BHT-412-MM-2
5-00-00
Export Classification C, ECCN EAR99
5. When overtorque has exceeded 112% (110% mast torque
for helicopters S/N 36020 through 36999 and 37002 through
37999, and helicopters modified by 412-570-001-103 or Post
BHT-412-SI-74 (412SP to 412HP Upgrade):
a. Return the following components to an overhaul facility
for overhaul evaluation.
Component removal record of dynamic components
shall reflect overtorque as reason for removal.
(1) Transmission
(2) Main driveshaft
(3) Main rotor hub
(4) Mast
b. Perform thorough visual inspection of other
components outlined in step 3.
5-40. AFTER OVERTORQUE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
15 DEC 2015 Rev. 23 Page 211/212
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