REPLACE BUSHINGS IN FORWARD ENGINE MOUNT LUGS (AVIM)
This task can be used to replace
bushings in lugs on No. 1 or No. 2
engine mount support. Only bushings
in lugs on No. 1 engine mount support
are shown here.
REPLACE SHOULDER BUSHING
It may be necessary to apply carbon
dioxide (E92) to bushing area for
easier removal of bushing.
Remove shoulder bushing (1) from engine mount
lugs (2) and (3).
Ream lug (2) in line with other lug (4). Make a
round hole (5) with an inside diameter (6) no
larger than 0.9844 inch.
On some helicopters, the original
spotface diameter (7) is 1.38 inches.
Do not increase this diameter.