Just received my AOA oil analysis report. My last report had a high iron value
(66 ppm), and this report the iron value is even higher at 75 parts per
million. AOA issued the following 4 recommendation codes:

117 iron appears high
129 possible cam/lifter wear
108 check oil filter for chips
135 resample 25 hours to monitor wear trend

This is a Continental E225-8 with only 322 hours on new Conti cylinders major
by a well-known shop 7 years ago. It runs great and burns 1 qt every 18 hr.
Last annual, all compressions were over 70.

Should I keep flying it and resample in 25 hours like AOA says or do something
now?

Do you see a bottom end overhaul in my near future?

Thanks.

Robin Hou