5-45 100-Hour / Annual Inspection (continued)
ENGINE (continued)
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.
Power Turbine Governor (PTG) Control:
Refer to Figure 76-2. Verify D333-13 fitting in PTG input lever moves in and out
slightly with light finger pressure. If D333-13 fitting does not move in response to
light finger pressure then follow compliance procedure in R66 Service Bulletin SB-01.
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.
Fuel Flow Meter Transducer (if installed):
Refer to § 28-23. Visually inspect fuel control unit-to-transducer fuel tube connections,
transducer, and reducer connections to transducer and check valve for evidence
of leakage. Visually inspect components for any obvious damage; verify proper
installation and security. Verify no damaged connectors. Verify wiring neatness,
proper routing and installation, and security.
Firewalls:
Inspect condition. Verify no deformation, buckling, wrinkling, nicks, scratches,
dents, cracks, corrosion, fretting, or loose rivets. Pay particular attention to structural
attachment points. Inspect condition of engine-to-firewall seal. Verify no open holes.
WARNING
Open holes in engine-to-firewall seals are potential fire leak paths.
Page 5.28 Chapter 5 Inspections JUL 2020
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