BHT-212-MM-1
5-00-00
Page 40 Rev. 14 26 JUN 2013 Export Classification C, ECCN EAR99
Chapter 64 TAIL ROTOR HUB AND BLADE ASSEMBLY
COUNTERWEIGHT BELLCRANK RETENTION
NUTS P/N MS14145L6 OR ITS EQUIVALENT
MS17826-6 ARE DESIGNATED AS ONE TIME USE
ONLY. IF MAINTENANCE ACTION REQUIRES
THAT IT BE REMOVED, THE COUNTERWEIGHT
BELLCRANK NUT IS TO BE DISCARDED AND
REPLACED WITH A NEW NUT. OVERTORQUING
OR INCORRECT APPLICATION OF THE NUT
COULD CAUSE MECHANICAL FAILURE
RESULTING IN EXCESSIVE VIBRATION OR
DAMAGE TO THE TAIL ROTOR BLADES.
1. Inspect the tail rotor counterweight bellcrank (P/N
212-011-705-001) retention nuts for cracks, corrosion, and
security. Reapply corrosion preventive compound (C-101) if
nuts are not completely covered.
Every third 100 hour inspection (300 hours) or every 12
months:
Chapter 18 1. Dynamically balance tail rotor.
2. Torque check nuts on tail rotor blade retention bolts.
3. Torque check tail rotor retaining nut.
Chapter 65 TAIL ROTOR GEARBOX
1. Inspect chip detector for debris. If metallic particles are
found, determine and correct cause.
2. Clean chip detector.
3. Test chip detector electrical circuit.
5-9. 100 HOURS/12 CALENDAR MONTHS — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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