the carburetor is to remain on the engine during storage, the throttle valve should be wired open and a seal installed over the air inlet. But, if the carburetor is removed and stored separately, the seal is made at the carburetor mounting pad. The seal used in either instance can be an oil-proof and moisture-proof gasket, backed by a wooden or metal plate securely bolted into place. Silica gel should be placed in the intake manifold to absorb moisture. The silica gel bags are usually suspended from the cover plate. This eliminates the possibility of forgetting to remove the silica gel bags when the engine is eventually removed from storage. A ventilatory cover, without silica gel bags attached, can be used when the engine is stored in a metal container. 

After the following details have been taken care of, the engine is ready to be packed into its container. If the engine has not been spray coated with corrosion-preventive mixture, the propeller shaft and propeller shaft thrust bearing must be coated with the compound. Then, a plastic sleeve, or moisture-proof paper, is secured around the shaft, and a threaded protector cap is screwed onto the propeller retaining nut threads. 

All engine openings into which dehydrator plugs (or ventilatory plugs if the engine is stored in a metal container) have not been fitted must be sealed. At points where corrosion-preventive mixture can seep from the interior of the engine, such as the oil inlet and outlet, oil-proof and moisture-proof gasket material backed by a metal or wooden plate should be used. At other points moisture-proof tape can be used if it is carefully installed. 

Before its installation in a shipping container, the engine should be carefully inspected to determine if the following accessories, which are not a part of the basic engine, have been removed: spark plugs and spark plug thermocouples, remote fuel pump adapters (if applicable), propeller hub attaching bolts (if applicable), starters, generators, vacuum pumps, hydraulic pumps, propeller governors, and engine- driven fuel pumps. 

1. Remove seals and all desiccant bags. 

2. Remove cylinder dehydrators and plugs or spark plugs from upper and lower spark plug holes. 

3. Remove oil sump drain plug and drain the corrosion preventive mixture. Replace drain plug, torque and safety. Remove oil filter. Install new oil filter, torque and safety. Service the engine with oil in accordance with the manufacturer’s instructions. 

WARNING: To prevent serious bodily injury or death, accomplish the following before moving the propeller: 

a. Disconnect all spark plug leads. 

b. Verify that magneto switches are connected to magnetos and that they are in the off position and P-leads are grounded. 

c. Throttle position CLOSED. 

d. Mixture control IDLE-CUT-OFF. 

e. Set brakes and block aircraft wheels. Ensure that aircraft tiedowns are installed and verify that the cabin door latch is open. 

f. Do not stand within the arc of the propeller blades while turning the propeller. 

4. Rotate propeller by hand several revolutions to remove preservative oil. 

5. Service and install spark plugs and ignition leads in accordance with the manufacturer’s instructions. 

6. Service engine and aircraft in accordance with the manufacturer’s instruction. 

7. Thoroughly clean the aircraft and engine. Perform visual inspection. 

8. Correct any discrepancies. 

9. Conduct a normal engine start. 

10. Perform operational test in accordance with operational inspection of the applicable Maintenance Manual. 

11. Correct any discrepancies. 

12 Perform a test flight in accordance with airframe manufacturer’s instructions. 

13. Correct any discrepancies prior to returning aircraft to service. 

14. Change oil and filter after 25 hours of operation. 

## Engine Shipping Containers 

For protection, engines are sealed in plastic or foil envelopes and can be packed in a wooden shipping case or in pressurized metal containers. 

The engine is lowered into the shipping container so that the mounting plate can be bolted into position. The protective envelope is attached directly to the base of the shipping case. Then, the engine is lowered vertically onto the base and bolted directly to it. A carburetor not mounted on its reciprocating engine (or no provision is made to seal it in a small container to be placed inside the shipping case) can, in some cases, be fastened to a specially constructed platform bolted to the engine. 

Before the protective envelope is sealed, silica gel should be placed around the engine to dehydrate the air sealed into the envelope. The amount of silica gel used is determined by the 

