TM 1-1510-254-CL
ICE PROTECTION CHECK
1. PROP deice -- Check. When MANUAL
mode is selected, note rise on DC loadmeter.
When AUTO mode is selected, monitor prop
ammeter for 90 seconds and ensure indicator
remains in normal range entire time.
NOTE
Windshield heat thermostat will invalidate
check in OAT above 20 to 30C.
2. WSHLD ANTI-ICE -- Check. Note increases
on loadmeter and cycle through both
NORMAL and HI settings.
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.
3. LEFT BLEED AIR VALVE -- ON.
a. Pneumatic and suction pressure returns
to normal.
b. Both BL AIR FAIL annunciators
extinguished.
c. L BL AIR OFF annunciator extinguished.
4. RIGHT BLEED AIR VALVE -- ON.
a. R BL AIR OFF annunciator extinguished.
P-18 Change 1
