TM 1-1510-218-CL
P-11
3. DEICE switch – SINGLE CYCLE AUTO. Check
for a drop in pneumatic pressure and wing-deice
boots inflation and after 6 seconds for a second
drop in pneumatic pressure.
PNEUMATIC SYSTEM
1. LEFT BLEED AIR VALVE switch – OFF.
2. Pneumatic pressure 12 to 20 psi – Check.
3. L BL AIR OFF light on – Check.
4. RIGHT BLEED AIR VALVE switch – OFF.
5. L & R BL AIR OFF, L & R BL AIR FAIL lights
and MASTER WARNING light – ON.
6. LEFT BLEED AIR VALVE switch – OPEN.
7. L BL AIR OFF and L & R BL AIR FAIL lights –
OFF and pneumatic pressure at 12 to 20 psi
Check.
8. RIGHT BLEED AIR VALVE switch – OPEN.
9. R BL AIR OFF light off – Check.
PRESSURIZATION SYSTEM
1. CABIN DOOR caution light extinguished –
Check.
2. Vent windows closed – Check.
3. BLEED AIR VALVE switches – OPEN.
4. Cabin altitude 500 feet lower than field pressure
altitude – Set.
5. CABIN PRESS switch – TEST (hold).
6. CABIN CLIMB gauge descending indication –
Check, then release TEST switch.
