5-45 100-Hour / Annual Inspection (continued)
TAIL ROTOR & TAIL ROTOR GEARBOX (continued)
Pitch Control Bearing Assembly & Aft Bellcrank:
Inspect condition. Verify pitch control assembly has less than 0.25 inch rotational
play measured at pitch link attach bolt. Verify no leakage at bearing seals. Verify
no nicks, scratches, dents, cracks, or corrosion on pitch control housing or bellcrank.
Inspect bellcrank spherical bearings per § 5-33. Inspect spherical bearing atop stud
protruding from underside of pitch control for cracks. Verify proper installation,
security, and smooth actuation without binding.
NOTE
B345-4 tail rotor pitch links can have different shaft diameters
(0.250 inch or 0.300 inch). Balance tail rotor per § 18-20 if a
different shaft diameter pitch link is installed.
Pitch Links:
Inspect condition. Inspect rod ends per § 5-33. Remove and reinstall pitch links
with outboard end inboard and inboard end outboard as required to obtain maximum
service life; additionally, an optional A215-012 o-ring may be installed between
A214-3 washer and A115-1 spacer at pitch control. Reinstall chordwise weights at
respective attachment points for balance purposes. Verify proper installation of hat
washers. Verify proper installation, security and operating clearance.
Tail Rotor Blades:
Inspect condition. Inspect blade surfaces for excessive erosion, nicks, scratches,
buckling, voids or debonding, dents, cracks, or corrosion. Refer to § 64-30 for tap
testing instructions and damage limitations. Verify no fretting of tail rotor blade root
fitting bearings. Inspect bearings per § 5-33. Verify no obstructions in blade tip drain
holes. Verify proper installation, security, and pitch change operation.
WARNING
Structural damage may occur if compressed air is applied to
blade tip drain holes.
Tail Rotor Hub:
Inspect condition. Verify no nicks, scratches, gouges, dents, cracks, or corrosion.
Inspect elastomeric teeter bearings per § 5-34. Teeter rotor hub and verify teeter
bearing bolt, spacers, and nuts do not rotate. Verify hub teeters smoothly. Verify
proper installation and security of blade bolts.
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.
JUL 2020 Chapter 5 Inspections Page 5.31
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