TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
b. Pneumatic pressure gage -
Check. Pressure should drop to
zero.
c. Bleed air warning lights -
Check illuminated.
NOTE
Setting either bleed air valve switch to the
PNEU AND ENVIRO OFF position will
cause the bleed air warning lights to extin-
guish.
d. Cabin altitude controller - Set
500 feet lower than field eleva-
tion.
e. Cabin pressurization rate con-
trol - Set to maximum.
f. Cabin pressurization switch -
TEST (hold).
g. Left bleed air control valve
switch - OPEN.
h. Cabin climb indicator - Check
for descent indication within
10 to 15 seconds, then release
test switch.
i. Repeat the above procedure for
the right bleed air control
valve.
j. Left and right bleed air valve
switches - OPEN.
k. Cabin altitude indicator - Set
to 1800 feet pressure altitude.
l. Rate control - Set.
2-33
