BHT-412-MM-2
5-00-00
01 JUN 2018 Rev. 26 Page 73
Export Classification C, ECCN EAR99
b. Gearbox for proper oil level and oil for evidence of
contamination.
Chapter 64 13. Tail rotor hub and blade assembly:
NO CRACKS ARE PERMITTED ON ANY
SURFACE OF THE TAIL ROTOR BLADES.
a. Tail rotor blades for condition of bond lines, cracks,
corrosion, leading edge erosion, damage, security, and
cleanliness. Clean blades are required to maintain enhanced
visibility for safety.
b. Tail rotor hub for security, corrosion, and condition.
c. Flapping bearings and pitch change bearings for
excessive looseness and freedom of movement through full
range of travel with antitorque pedals positioned full right and
then full left.
d. Tail rotor pitch change links, crosshead, pitch horns,
counterweight arms, and links for security, corrosion, and
condition.
e. Pitch link bearing and counterweight link bearing
looseness shall not exceed 0.015 inch (0.381 mm) axial. Check
freedom of movement through full range of travel with
antitorque pedals positioned full right and then full left.
f. Pitch change links for binding with tail rotor blade
moved to both full flapping positions. Binding is not acceptable.
14. Every fourth 25 Hour/30 Day inspection:
5-9. 25 HOUR/30 DAY INSPECTION — PART B (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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