TM 55-1520-240-23-5
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INSTALL AFT TRANSMISSION
(Continued)
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INSTALL NUTS
13.
Align four mounting holes in transmission (1)
with bolts (8). Have helpers raise transmission
over bolts.
NOTE
Refer to Task 1-13, step 8, for re-use
of self-locking nuts.
14.
Install four chamfered washers (18) and new
nuts (19) on bolts (8). Tighten nuts as much as
possible with socket wrench handle.
FLIGHT SAFETY PARTS
This is an installation critical flight
safety part. All aspects of its assembly
and installation must be ensured.
After the four nuts (19) are tightened
to the bolts (8) with a socket wrench,
ensure the four nuts (19) are torqued
to 620 foot-pounds to the bolts (8).
This ensures proper distribution of
flight loads through the structure.
If the torque requirements are not
met, the bolts (8) can disengage and
allow the transmission to separate
from the aircraft structure.
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