ExpressJet Forum - View Single Post - N1 split in detent, ALT-TO1?

Mitch · 03-20-2008, 10:43 AM

No engine parameters were significantly different and those that were were nowhere near where I would think they would become a factor. (They were all "normal.") As far as the ITT goes, I always thought that, in normal ops, it was the result rather than a contributing factor. Maybe my understanding of it is backwards, but doesn't the FADEC schedule the N1 and then see what the ITT is and only adjust if a limit is exceeded? And then wouldn't we get the ATTCS NO MARGIN message if the FADEC thought the normal ALT-TO1 N1 thrust was too high?

03-20-2008, 10:43 AM	#3 (permalink)
Mitch ATP Join Date: Feb 2005 Location: Shoulda stayed in San Diego Posts: 2,833	No engine parameters were significantly different and those that were were nowhere near where I would think they would become a factor. (They were all "normal.") As far as the ITT goes, I always thought that, in normal ops, it was the result rather than a contributing factor. Maybe my understanding of it is backwards, but doesn't the FADEC schedule the N1 and then see what the ITT is and only adjust if a limit is exceeded? And then wouldn't we get the ATTCS NO MARGIN message if the FADEC thought the normal ALT-TO1 N1 thrust was too high? __________________ Warning: The unauthorized reproduction or distribution of this possibly copyrighted work could be illegal. Criminal copyright infringement, including infringement without monetary gain, is investigated by the FBI and is punishable by up to 5 years in federal prison and a fine of $250,000.