5-45 100-Hour / Annual Maintenance and Inspection [22 of 26 Pages]
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.
Page 5.34 Chapter 5 Inspections MAY 2015
FIGURE 5-5 MAIN ROTOR BLADE TIP AND TIP COVER
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