BHT-412-MM-2
5-00-00
15 DEC 2015 Rev. 23 Page 209
Export Classification C, ECCN EAR99
2. When torque has exceeded 100% for 3 seconds or less,
but has not exceeded 104% (105% mast torque for helicopters
modified by 412-570-001-103 and S/N 36020 through 36999
and 37002 through 37999), with transmission lower spider
204-040-785-003 or 412-040-785-103 installed, then no further
maintenance is required.
If transmission lower spider 412-040-785-101 is
installed, when torque has exceeded 100%, but has
not exceeded 104% (105% mast torque for
helicopters modified by 412-570-001-103, and
S/N 36020 through 36058), perform a thorough
visual inspection of the components listed in the
following step. If inspection does not reveal any
discrepancies or obvious damage, components may
be retained in service.
3. When torque has exceeded 100% for more than
3 seconds, but has not exceeded 104% (105% mast torque for
helicopters modified by 412-570-001-103 and S/N 36020
through 36999 and 37002 through 37999), perform a thorough
visual inspection of the following components. If inspection does
not reveal any discrepancies or obvious damage, components
may be retained in service.
a. Tail rotor blades
b. Main rotor hub
c. Tail rotor hub
d. Intermediate gearbox. Check gearbox for security and
torque check retaining bolts.
e. Tail rotor gearbox. Check gearbox for security and
torque check retaining nuts.
f. Tail rotor driveshafts
g. Tail rotor driveshaft hangers
h. Swashplate
5-40. AFTER OVERTORQUE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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