5-45 100-Hour / Annual Inspection (continued)
MAIN ROTOR GEARBOX COMPARTMENT (continued)
C947-3 (Tail Rotor Drive) Plate Assemblies, Forward and Intermediate:
Refer to Figure 5-4A. Inspect condition. Verify no distortion, nicks, scratches,
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 § 79-11. Verify proper installation,
security, and operating clearance. Verify no cracks or damage to scroll assembly.
Emergency Locator Transmitter (ELT; if installed):
Inspect condition. Comply with 14 CFR § 91.207 (d), if required. Verify proper
installation, security, and clearance from drive train components. Verify D693-4
strap assembly is installed and buckled securely.
Pitot Line & Static Vent:
Inspect pitot and static lines for obstructions, cracking, chafing, pinching or kinking.
Verify integrity of pitot and static line connections. Verify line security.
Horizontal Firewall:
Inspect condition. Verify no deformation, buckling, wrinkling, nicks, scratches,
dents, cracks, corrosion, fretting, or loose rivets. Verify no leakage from fuel tanks.
Wiring:
Inspect condition. Verify no loose, chafed, or broken wires or terminals. Verify
neatness, proper routing and installation, and security.
Fasteners & Torque Stripes:
Inspect condition. Verify proper installation and security of fasteners. Renew
deteriorated torque stripes per Figure 5-1.
Antennas:
Inspect condition. Verify no cracks where antennas mount to cowling. Verify security.
Cowling Doors:
Inspect condition. Verify proper operation of fasteners.
F910-1 (Main Rotor Drive) Yoke:
Inspect condition. Verify no cracks, corrosion, or fretting. Verify proper installation,
security, and operating clearance.
JUL 2020 Chapter 5 Inspections Page 5.23
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