Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual page 26

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
cold oil level is the Maximum Cold mark on the dipstick. The
normal hot level is Maximum Hot mark on the dipstick. A
dipstick reading of 3 will indicate that the system requires 2
U.S. quarts to replenish to normal level if the oil is cold. If the
oil is hot, it will take 3 U.S. quarts to replenish.
4. If the engine is nose high or nose low, compensation must be made to
avoid over or under servicing.
B. If the oil level is too low to register on the dipstick due to possible excessive
consumption or if low or fluctuating pressures have been recorded, refer to
Troubleshooting - Lubrication Problems in the Pratt and Whitney Maintenance
Manual for the action to be taken. After that has been accomplished, proceed as
follows to check the oil level.
1. Fill the oil tank to the appropriate normal level. Record the quantity of oil
added to the system.
2. Install the filler cap and dipstick. Ensure that the cap is locked securely.
3. Run the engine idle for approximately 5 minutes.
4. Check the oil level.
5. Check the oil filter per applicable Pratt & Whitney Maintenance Manual.
C. On engines which have remained stationary for a period of 12 hours or more,
proceed as follows to check the oil level.
1. Start the engine and run at idle speed for a minimum of 2 minutes.
2. Feather the propeller.
3. Shut down the engine.
4. Check the oil level.
D. Recommendations for oil change intervals are based on the performance of
specific brands of oil, specific types of oil, specific engine models, and specific
operating criteria. General oil change intervals may be extended periodically and
will be reflected by revisions to the Pratt and Whitney Engine Service Bulletin
13001. Permission for extension of oil drain intervals may be granted to
operators through monitoring programs, which are conducted by most major oil
companies that have been approved by Pratt and Whitney Canada. Service
Bulletin 13001 will be revised periodically to include newly approved oils. Refer
to Figure 2-8 for the locations called out in the following procedure.
1. Place suitable containers or drip pan under the engine.
2. Remove lock wire from the main oil tank's drain plug (Figure 2-8, #6) from
boss on compressor inlet case. Remove drain plug. Discard the preformed
packing. Also drain oil at drain port on left shin skin (on aircraft equipped
with quick drain).
3. Remove the rear case drain plug (Figure 2-8, #2) from the six o'clock
position on the rear face of the accessory gearbox housing. Discard the
preformed packing.
Effective: 05/05/04
AIRCRAFT MAINTENANCE MANUAL
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