BHT-206A/B-SERIES-MM-1
5-00-00
Page 164 Rev. 14 30 APR 2013
Export Classification C, ECCN EAR99
3. Remove the following components and visually inspect for
evidence of torsional yielding, deformation, cracks, or other
obvious damage that would render them non-repairable. Unless
otherwise specified, conduct an overhaul of these components.
If main rotor mast was severed during main rotor
sudden stoppage/acceleration, main rotor hub
assembly must be considered unserviceable and
scrapped.
BHT-206B3-CR&O,
Chapter 62
a. Main rotor hub assembly in accordance with the
conditional inspection criteria.
If main rotor mast was severed during a main rotor
sudden stoppage/acceleration, the main rotor mast
has sustained torsional yielding.
BHT-206A/B/L-Series
-CR&O, Chatper 63
b. Mast assembly
(1) Concurrently with mast assembly overhaul,
accomplish the following inspections:
(a) Check mast for torsional yielding by
measuring the offset between the mast splines above and
below the main rotor trunnion split cone groove using either of
the following methods:
• Sliding a 0.1600 inch (4.06 mm) diameter measuring
pin across the upper and lower spline
• Sliding a straight edge across the upper and lower
unworn face of the spline (coast side of the spline)
5-53. SUDDEN STOPPAGE/ACCELERATION — MAIN ROTOR — POWER ON OR OFF (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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