THRUSH S2R – G10 Maintenance Manual page 68

AIRPLANE MAINTENANCE MANUAL
Model Number
Used On Engine Type
Diameter (inches)
Diameter (inches)
Measurement Station
(inches)
Start Lock Blade Angle
(degrees)
Flight Idle Blade Angle
(degrees)
Feathered Angle (degrees)
Reverse Angle (degrees)
* NOTE *
The beta tube lock cannot be
removed from the propeller in the
feathered position. Do this from the
start lock position.
Checking and adjusting the flight idle blade
angle requires taking the blades off the
start locks to the feathered position. To
accomplish this, move the power lever to
the full reverse position and turn on the
feathering pump to move the blades off the
start locks. Insert McCauley tool P/N
B5021 (Figure 4-2) into the four holes of
the propeller hub.
unfeathering pump and pull the emergency
cutoff lever. The blades will move under
spring pressure to the feather position.
Remove the P/N B5021 tool.
alternate method, or, if hot engine is
required, start the engine in accordance
Effective: 03/26/2010
THRUSH AIRCRAFT INC - MODEL S2R-G10
PROPELLER
Hartzell 4-
blade
HCB4TN-5NL-
LT10890N
TPE331-10
max. 109.5
min. 107.5
42
-1.4±0.1
4.5±0.2
81.2±0.5
-6.0±0.5
Figure 4-1: Propeller Specifications
Turn off the
As an
McCauley 4-
blade
4HFR34C653-[X]
[X]-L106FA-0
TPE331-10
106.0
105.0
30
6.0±0.2
12.0±0.5
87.4±0.2
-4.0±0.2
with normal start procedures. When ready
to shut down the engine, briefly pull the
power lever into reverse to release the
start locks and return to ground or flight
idle. Actuate the fuel shutoff switch with
the power lever in ground idle or flight idle.
The blades will feather under spring
pressure as the oil pressure decreases.
With the propeller protractor previously
zeroed in the propeller hub and with the
prop in the feathered position, move to the
face of the blade to be measured. Be sure
that the power lever is in the flight idle
position and the prop pitch servo valve is
pinned at 40º with a 1/8" diameter drill bit
or rigging pin. Verify the proper feathered
angle at this time.
If the propeller installation is new or if the
beta tube has been removed or disturbed,
install the beta tube into the housing.
McCauley 4-
blade
4HFR34C662-[X]
[X]-L108FA-0
TPE331-10
108.0
105.0
30
6.0±0.2
12.0±0.5
87.4±0.2
-4.0±0.2
4-7
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