Propeller Csu High Rpm Adjustment; Propeller Overspeed Governor Removal; Propeller Overspeed Governor Installation - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

Table of Contents

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH

Secure the front clevis end to the propeller reversing lever with the attaching

spacer, bolt, washers, castellated nut and cotter pin.

Secure the Nf governor-interconnecting rod to the Nf governor reset arm with the

attaching bolt, washer, castellated nut and cotter pin.

Secure the governor speed select lever to the propeller speed control cable with

the attaching bolt, washer and nut.

Ensure the governor's stop plate contacts both the high RPM stop screw and the

feathering stop screw, when the propeller control lever in the cockpit is operated.

Ensure that there is sufficient cushion at both positions on quadrant. If linkage will

not allow proper travel, adjust the control linkage at either rod end or move speed

select lever on the governor to obtain necessary travel.

Connect coupling nut of the pneumatic (Py) front tube to propeller governor.

Tighten nut; torque to 90 to 100 lb. in., and lock wire.

Check engine front linkage rigging.

Accomplish propeller governor operational checks in accordance with the

appropriate Pratt & Whitney Maintenance Manual.

Install the forward engines cowling.

If a high RPM adjustment is required, turn the high RPM stop screw on the governor

head clockwise to decrease or counter clockwise to increase RPM as required to obtain

1,700 RPM propeller speed (NP). After adjustment, ensure there is sufficient cushion at

both the feathered and high RPM positions at the propeller lever on the throttle

quadrant. Lock wire the high RPM stop screw after adjustment.

PROPELLER OVERSPEED GOVERNOR REMOVAL

Remove the forward engines cowling.

Remove the safety-wire and disconnect the electrical plug from the governor

solenoid valve.

Remove the four self-locking nuts and plain washers securing the governor and

remove the governor from the left side of the reduction gear housing.

PROPELLER OVERSPEED GOVERNOR INSTALLATION

Install a new gasket on the mounting pad.

Apply clean engine oil to the governor splined drive.

Position the governor on the mounting pad and install the four plain washers and

self-locking nuts. Apply a torque of 125 to 135 inch-pounds to the mounting nuts.

(Make sure you have the two ground wires under one of the nuts.)

Connect the electrical plug to the governor solenoid valve.

Reinstall the forward cowling.

Perform over speed governor check (prop test).

Effective: 05/05/04

AIRCRAFT MAINTENANCE MANUAL