PPRuNe Forums - View Single Post - Turbo fan anomaly... driving me nuts and I don't have many left to lose
Old 2nd Jul 2022, 21:11
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Sig229
 
Join Date: Feb 2006
Location: Texas
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I'm not trying to be a jerk, but you're really freaking out over 25 degrees? I've never heard of any requirement for engine parameters to match up exactly, and in almost no case will they unless both engines are identical in every way. The split you're seeing could easily be explained by a minor difference in wear, bleed valve position, temperature probe condition, etc. I've seen a 100C difference in the 737 during cruise, as you can imagine airlines swap engines all the time so it would be easy to have a mix of old and new. Now if you were seeing that much difference (or more) in new(er) engines, or if you suddenly went from a small split to a large one with no explanation it might be worth looking into. But if it's only 25 degrees and doesn't change wildly then there shouldn't be any concern.

And again no offense, but trying to match ITT and therefore throwing N1 and N2 out of whack is just comical. Besides making the airplane out of trim as you mentioned, having the engines out of sync and the resulting wah wah wah had to be quite annoying!
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