robthart Posted November 28, 2015 Report Posted November 28, 2015 A vexing problem; Club 2008 CT (1,400 hrs) has on several past occasions gone into spurts where (right) EGT alarm has sporadically triggered. Sometimes just landing & restart has resolved, have recently replaced all sensors & was fine for about 30 hrs, but happened the other day again. Don't know if related, however about 100(+) hrs ago also developed a fine crack in right side exhaust manifold, resolved by certified weld. Just had 100hr & annual with no probs detected. Any ideas?
gbigs Posted November 28, 2015 Report Posted November 28, 2015 A vexing problem; Club 2008 CT (1,400 hrs) has on several past occasions gone into spurts where (right) EGT alarm has sporadically triggered. Sometimes just landing & restart has resolved, have recently replaced all sensors & was fine for about 30 hrs, but happened the other day again. Don't know if related, however about 100(+) hrs ago also developed a fine crack in right side exhaust manifold, resolved by certified weld. Just had 100hr & annual with no probs detected. Any ideas? Either the sensor is bad, or you are running hot. Is the EGT hot on the side where you cracked the exhaust manifold?
Ed Cesnalis Posted November 28, 2015 Report Posted November 28, 2015 Have you looked at your needle jets?
robthart Posted November 28, 2015 Author Report Posted November 28, 2015 Yes, weld & EGT alarm same side... have not checked jets, looking for recommendations to pass on to mechanic, thx!
robthart Posted November 28, 2015 Author Report Posted November 28, 2015 Additionally, don't know if makes difference however have run Avgas exclusively (with 25 hr oil changes)
Anticept Posted November 28, 2015 Report Posted November 28, 2015 Strongly leaning towards a connection issue rather than a sensor or engine issue. Make sure that the connector crimps aren't flimsy, and that there's a good solid connection in the ems connector. Is it spiking high, or is it gradual?
robthart Posted November 29, 2015 Author Report Posted November 29, 2015 It has been my experience (this has happened to most of our pilots over time) that it begins with random spikes into the yellow/red zone 'til the alarm finally triggers... hard to pin down a 'steady' temp, as when it happens it jumps around (including drops back to green). Want to thank all for ideas, we've been dealing with this for quite some time and recall there's been two sensor changes now with no joy. Most are comfortable it is false alarm & not an engine issue, but very uncomfortable to passengers (& pilot too) when a red light & buzzer goes off! All of your thoughts will be passed on, thx!
Anticept Posted November 29, 2015 Report Posted November 29, 2015 Is it sudden spikes, or gradual? Sudden means connections or EMS issue. Gradual, as in you see a slow to moderate increase and decrease, means there likely really is a problem with the engine.
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