Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual page 27

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
4. Remove the chip detector (Figure 2-8, #3) from the six o'clock position on
the reduction gearbox front case. Discard the preformed packing.
5. Visually examine the drained oil for the presence of foreign matter.
E. Refill the oil tank by accomplishing the following procedures.
1. Install the chip detector with new preformed packing on the reduction
gearbox. Torque chip detector body 45 to 55 lb. in. and lock wire.
2. Install rear case drain plug with new preformed packing in the accessory
gearbox housing. Tighten and torque to 215 to 240 lb. in. and lock wire.
3. Install the drain plug with the new preformed packing in the bottom of the air
inlet case and lock wire. Install a cap on the drain port on the left shin skin
(on aircraft equipped with quick drain) and lock wire.
4. Fill the oil tank with the specified oil to the level of maximum graduation on
the dipstick.
F. Install the filler cap and dipstick assembly in the oil tank. Ensure that the cap is
locked securely.
1. Start the engine and run at idle for approximately 2 minutes to circulate the
oil through the system.
2. Feather the propeller.
3. Shut down the engine.
4. Check the oil level in the tank. Replenish, as required, to the normal level
on the dipstick.
5. Install the filler cap and dipstick assembly in the oil tank. Ensure that the
cap is locked securely.
G. If an engine is to be operated with an oil brand or type that differs from that on
which it previously operated or if the oil system has been contaminated by other
than metallic matter, the oil system should be flushed by following the steps
below:
1. Place suitable containers or drip pan under the engine.
2. Remove the oil drain plug or chip detector from the reduction gearbox and
the plugs from the inlet case and the accessory gearbox housing.
Limit the engine rotation to the minimum which
is required to accomplish the complete draining.
Also observe the starter operating limitations.
3. With the drains open, place the starting control lever to cutoff and the
ignition switch to off. Motor the engine with the starter only to allow the
scavenge pumps to clear all lubricating oil.
4. Reinstall all drain plugs and the chip detector.
5. Refill the engine oil tank with new type oil.
2-10
AIRCRAFT MAINTENANCE MANUAL
** CAUTION **
Effective 05/05/04