5-45 100-Hour / Annual Maintenance and Inspection [19 of 26 Pages]
TAIL ROTOR & TAIL ROTOR GEARBOX (continued)
Empennage:
Inspect condition. Verify no nicks, scratches, dents, cracks, corrosion, fretting, or
loose rivets on skins or near attachment points. Check tail rotor skid for evidence of
tail rotor or tail rotor skid strike. Refer to § 5-61 for tail rotor skid strike inspection
criteria. Verify no obstructions in lower vertical stabilizer and skid drain holes. Verify
proper installation and security.
Aft Navigation Light:
Inspect condition. Verify no cracks where aft navigation light mounts to empennage.
Verify lens cleanliness, clarity, and security. Verify proper operation.
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.
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. 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.
MAY 2015 Chapter 5 Inspections Page 5.31
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