ing procedure. Type HA cleaners do not require
dilution with water. Both types of cleaners are
less effective than Type I cleaners. Therefore
more frequent engine washes may be required
to achieve satisfactory results.
a. With one compressor case half removed, clean
contamination from the blades using a tooth brush and
a solution of one part cleaning compound (items 39,40,
41,42, table 2-2).
b. Flush with clean water and blow dry with clean
7-7. Compressor Bleed Valve Cleaning.
a. Remove the air sensing line (l, figure 7-l) from the
compressor bleed valve elbow (2).
b. Remove the elbow from the bleed valve, Discard
preformed packing (4).
c. Remove internal retaining ring (5) and separate fil-
lter (6) from the compressor bleed valve. Replace the re-
taining ring before assembly if it is damaged during the
d. Using a screwdriver, remove jet (7) from the com-
pressor bleed valve.
e. Clip the lockwire, then remove nozzle (8) and
strainer (9) from the compressor bleed valve.
f. Clean the nozzle, falter, strainer, and jet ultrasoni-
cally if equipment is available. If ultrasonic equipment
is not available, agitate the parts in a clean container of
solvent (item 3, table 2-2). Use a soft bristle brush to
clean exposed surfaces. Insert a sewing thread through
the jet hole. Slide the jet back and forth on the thread to
remove film. Clean the nozzle in the same manner.
Do not blow the jet dry. The small jet can be
easily lost or damaged.
If the jet must be replaced, return the compres-
sor bleed valve to overhaul for part replace-
ment and recalibration of the valve assembly.
g. Inspect the jet and the nozzle using a flashlight.
Place the part on the center of the lens so the light can
be seen through the hole. Reclean the part if any par-
ticles or coating can be seen.
Do not use a probe to remove particles
lodged in the jet or nozzle. Damage to the jet
or nozzle could result.
h. Install jet (7) in the compressor bleed valve. Tight-
en to 8-12 in. lb.
i. Place filter (6) in the compressor bleed valve (skirt
end first). Secure with internal retaining ring (5).
j. Install strainer (9) and nozzle (8) in the compressor
bleed valve. Tighten to 35-45 in. lb. and secure with
lockwire (item 10, table 2-2).
k. Lubricate preformed packing (4) with oil (item 7
or 8. table 2-2) and install it with elbow (2) on the com-
pressor bleed valve. Do not tighten the elbow jam nut (3)
at this time.
l. Position the elbow as required and install air sens-
ing line (l). Tighten the coupling nut to 80-120 in. lb.
Tighten elbow jam nut (3) to 55-80 in. lb.
Section II. INSPECTION
This section provides instructions for complete in-
spection of engine parts within the scope of the Mainte-
nance Allocation Chart. Service limits and standards are
presented to determine when parts should be repaired or
7-9. Compressor Rotor and Blade Inspection.
Visually inspect the compressor rotor and blades for
the following conditions. Replace the engine if any of
the limits are exceeded.
Honing stone shall he used for any blending.
Use of a file may relieve stresses purposely
placed in new or overhauled compressor
blades, weakening blades and risking pre-
This inspection requires removal of a compres-
sor case half and shall be performed only for
the reasons stated in paragraph 6-2. It is not