5-45 100-Hour / Annual Maintenance and Inspection [13 of 26 Pages]
INTERMEDIATE STAGE & SCROLL ASSEMBLY (continued)
Emergency Locator Transmitter (ELT; if installed):
Inspect condition. Verify proper installation, security, and clearance from drive train
components. Comply with 14 CFR § 91.207 (d), if required.
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. Inspect weld for cracks
or corrosion. Verify proper installation, security, and operating clearance.
A947-2 (Main Rotor Drive) Plate Assemblies:
Inspect condition. Inspect flex plate for 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.
F642-1 (Engine) Shaft Weldment:
Inspect condition. Verify 0.2 inch minimum clearance between shaft weldment and
firewall grommet; verify equal gap concentrically between shaft and box assembly
hole edges. Adjust F174-1 support weldment rod ends per § 53-31 as required.
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.
Engine Firewall:
Inspect condition. Verify no deformation, buckling, wrinkling, nicks, scratches,
dents, cracks, corrosion, fretting, or loose rivets. Verify no leakage from fuel tanks.
Engine Oil Tank:
Inspect condition. Verify no leakage or obvious damage to oil tank exterior. Check
tank interior for foreign objects. Add oil as required per R66 POH Section 8. Verify
tank security.
MAY 2015 Chapter 5 Inspections Page 5.25
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