TM 55-2840-231-23
9-6. Compressor Bleed Valve - Testing - Continued
AIRFRAME/ - Continued
b. With the bleed valve closed.
friction collective and reduce
throttle to engine idle. Let N2
stabilize. Observer should check
that bleed valve is fully open.
C. Slowly increase throttle until
observer indicates bleed valve
starts to close record N1.
d. Coontinue to increase throttle
until observer indicates bleed
valve is fully closed record N1.
Bleed valve should start closing on or above the
e. Collective - down, friction
lower line of unshaded area and be fully closed on off.
or below the upper line of the unshaded area of the
bleed valve operation chart below.
AMBIENT TEMPERATURE
After testing retain the standard elbow fitting
(3) [for OH-58 aircraft], or reinstall the jet
assembly [(4) for OH-6A aircraft], and
Connect all Pc lines.
9 -
8
Change 13
