TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
c.
Condition levers - HIGH IDLE.
d.
Bleed air valve switches (2) - PNEU AND ENVIRO OFF.
e.
Pneumatic pressure gauge -Check. Pressure should drop to zero.
.
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
extinguish.
g.
Cabin altitude controller - Set 500 feet lower than field elevation.
h.
Cabin pressurization rate control - Set to maximum.
i.
Cabin pressurization switch - TEST (hold).
j.
Left bleed air control valve switch - OPEN.
k.
Cabin climb indicator - Check for descent indication within 10 to 15 seconds, then release test switch.
1.
Repeat the above procedure for the right bleed air control valve.
m. Left and right bleed air valve switches - OPEN.
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