5-45 100-Hour / Annual Maintenance and Inspection [5 of 26 Pages]
HORIZONTAL CONTROL TUNNEL (Front seats; continued)
Cyclic Horizontal Torque Tube:
Examine accessible portion with inspection light and mirror. Verify no nicks, scratches,
dents, cracks, or corrosion. Verify no cracks around reinforcement blocks on both
ends of torque tube. Verify proper installation, security, and operating clearance.
Horizontal Push-Pull Tubes:
Examine accessible portion with inspection light and mirror. Inspect condition per §
5-32. Verify no nicks, scratches, chafing, dents, cracks, or corrosion. 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 proper installation,
security, and operating clearance.
Collective Stick Assembly:
Inspect condition. Verify no nicks, scratches, dents, cracks, or corrosion. Verify
no cracks in welds. Verify proper installation, security, and operation of collective
micro switches. Verify security, proper operating clearance, and smooth actuation
of both flight and throttle controls. Verify over center spring holds twist grip full
open or full closed. Verify placard legibility.
Collective Stick Torque Tube:
Inspect condition. Verify no nicks, scratches, dents, cracks, or corrosion.
Collective Boot:
Inspect condition. Verify proper locking function of boot snaps. Verify ty-rap is
properly installed (loosely securing boot around collective stick). Verify no defects,
tears, or material deterioration. Verify security.
Fuel Valve Knob and Guard:
Inspect condition. Verify cable and mounting bezel security. Verify proper adjustment
and smooth operation of valve. Verify guard is present.
Collective Friction & Stop Assembly:
Inspect condition. Verify no nicks, scratches, dents, cracks, or corrosion in stop
assembly. Verify no bending or binding of stop through full control travel, with
and without friction applied. Measure collective friction per § 67-22. Verify proper
installation and security of collective friction lever and stop assembly.
Co-Pilot Removable Collective Stick Assembly:
Remove co-pilot collective stick assembly. Inspect condition. Verify no nicks,
scratches, dents, cracks, or corrosion. Verify no damage to spring pin and safety
wire at coupling. Firmly grasp coupling and rotate twist grip in each direction with
opposite hand. Verify no free play of coupling or spacer relative to torque tube. Install
removable collective stick in helicopter and verify both locking pins engage holes to
secure stick. Verify security, proper operating clearance, and smooth actuation of
both flight and throttle controls. Verify placard legibility.
Co-Pilot Removable Collective Boot:
Inspect condition. Verify proper locking function of boot snaps. Verify ty-rap is
properly installed (loosely securing boot around collective stick). Verify no defects,
tears, or material deterioration. Verify security.
MAY 2015 Chapter 5 Inspections Page 5.17
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