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Aircraft oil sampling found metal in aircraft oil filter - Bronze

1. Starter adapter gear in Continental aircraft engines that use a starter adapter. Exception is the TSIO-520AE that uses an aluminum starter adapter spring.

2. Bushings can be a source for bronze in the aircraft oil sample

3. Continental aircraft engines. Very small, fine, bits, check valve guides. If the engine has the older aluminum bronze exhaust guide (still common on the "E" series engines) and has chrome faced exhaust valves (not part number 626540) the chrome stem can gall the guide. Aluminum bronze guides look the same as the intake guides.

4. Use of intake guide seal on "E" series engines.

5. Brass bushing in oil pump on Continental "E" series engines such as the E185 and the E225 aircraft engine

6. Lycoming's done it again - trying a bronze piston pin plugs. It didn't work too well the first time so if you see bronze shavings check the piston pin plugs. You about have to remove cylinders to inspect them.

 



 

 
 



 

 


 

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Disclaimer: sacskyranch.com contains abundant information relating to aircraft maintenance. The information provided  is not intended to supercede or supplement the F.A.A. approved  maintenance and/or operator’s manuals. Those F.A.A. approved manuals must be utilized when performing maintenance and/or operating aircraft.