TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
ENGINE RUNUP (CONT)
e. AIR COND N1 LOW light
should extinguish.
*9. Pneumatic pressure - Check as fol-
lows:
a.
Condition levers - HIGH
IDLE.
b. Power levers - IDLE.
c. Left bleed air valve switch -
PNEU & ENVIRO OFF.
d. Pneumatic pressure - Check 12
to 20 PSI.
e. Left bleed air off light - Check
illuminated.
f. Right bleed air valve switch -
PNEU & ENVIRO OFF.
g. Left and right bleed air off
lights - Check illuminated.
h. Left and right bleed air fail
lights - Check illuminated.
i. Left bleed air valve switch -
OPEN. Check L BL AIR OFF
and L&R BL AIR FAIL lights
off. and pneumatic pressure at
12 to 20 PSI.
j. Right bleed air valve switch -
OPEN.
k. Right bleed air off light - Check
extinguished.
*10. Pressurization system - Check as
follows:
a. Bleed air valve switches (2) -
PNEU AND ENVIRO OFF.
2-32
