5-45 100-Hour / Annual Maintenance and Inspection [12 of 25 Pages]
MAIN ROTOR GEARBOX COMPARTMENT (continued)
Upper Steel Tube Frame:
Inspect condition. Verify no nicks, scratches, dents, cracks, or corrosion. Verify no
chafing where wires, hoses, or clamps attach to frame. Examine each weld for cracks
with an inspection light and mirror.
CAUTION
Upper steel tube frame is fatigue loaded and therefore susceptible
to fatigue cracks. Inspect all joints thoroughly.
F908-1 (Tail Rotor Drive) Yoke Assembly:
Inspect condition. Verify no cracks, corrosion, or fretting. Verify proper installation,
security, and operating clearance. Verify security of magnets.
G779-1 Pulley (Air Conditioning; if installed):
Inspect condition. Verify no cracks, corrosion, or fretting. Verify no nicks or sharp
edges in fins that could damage v-belt. Verify proper installation, security, and
operating clearance.
V-Belt (Air Conditioning; if installed):
Inspect condition. Replace belt if exhibiting frayed edges, excessive cracking, heat
damage, or rubber deterioration. Verify 4.5-5.5 lb of force applied mid-span deflects
belt 0.16-inch; adjust as required per Section 21-21.
Compressor Assembly (Air Conditioning; if installed):
Inspect condition. Verify security of mounting. Verify no loose, chafed, frayed, or
broken wires. Verify proper installation and security of pressure switches, snubber,
and refrigerant lines.
Refrigerant Hose Assemblies (Air Conditioning; if installed):
Verify security, no damage, and clearance to adjacent structure. Verify dust caps
installed on service fittings where lines mount to compressor.
INTERMEDIATE STAGE & SCROLL ASSEMBLY
F196-1 (Tail Rotor Drive) Fan Shaft:
Inspect condition. Verify no shaft corrosion. Remove any light surface corrosion and
apply wax or suitable corrosion inhibitor. Verify no cracks, corrosion, or fretting in
fore and aft weldment. Verify proper installation, security, and operating clearance.
C947-3 (Tail Rotor Drive) Plate Assemblies, Forward and Intermediate:
Inspect condition. Verify no distortion, cracks, corrosion, or fretting. If fretting is
detected, contact RHC Technical Support. Verify bonded washers are installed on
both sides of each flex plate ear. Verify proper installation, security, and operating
clearance.
Fanwheel Assembly and Scroll Assembly:
Clean fanwheel blades and inspect condition. Verify no cracks, corrosion, or obvious
damage on blade leading edges or fan assembly. Verify 0.10 inch minimum gap
between G174-1 fanwheel assembly and forward and aft F305-5 inlets. Check gap
all the way around; rotate fanwheel and check gap again (several positions). If gap
does not meet minimum limit, trim inlets per Section 79-11. Verify proper installation,
security, and operating clearance. Verify no cracks or damage to scroll assembly.
Page 5.24 Chapter 5 Inspection Schedule R66 Maintenance Manual SEP 2012
To Next Page
Loading...