BHT-412-MM-2
5-00-00
Page 202 Rev. 26 01 JUN 2018
Export Classification C, ECCN EAR99
b. Tail rotor driveshaft hanger assemblies:
(1) Remove hanger assemblies from helicopter and
disassemble as required to allow visual inspection for
indications of sudden stoppage. Any indication or damage
found will require overhaul of the hanger assemblies. Make an
entry in component records to show reason for removal is a
sudden stoppage.
(2) If tail rotor driveshaft has been damaged beyond
the limits specified in Chapter 65 due to contact with main rotor
blade or any other similar circumstances other than torsional
overload, overhaul the hanger assembly that the driveshaft was
attached to. If a tail rotor driveshaft is visibly twisted, all hanger
assemblies and shafts shall be overhauled. Make an entry in
the components records to show reason for removal is a
sudden stoppage.
(3) If any driveshafts fails because of torsional
overload, remove and scrap all hanger assemblies and
driveshaft.
c. Tail rotor driveshafts:
(1) Removal tail rotor driveshafts and inspect them for
the following conditions. If one or more conditions listed in step
(a) through step (d) below are noted, all hanger assemblies and
driveshafts shall be overhauled. Make an entry in the
component record to show that reason for the removal is
sudden stoppage.
(a) Inspect driveshaft curvic faces for distortion.
(412 and 412SP only).
(b) Inspect driveshaft for bends, twisting, out of
roundness exceeding limits specified in Chapter 65.
(c) Inspect driveshaft for cracks.
(d) Inspect driveshaft for loose or shear rivets.
5-38. SUDDEN STOPPAGE — POWER ON OR OFF (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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