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dlm46007(at)cox.net
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 Posted: Sat Nov 21, 2009 11:15 am Post subject: EGT sensor |
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I have GRT EIS sensors;
sent to GRT
"My #4 EGT sensor seems to be failing; temperature is consistently 500 degrees below others and bounces around by about 100 increments every second or so; CHT normal. I ran a ground mag check at 1700 RPM and found the mag drops to be 1630 and 1620, so I am relatively certain that the engine is operating normal but sensor is not. Please advise. Aircraft is now at 210 TT."
Anyone else have similar issue?
[quote][b]
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jesse(at)saintaviation.co
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| Posted: Sat Nov 21, 2009 1:21 pm Post subject: EGT sensor |
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I don't know a whole lot specifically about the GRT system, but when I see something like that, I assume there is a bad connection somewhere in the system, either a pin making bad contact in the connector at the Engine Monitor, or a bad crimp or spade connection in the FWF area or a bad sensor. Is your CHT running about the same as the others? If so, then it's almost certainly a sensor issue, but not necessarily a bad sensor. I'd check the connections first if the CHT is normal. If both sensors on the same cylinder are off, that may point to some kind of problem with that cylinder, but if just one is off, then I'd go for the sensor or connection.
My first guess would be a splice that is making connection part of the time and not making connection part of the time, because of the vibration.
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
Cell: 352-427-0285
Fax: 815-377-3694
On Nov 21, 2009, at 2:13 PM, David McNeill wrote:
[quote] I have GRT EIS sensors;
sent to GRT
"My #4 EGT sensor seems to be failing; temperature is consistently 500 degrees below others and bounces around by about 100 increments every second or so; CHT normal. I ran a ground mag check at 1700 RPM and found the mag drops to be 1630 and 1620, so I am relatively certain that the engine is operating normal but sensor is not. Please advise. Aircraft is now at 210 TT."
Anyone else have similar issue?
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thane
Joined: 27 Nov 2006
Posts: 56
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| Posted: Sat Nov 21, 2009 3:55 pm Post subject: EGT sensor |
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I had one fail new right out of the box. Do a continuity check and see if you have a bad lead. Mine had a bad lead inside the connector. Sent it back for replacement!!
Thane
321BY
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dmaib(at)mac.com
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| Posted: Sat Nov 21, 2009 5:53 pm Post subject: EGT sensor |
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I had been seeing similar variations on my fuel pressure readout. I called Sandy at GRT while doing my Condition Inspection and she seemed pretty positive that my fuel pressure sender was the likely culprit. She sent me a new one, I installed it, and the fuel pressure indication is now rock solid. She mentioned that some operators seem to get a pretty short life out of the fuel senders, (Mine had 163.5 hours on it) and some operators don't have problems. Mine is mounted on the firewall in the stock Van's location.Excellent customer service from GRT!
David Maib
40559
flying
On Nov 21, 2009, at 2:13 PM, David McNeill wrote:
I have GRT EIS sensors;
sent to GRT
"My #4 EGT sensor seems to be failing; temperature is consistently 500 degrees below others and bounces around by about 100 increments every second or so; CHT normal. I ran a ground mag check at 1700 RPM and found the mag drops to be 1630 and 1620, so I am relatively certain that the engine is operating normal but sensor is not. Please advise. Aircraft is now at 210 TT."
Anyone else have similar issue?
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href="http://www.aeroelectric.com">www.aeroelectric.com
href="http://www.buildersbooks.com">www.buildersbooks.com
href="http://www.homebuilthelp.com">www.homebuilthelp.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com">http://forums.matronics.com
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glastar(at)gmx.net
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| Posted: Sun Nov 22, 2009 1:39 am Post subject: EGT sensor |
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I had something similar and already bought other sensors it finally came
to the point, that the pins in the db25 were not seated right. Check
after shutdown by fumbling on all connectors from the sensor towards the
plug into the instrument to find out.
Werner
| Quote: |
On Nov 21, 2009, at 2:13 PM, David McNeill wrote:
> I have GRT EIS sensors;
> sent to GRT
>
> "My #4 EGT sensor seems to be failing; temperature is consistently
> 500 degrees below others and bounces around by about 100 increments
> every second or so; CHT normal. I ran a ground mag check at 1700
> RPM and found the mag drops to be 1630 and 1620, so I am relatively
> certain that the engine is operating normal but sensor is not. Please
> advise. Aircraft is now at 210 TT."
>
> Anyone else have similar issue?
*
*
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dlm46007(at)cox.net
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| Posted: Sun Nov 22, 2009 10:40 am Post subject: EGT sensor |
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I checked the 10 again today and found that #4 had a bad crimp on the sensor side, as supplied. After fixing that, I again performed the heat gun test as I did when installing originally. All but #4 showed a heat rise on the EIS. I have concluded I have a failed probe.
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Thane States
Sent: Saturday, November 21, 2009 4:50 PM
To: rv10-list(at)matronics.com
Subject: Re: EGT sensor
I had one fail new right out of the box. Do a continuity check and see if you have a bad lead. Mine had a bad lead inside the connector. Sent it back for replacement!!
Thane
321BY
[quote] ---
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dlm46007(at)cox.net
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| Posted: Mon Nov 23, 2009 6:45 am Post subject: EGT sensor |
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Sandy just agreed this morning that the sensor was the problem; she is sending one out at no charge (part 210TT), I gave them my credit card number to get priority shipment as I need it by Wednesday.
From: jason.kreidler(at)regalbeloit.com [mailto:jason.kreidler(at)regalbeloit.com]
Sent: Monday, November 23, 2009 6:15 AM
To: dlm46007(at)cox.net
Subject: EGT sensor
David, we had a sensor that was jumping around a lot at around 50 hours. GRT sent out a new sensor free of charge. Replacement works perfect...
Thanks, Jason
Jason J. Kreidler
Development Engineering
Commercial Motors Technology Team
Regal Beloit Corporation
Tel: 262-387-5403
Fax: 262-387-5449 [quote][b]
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