5-45 100-Hour / Annual Maintenance and Inspection [15 of 26 Pages]
ENGINE (continued)
Engine Hoses:
Inspect condition. Verify no rips, holes, or collapsed areas. Verify proper installation
and security.
Exhaust Pipe:
Inspect condition. Verify no cracks near welds at angle where weldment attaches
to exhaust collector. Verify no cracks in struts or near strut welds where exhaust
gases exit pipe. Inspect condition and security of F173-1 struts; verify no cracks
near welds where struts attach to support ears. Inspect condition and security of
gearbox vent and clamps.
Starter-Generator & Wiring:
Inspect condition. Verify no loose, chafed, frayed, or broken wires. Verify no
damaged connectors. Verify neatness, proper routing and installation, and security.
Engine Oil and Oil Filter:
Add oil as required per R66 POH Section 8. Change oil and oil filter as required per
RR300 OMM. Verify filter security.
Oil Lines:
Inspect condition. Verify no leakage where lines connect to tank. Verify no leakage,
chafing, or obvious damage to oil lines. Verify line clearance to installed equipment
and surrounding structure. Verify security.
Cooling Duct and Oil Coolers:
Verify installation security with no cracks in duct or mounting. Verify cooler line
connections are tight and coolers have no nicks, dents, cracks, or corrosion. Verify
duct and cooler cores are free of debris to allow full airflow.
Fuel Control Unit (FCU) and Control Rigging:
Verify proper routing and security of throttle and fuel cutoff controls; verify smooth
actuation of both controls without binding. Verify FCU throttle arm contacts idle
stop with twist grip closed and contacts maximum throttle stop with twist grip open.
Verify FCU cutoff lever rests in detent when control is OFF and has 0.030-0.090
inch clearance from maximum fuel stop when control is ON.
Fuel Filter:
Inspect condition; service fuel filter per RR300 OMM, as required. Verify proper
installation and security of wiring and housing.
Fuel Hose:
Inspect condition. Verify no leakage, chafing, or obvious damage to fuel lines. Verify
line clearance to installed equipment and surrounding structure. Verify security.
MAY 2015 Chapter 5 Inspections Page 5.27
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