I recently purchased a plane with an AEIO-360-A1E with 682 TTSN. The oil was last changed in 2005. It had been annualed, and ferried to my location, where I pulled an oil sample and changed the oil.
My analysis came back with high concentrations of Iron (220 ppm) and aluminum (43 ppm) and moderate concentrations of chromium (19 ppm).
The lab suggested abnormal cylinder wear and recommended pulling a sample in 25 hours for re-analysis. The technician suspected that the iron could have been rust, and the rust could have caused the premature cylinder wear.
Does anyone have any recommendations for what I should look at first in trying to determine where these higher than normal concentrations are, and is this something that should be expected to return to normal after a fresh oil change and frequent use?
Good Flying,
Josh P.
My analysis came back with high concentrations of Iron (220 ppm) and aluminum (43 ppm) and moderate concentrations of chromium (19 ppm).
The lab suggested abnormal cylinder wear and recommended pulling a sample in 25 hours for re-analysis. The technician suspected that the iron could have been rust, and the rust could have caused the premature cylinder wear.
Does anyone have any recommendations for what I should look at first in trying to determine where these higher than normal concentrations are, and is this something that should be expected to return to normal after a fresh oil change and frequent use?
Good Flying,
Josh P.