Today's Message Index:
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1. 10:28 AM - Re: Bad news from AOA (carmine pecoraro)
2. 06:30 PM - Re: Bad news from AOA (Ron Davis)
Message 1
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| Subject: | Bad news from AOA |
--> Beech-List message posted by: "carmine pecoraro" <aeroauto@hotmail.com>
Do like they say and keep flying. Cut open the filter and inspect for metal.
Is your oil filler cap very rusty? If so clean it after every flight. It
will deposit rust in the crankcase.
cheers carmine pecoraro
>From: ROBINFLY@aol.com
>Reply-To: beech-list@matronics.com
>To: beech-list@matronics.com
>Subject: Beech-List: Bad news from AOA
>Date: Mon, 23 Feb 2004 22:53:25 EST
>
>--> Beech-List message posted by: ROBINFLY@aol.com
>
>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? If I should something now, what should I do?
>
>Do you see a bottom end overhaul in my near future?
>
>Thanks.
>
>Robin Hou
>
>
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Message 2
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| Subject: | Re: Bad news from AOA |
--> Beech-List message posted by: Ron Davis <radavis2522@netzero.net>
Robin,
I think that, with a little prudence and TLC, you may be able to squeak by
with another 1,000 hours before it needs any major attention. :-)
Here are my AOA numbers, taken every oil change / 50-ish hours since my
overhaul:
Aluminum Copper Chrome Silver Magnesium
| Iron | Nickel | Lead | Silicon | Codes
| | | | | | | | | +++++++++++
22 95.0 32.0 7 9 N/A 0 44 N/A 119 133
37 224.0 29.0 33 21 N/A 0 34 N/A 196 125 135
23 142.0 19.0 17 15 N/A 0 17 N/A 194 170
13 82.0 27.0 12 9 N/A 0 15 N/A 103 170 994
18 105.0 21.0 13 10 N/A 0 13 N/A 116 129 170
23 140.0 15.0 14 11 N/A 0 12 N/A 180 135
19 177.0 16.0 16 9 N/A 0 8 N/A 180 108 158
18 99.0 13.0 12 7 N/A 0 9 N/A 179 135
--- ------ ---- --- ---- ---- --- ---- ------ -----------
119: No abnormal wear detected for overhaul times
133: Resample next oil change to establish wear trend
196: Wear metals appear high for low oil time
125: Possible residual break-in
135: Resample 25 hours to monitor next wear trend
194: Wear metals improved for wear time
170: Resample next oil change to check wear trend
103: Copper appears slightly high
170: Resample next oil change to check wear trend
994: Copper high possible due to additive system in Shell 15/50
116: Iron appears slightly high
129: Possible Cam/lifter wear
170: Resample next oil change to check wear trend
180: Iron increased for oil time
135: Resample 25 hours to monitor next wear trend
180: Iron increased for oil time
135: Resample 25 hours to monitor next wear trend
108: Check oil filter for chips
158: Resample 15 to 20 hours to monitor wear trend
179: Iron improved for wear time
- - -
Oh, come on! I'm beginning to believe they use a dart board to come up with
the "recommendation codes" they report. And look at all the ways they want
you to resample it right away (so we can bill you again ... right away).
Oil consumption started out at about 1 qt every 18-25 hours, and has settled
back to a quart every 10-12 hours. I think that's to replace the oil that's
dribbling on the keel and nosewheel strut more than blowing out the engine.
The ritual oil filter sacrifice and disembowelment has always shown about a
half teaspoonful of tiny coffee ground carbon bits, but *nothing* I can pick
up with a magnet.
I'm at roughly 500 hours right now, and my E225-8 is running like a Swiss
watch. An oily one, perhaps, but its ticking over just fine. Compression
in the 70's.
I don't think I'd change a thing.
Ron Davis
ROBINFLY@aol.com wrote:
> --> Beech-List message posted by: ROBINFLY@aol.com
>
> 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? If I should something now, what should I do?
>
> Do you see a bottom end overhaul in my near future?
>
> Thanks.
>
> Robin Hou
>
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