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#1
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Bad news from AOA
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 |
#2
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Check this out:
http://baldeagleflyingclub.org/Lifters.htm Our experience? We had a very small amount of chips in the filter. Two shops and AOA said to resample in 25 hours and keep an eye on it. Second oil change, we had more chips and pulled the lifters. Two were bad and the cam shaft was damaged just slightly beyond airworthiness. If we had pulled the lifters immediately we would have been flying all winter and the repair bill would have been 1/10 th as much. Check the filter every oil change with a magnet. If even one magnetic chip shows up, take a look at the lifters. They fail in chunks. Most other parts wear. Your engine will run and sound great with bad lifters. The pieces are so heavy that they usually won't suspend in the oil and show up in the analysis. -- Roger Long ROBIN FLY wrote in message ... 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 |
#3
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Whistling past the graveyard won't work on this one... Talk to your
mechanic, but it's probably time for a jug to come off and take a look see - especially at the lifters and cam... denny "ROBIN FLY" wrote in message ... 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 |
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