TM 55-1520-240-23-4
5-23.1.1
INSPECT TIE-BAR AND PIN ASSEMBLIES
5-23.1.1
INITIAL SETUP
Applicable Configurations:
All
Tools:
Aircraft Maintenance Tool Kit, NSN 5180-00-323-5114
Materials:
Solvent (E162)
Cloth, Cleaning (E120)
Gloves (E186)
Goggles (E473)
Personnel Required:
Aircraft Powertrain Repairer
Inspector
Equipment Condition:
Off Helicopter Task
WARNING
Dry cleaning solvent (E162) is
flammable and toxic. It can irritate
skin and cause burns. Use only in
well-ventilated area, away from heat
and open flame. In case of contact,
immediately flush skin or eyes with
water for at least 15 minutes. Get
medical attention for eyes.
1.
Clean tie-bar assembly (1). Use cloths (E120)
damp with solvent (E162). Wear gloves (E186)
and goggles (E473).
2.
Visually inspect the entire assembly:
a.
Using 10X magnification, visually inspect
tie-bar plates for cracks. No cracks allowed.
b.
There shall be no scores or scratches in
bores (2).
c.
There shall be no buckling, separation of
plates, or scratches across lug areas (3).
d.
There shall be no more than 15 scratches in
plates along span (4). No scratch shall have
a depth over 0.001 inch. No scratch shall
extend to the radius at the end of the slots.
Transverse scratches allowable to maximum
depth of 0.001 inch.
e.
Separation of plates along span (4) is
permitted.
f.
There shall be no sharp edges on plates.
g.
Inspect washers for deformation (dishing)
and cracks. A dished washer will have a
gap between it and the adjacent plate. The
maximum separation between the washer
and the adjacent plate is 0.015 inch. No
cracks allowed.
Change 2
5-121
