6-14. Fuel Control Max Speed Stop - Check
Fuel Control Max Stop Screw Setting
Fixture, Tool No. 6872482
1. Control Stick
Because engines differ on required-to-run
fuel flow requirements, it may be necessary
to adjust gas producer fuel control maximum
stop to maintain N2 speed of 103% rpm at the
higher power setting. It may also be
necessary to make an N1 adjust during
acceptance testing to meet the requirement
for takeoff power.
The max speed stop setting can be checked
during ground operation of the engine by
first installing a fixture (spacer) between the
throttle lever stop and the max speed stop
screw. The spacer (Fuel Control Max Stop
Screw Setting Fixture 6872482) is sized to
stop the throttle lever at 84% N 1 speed which
is 20% below the 104% max continuous limit
of the engine. Make the max speed stop
setting as follows:
Attach a warning note to
the pilots control stick.
The note shall read:
2. Fuel Control
3. Throttle Lever
Maintenance tool installed
on the fuel control.
Make a match mark
across the serrations of
fuel control throttle lever
and arm for reference in
case the relative index is
disturbed during check.
Remove the throttle lever
retaining nut. Do not
remove the throttle lever.