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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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 Posted: Sun Aug 09, 2020 5:32 pm Post subject: EIS |
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Has anybody ever had a problem with their EIS showing false readings mostly concerning CHT's and every thing else, but not turning on the red warning light?
On my last flight with a passenger, over some really rough country and a long walk from civilization, the EIS went totally bonkers, about 40 minutes into the flight. There was no p[lace to land that we both could have gotten out of again, without walking, so I decided to fly it until it wouldn't go any more. Well it never got to that point, there was no sound to indicate that something had departed without us and the engine was running just as smooth as before, plus the warning light did not come on. I eventually decided that the problem was with the EIS rather than the engine, so we came on home.
I did a superficial check of grounds, and could see nothing obvious. This unit has a lot of hours on it as well as being about 10 years old. I haven't contacted Grand Rapids as yet, to see what they think. Just wondering if any one else had seen that problem.
Larry
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The older I get, the less tolerant I am of those who are intolerant of others.
If you forward this email, or any part of it, please remove my email address before sending.
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stuart(at)harnerfarm.net
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| Posted: Sun Aug 09, 2020 7:38 pm Post subject: EIS |
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Sure sounds like a grounding issue. Could be a bugger to troubleshoot.
Did it act up all the way home or did it recover at some point?
Can you reproduce the symptoms on the ground with or without the engine running?
Were you able to determine the system voltage while this was going on?
Do you have a really good digital multi-meter or an oscilloscope?
Old adage from a farmer friend who restores tractors. “Check the grounds, check the grounds, check the grounds”.
I wonder could it have just been an issue with the LCD display. Heat and vibration make those things go whacky, but they usually don’t recover at all. Try pressing lightly all around the perimeter of the display and see if it changes anything.
Good luck,
Stuart
From: owner-kolb-list-server(at)matronics.com [mailto:owner-kolb-list-server(at)matronics.com] On Behalf Of Larry Cottrell
Sent: Sunday, August 09, 2020 8:31 PM
To: kolb-list(at)matronics.com
Subject: EIS
Has anybody ever had a problem with their EIS showing false readings mostly concerning CHT's and every thing else, but not turning on the red warning light?
On my last flight with a passenger, over some really rough country and a long walk from civilization, the EIS went totally bonkers, about 40 minutes into the flight. There was no p[lace to land that we both could have gotten out of again, without walking, so I decided to fly it until it wouldn't go any more. Well it never got to that point, there was no sound to indicate that something had departed without us and the engine was running just as smooth as before, plus the warning light did not come on. I eventually decided that the problem was with the EIS rather than the engine, so we came on home.
I did a superficial check of grounds, and could see nothing obvious. This unit has a lot of hours on it as well as being about 10 years old. I haven't contacted Grand Rapids as yet, to see what they think. Just wondering if any one else had seen that problem.
Larry
--
The older I get, the less tolerant I am of those who are intolerant of others.
If you forward this email, or any part of it, please remove my email address before sending.
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
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