TM 1-1510-223-CL
P-27
3.
Cabin pressurization RATE control – Set to
maximum.
4.
ENVIRO & PNEU BLEED AIR valve
switches (2) – ENVIRO & PNEU off.
5.
Pneumatic pressure gage/gyro suction gage
– Check. Pressure should drop to zero.
6.
BL AIR OFF annunciators (2) – Check illumi-
nated.
7.
BL AIR FAIL annunciators (2) – Check illumi-
nated.
8.
CABIN PRESS switch – TEST (hold).
9.
LEFT PNEU & ENVIRO BLEED AIR valve
switch – ON.
10. L BL AIR OFF annunciators – Check extin-
guished.
11. L and R BL AIR FAIL annunciators – Check
extinguished.
12. PNEUMATIC
PRESSURE
gage/GYRO
SUCTION gage – Check in green arc.
13. CABIN CLIMB indicator – Check for descent
indication within approximately 10 - 15 sec-
onds, then release test switch.
14. LEFT PNEU & ENVIRO BLEED AIR valve
switch – Off.
15. Repeat steps 9 through 14 using the right
bleed air valve.
16. CABIN PRESS switch – Set to pressure
position (center).
17. CABIN ALT controller – Reset as required.
18. Cabin pressurization RATE control – Reset
as required.
