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FLIGHT CONTROL SYSTEM BEARING/BUSHING REPLACEMENT (AVIM) – continued | Up
TM-1-1520-238-23-7-1 Helicopter Attack AH-64A Apache (NSN 1520-01-106-9519) (EIC: RHA) Manual | Next
FLIGHT CONTROLS – INSPECTION (MAIN ROTOR) – continued |
TM 1-1520-238-23
11-44
Change 7
SECTION II. FLIGHT CONTROLS MAINTENANCE – MECHANICAL
11.5.
FLIGHT CONTROLS – INSPECTION (MAIN ROTOR)
11.5.1. Description
This task covers:
Inspection.
11.5.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
Fluorescent inspection kit (item 138, App H)
0.000 - 0.125-inch dial indicator depth gage (item 145,
App H)
Chemical protective gloves (item 154, App H)
Adjustable air filtering respirator (item 262, App H)
Materials/Parts:
Brush (item 34, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
References:
TM 1-1500-204-23
TM 1-1500-344-23
TM 1-1520-264-23
TM 55-1500-322-24
Equipment Conditions:
Ref
Condition
1.57
Helicopter safed
11.5.3. Inspection
a. General.
(1) Dents, gouges, scratches, or corrosion in control rods, brackets, supports, idlers, and other components.
(a) Damage in 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 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, brackets, supports, idlers, and other components. No cracks allowed.
(a) If cracks are suspected, perform nondestructive inspection (TM 1-1520-264-23).
b. Push-pull rods.
NOTE
Replace excessively worn bearing(s) (para 11.2 or para 11.3).
(1) Straightness must be within 0.030 INCH. Use depth gage.
(2) Gouges not to exceed 0.010 INCH or 10 percent of wall thickness in depth, whichever is less, and 1.0 INCH
in length. Use depth gage.
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