Beta & Reverse Lockout; Fuel Shutoff Lockout; 1600 Rpm Np Torque Setting - Thrush Aircraft S2R–T660 Maintenance Manual

GROUND OPERATION PROPELLER PITCH STOP
Provides positive method to keep out of the propeller's ground operation RPM restrictions. (NOTE:
This stop is adjusted at the factory by controlling the length of the latch's pawl and should not
require field adjustment. If adjustment is necessary, file the end of the pawl to adjust length, to
obtain below said specifications.)
For PT6A-45, and -60AG, engines with model HC-B5MP-3C/M10876AS or ANS propellers adjust
the ground operation propeller pitch stop to restrict propeller rpm to 1170 or below.
For PT6A-67AG with model HC-B5MA-3D/M11276NS propeller adjust the propeller pitch stop to
restrict propeller RPM to 1210-1250 RPM.
BETA & REVERSE LOCKOUT
Provides a positive lock to prevent unintentional movement of the power lever into beta or reverse
mode.

FUEL SHUTOFF LOCKOUT

Provides a positive lock to prevent unintentional movement of fuel control lever to the fuel cut off
position.

1600 RPM Np TORQUE SETTING

The 1600 Np torque setting is adjusted using the three beta nuts on the propeller. Refer to Figure 4-
5 when following the steps below.
Effective: 01/10/05
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
A. 1170 to 1400 RPM Np is prohibited on Ground.
B. Stabilized operation below 900 RPM Np is
prohibited – Except in feathered operation from 0 to
400 RPM Np.
A. Stabilized ground operations is prohibited above
1600 RPM except when the aircraft is headed into
the wind. For downwind takeoffs advance above
1600 RPM only after brake release.
B. 1050 to 1200 RPM Np is prohibited on Ground.
C. Stabilized operation below 900 RPM Np is
prohibited – Except in feathered operation from 0
to 400 RPM Np.
*NOTE*
*NOTE*
4 – 32
R1