Section 8
Handling, Servicing, and Maintenance
Columbia 400 (LC41-550FG)
RC050002
Initial Issue of Manual: November 10, 2004
8-16
Latest Revision Level/Date: -/11-10-2004
1. Remove the top spark plug from each of the six cylinders, and apply an atomized injection
of preservation oil, MIL-L-46002, Grade 1 at room temperature through the upper spark
plug hole of each cylinder with the piston in approximately the bottom dead center position.
Rotate the crankshaft as opposite cylinders are sprayed. Stop the crankshaft with none of the
pistons at top dead center.
2. When Step 1 is complete, and with none of the pistons at dead center, re-spray each cylinder
thoroughly making sure to cover all interior surfaces.
3. Install spark plugs.
4. Spray approximately two ounces of preservation oil through the oil filler tube.
5. Seal all engine openings exposed to the atmosphere with suitable plugs or moisture resistant
tape.
6. Tag engine, cowling, and other appropriate areas with the statement, “Do not turn propeller,
engine preserved.”
Return to Service from Temporary Storage
–
To return an airplane that has been in temporary
storage to active service, perform the following steps:
1. Remove seal plugs, tape, and all methods of tagging the airplane, including items tagged on
the airframe.
2. Remove the bottom spark plug from each of the six cylinders, and rotate the propeller
several times to remove the preservation oil.
3. Reinstall the spark plugs according to manufacturer’s recommendations.
4. Conduct a normal engine start, and idle the engine for several minutes until oil temperature
is within normal limits. Monitor engine instruments to ensure they are within normal
operating ranges.
5. Stop the engine and inspect the entire airplane before test flying.
Indefinite Storage
(Over 90 Days)
– If the airplane is to be stored for a long period, follow the
procedures listed below to preserve the engine. See the Airframe Preservation for Temporary and
Indefinite Storage heading on page 8-17 for airframe preservation items.
1. Drain the engine oil and refill with MIL-C-6529 Type II preservation oil. Start the engine
and operate until normal temperature ranges are achieved. Fly the airplane for about 30
minutes and then allow the engine to cool to the ambient temperature.
2. Follow Steps 1, 2, and 4 for Temporary Storage.
3. Install dehydrator plugs MS27215-1 or -2, in each of the top spark plug holes. Ensure the
dehydrator plug is blue when installed. Protect and support the spark plug leads with AN-
4060 protectors.
4. Place a bag of desiccant in the exhaust pipes, and seal the openings with moisture resistant
tape.
5. Seal the induction system with moisture resistant tape.
6. Seal the engine breather by inserting a dehydrator plug, M527215-2, in the breather hose
and clamping in place.
7. Tag engine, cowling, and other appropriate areas with the statement, “Do not turn propeller,
engine preserved.”
8. Install plugs in the engine cowl inlets and all other openings.
Do not plug or seal tank
vents on the bottom of each wing.