5-45 100-Hour / Annual Inspection (continued)
MAIN ROTOR GEARBOX COMPARTMENT (continued)
Hydraulic Servos:
Inspect condition. Inspect rod ends per § 5-33. Verify approximately 0.040 inch
total free play at servo valve input. Verify no significant servo leakage. Clean servo
input rod end/clevis area with no-residue, non-alcoholic solvent as required. Verify
no obvious defects and security of scissors at upper clevis of servos. Verify proper
installation and clearance from surrounding structure through full control travel.
CAUTION
Use LPS PreSolve to clean hydraulic parts. Do not use alcohol.
Hydraulic Hoses, Lines, & Fittings:
Inspect condition. Verify no leakage, chafing, or obvious damage to hydraulic lines.
Verify integrity of connections. Verify fluid line clearance to installed equipment and
surrounding structure and sufficient fluid hose slack available through full control
travel. Verify proper installation and security.
Hydraulic Pump:
Inspect condition. Inspect Telatemp per § 5-35. Verify no significant leakage.
Verify proper installation and security.
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 § 21-21.
APR 2019 Chapter 5 Inspections Page 5.21D
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