat – Check. Note increases on the
loadmeter and cycle through both normal and
high settings.
NOTE
If windshield heat is needed prior to takeoff,
use NORMAL setting for a minimum of 15
minutes prior to selecting HIGH to provide
adequate preheating and minimize the
effects of thermal shock. The windshield
heat thermostat will invalidate the check in
OAT above 20° to 30 ° C.
3. All anti-ice/deice switches – OFF.
4. Surface deice system – Check.
VACUUM AND PNEUMATIC SYSTEM
1. LEFT BLEED AIR VALVE – OFF.
a. Pneumatic and suction pressures remain
normal.
b. L BL AIR OFF annunciator illuminates
c. Both BL AIR FAIL annunciators remain
extinguished.
2. RIGHT BLEED AIR VALVE – OFF.
a. Pneumatic and suction pressures read zero.
b. Both BL AIR OFF and BL AIR FAIL
annunciators illuminated.
