Rigging Fuel Cutoff And Feather - THRUSH S2R – G10 Maintenance Manual

AIRPLANE MAINTENANCE MANUAL

RIGGING FUEL CUTOFF AND FEATHER

Ref. Fig. 4-5 & Fig. 4-6
a. At the fuel shutoff valve, (Fig 4-5)
check to see that index mark (Detail A)
on the actuating shaft is vertical. This
is the automatic
actuating arm may have to be removed
to see the index. With actuating shaft
index vertical, the arm should be
pointed outboard
approximately 45 degrees below level.
b. Adjust the 21712-51 rod assembly at
midrange of available threads on both
ends as in A thru D of throttle quadrant
instructions (above).
c. Connect lower end of -51 rod assembly
to the cutoff valve arm. (Index still at
top)
d. Rotate fuel cutoff valve arm 90 degrees
upward into the manual off detent.
* NOTE *
The -77 and -79 push pull rod
assembly is not connected at this
point.
e. The belcrank clamp bolts for the cutoff
should be loose.
feathering rod assembly slowly aft until
the feather valve is pulled out 3/8 inch
plus or minus 1/16. Hold this position
and tighten the 2 clamp bolts on the
belcrank.
f. Manually rotate the belcrank to move
the fuel valve back to the automatic
position, and check feather valve to be
closed. Cycle back and forth several
times to be sure that feather valve does
not move before the fuel shutoff valve
has rotated at least 45º up from the
automatic position. The feather valve
rod, fuel shutoff rod, or indexing the
shutoff arm/shaft may be adjusted to
achieve this.
g. In the cockpit, pull the emergency cut
off handle full aft and into the locked
Effective: 03/26/2010
THRUSH AIRCRAFT INC - MODEL S2R-G10
position. The
and down
Now move the
(DETENT) position, go back to the
engine.
h. Manually rotate the fuel cutoff/feather
belcrank to the feather position. Adjust
the -79 rod assembly length to permit
the rod end bearing to attach to the
belcrank. Adjustment of the rod ends,
clevis ends or cable position through
the brackets is permitted to achieve
proper operation.
i. Cycle the control from the cockpit while
another technician observes the cutoff
and feather valve operation.
cockpit lever requires moderate but not
excessive force to move, and should
lock positively into the detent with an
over-center feel, particularly going fwd.
There should be at least 1/16 inch but
no more than 3/16 inch of available slot
ahead of the lever when it is in the
normal position.
Figure 4-5:
The
4-13
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