TM 1-1520-238-23
11-988
Change 6
SECTION IV.
DIRECTIONAL CONTROL SYSTEM MAINTENANCE
11.232.
DIRECTIONAL CONTROL SYSTEM INSPECTION
11.232.1. Description
This task covers:
Inspection. Tailrotor Swashplate Inspection. -15, -17, -19 and -901 Swashplate Inspection Proce-
dure Prior to Installation. -15, -17, -19 And -901 Swashplate Inspection (10 Hour/14 Day Inspec-
tion Criteria). -15, -17, -19 and -901 Swashplate Inspection (Phase Inspection Criteria).
11.232.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
0.001 - 0.200-inch dial indicator (item 176, App H)
0.0 - 10.0-pound weighing scale (item 272, App H)
Light duty laboratory apron (item 27, App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
Materials/Parts:
Cloth (item 51, App F)
Cloth (item 52, App F)
Methyl propyl ketone (item 125A, App F)
Pad (item 130, App F)
Personnel Required:
67R
Attack Helicopter Repairer
One person to assist
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1500-204-23
TM 1-1520-264-23
TM 55-1500-322-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
11.232.3. Inspection
a. General.
(1) Dents, gouges, scratches, or corrosion in control rods, bellcranks, brackets, supports, idlers, and other
components:
(a) Damage in lug component bore within 1 and 1/2 times bore diameter is not to exceed 10 percent of
material thickness or 0.040 INCH, whichever is less.
(b) Damage in bulkhead or deck attachment area is not to exceed 25 percent of item area and no more
than 20 percent of material thickness after repair.
(2) Cracks in control rods, bellcranks, brackets, supports, idlers, and other components.
(a) If cracks are suspected, perform nondestructive inspection (TM 1-1520-264-23).
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