5-45 100-Hour / Annual Inspection (continued)
ROTOR HUB & MAIN ROTOR BLADES
Hub:
Inspect condition. Verify no nicks, scratches, gouges, dents, cracks, or corrosion.
Verify no brown or black residue indicating bearing wear. Verify proper installation
and security.
Hinge Bolts:
Inspect condition. Check blade hinge friction by lifting blades until spindle tusks clear
droop stops. Hold one blade level and cone opposite blade; rotor hub should not teeter
as blade is coned. Repeat check on opposite blade. Verify cotter pins are properly
installed and secure. Verify bolt heads and nuts are torque striped to thrust washers.
Pitch Links & Rod Ends:
Inspect condition. Inspect rod end bearings per § 5-33; verify rod ends are centered
and palnut and jam nut are tight. Check witness holes for proper thread engagement.
Verify security of rivet in pitch link barrel. Verify no corrosion of pitch link assembly.
Verify proper installation of safety wire and hat washers. Inspect condition of
mandatory spacers contacting lower rod end bearings. Verify proper installation,
security, and operating clearance.
Blade Spindles & Root Fittings:
Inspect condition. Verify no cracks, corrosion, or obvious damage to blade spindles
and horns. Verify no cracks, corrosion or missing paint in blade root fittings, especially
in area adjacent to inboard edges of skin and doublers.
Blade Boots:
Inspect condition. Verify no boot defects, tears, material deterioration, or pinholes
resulting in oil leakage. Verify proper boot position and security. Verify sufficient
clearance from hub assembly through full control travel.
Fasteners & Torque Stripes:
Inspect condition. Verify proper installation and security of fasteners. Renew
deteriorated torque stripes per Figure 5-1.
Main Rotor Blade Tip Maintenance:
Perform main rotor blade tip maintenance per § 62-60.
Blade Inspection and Care:
Refer to § 62-40. Inspect skins and doublers for scratches and corrosion. Inspect
blades for dents, local deformations, and voids. As required, wax blades with soft
cleaning cloths using carnauba-type wax (such as SC Johnson® Paste Wax). Ensure
tip cover and blade tip drain holes are unobstructed. Verify placard legibility and
remove old tracking tape and/or residue.
WARNING
Structural damage may occur if compressed air is applied to
blade tip drain holes.
Page 5.34 Chapter 5 Inspections JUL 2020
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