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TEO-540-A1A Engine Installation and Operation Manual
8. While the engine is still hot, immediately remove sufficient cowling to access the spark
plugs.
9. Remove either the top or bottom spark plug from each cylinder (per the "Spark Plug
Removal" procedure in Chapter 74-20 in the TEO-540-A1A Engine Maintenance Manual).
10. Put the sprayer nozzle in the open spark plug hole on each cylinder.
11. Use the sprayer to apply a coat of approximately 2 oz. (60 ml) of the preservative oil mixture
through the spark plug hole on the interior wall of each cylinder.
CAUTION
12. After spray application is complete, remove the sprayer from the spark plug hole.
13. Install the cylinder dehydrator plugs MS-27215-2 (or equivalent) if the aircraft is kept in a
region that has high humidity or near a sea coast.
NOTICE: Cylinder dehydrator plugs are recommended to be installed in place of spark plugs
because the dehydrator plugs provide moisture indication.
14. While the engine is still warm:
A. Remove the intake pipes per instructions in Chapter 72-80 in the TEO-540-A1A Engine
Maintenance Manual; remove the exhaust system per the airframe manufacturer's
manual.
B. Install bags of clay desiccant in the exhaust and intake ports.
C. Install the intake pipes per instructions in Chapter 72-80 in the TEO-540-A1A Engine
Maintenance Manual; install the exhaust system per the airframe manufacturer's
manual.
D. Attach red cloth streamers to the desiccant as a reminder for the material to be removed
when the engine is ready for flight.
E. Use moisture-proof material and pressure sensitive tape to seal these openings:
• Exhaust ports
• Intake ports
• Breather
F. Put a note on the propeller that reads: "Engine preserved - DO NOT TURN THE
PROPELLER."
G. At 15-day intervals, examine the clay desiccant in the desiccant bags and the cylinder
dehydrator plugs (if installed). When the color of the desiccant has changed from blue to
pink, remove the used clay desiccant bags and plugs. Install new clay desiccant bags and
cylinder dehydrator plugs. Record the date (for future reference) when the desiccant bags
and/or plugs were installed.
H. To return the engine to service after preservation, refer to the "Prepare a Stored Engine
for Installation" section in the "Requirements for Engine Installation" Chapter of this
manual.
© 2018 Avco Corporation. All Rights Reserved
October 2018
DO NOT TURN THE CRANKSHAFT AFTER SPRAYING THE
CYLINDERS WITH PRESERVATIVE OIL.
• Vacant accessory pads
• All openings that connect the inside of the engine to the outside
atmosphere
Engine Preservation and Storage
Page 79
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