February 2001 Issue

Letters 02/01

Aviation Labs Is Tops
Regarding your article in the December issue on labs that perform oil analysis, I thought I’d pass this along. For several hundred hours I have been finding aluminum flakes in my oil filter and suction screen. Oil filter elements were sent to three of the labs mentioned in your article.

I even sent samples to Light Plane Maintenance, your sister publication. Two of the three labs and LPM diagnosed it as aluminum, probably from the piston pin plugs.

Both recommended flying the airplane another 25 hours, resampling, and borescoping the cylinders for telltale striping. The flakes came and went, reappeared and disappeared.

I did this for 200 hours...

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