Thread: Internal Engine Icing - Beechjet 400

trafly wrote: Talked to a P&W senior engineer, and she told me that in testing, they had seen enough ice form on the stators of turbofan engines idling ON THE GROUND to almost totally block airflow to the engines. Now that clears things up in my mind. A blockage of flow. I was thinking that the ice released into the engine, flaming it out. Any ideas why we never heard of this on MU300's? at least not that I've seen/heard a...

It should be noted, that the icing that the P&W engineer is on the first stage compressor, the one visible in the inlet, and not at some point in the engine where there is heat from compression or combustion.

Found the URL. My quotes are from near the bottom under "LearJet Accidents." ARTICLE Was wondering about this because I can't find anyone who knows the scoop and was wondering just how many jets have these types of engines and might be at risk.

Alot of aircraft have these engines. Most Cessna 550/560's (Citation II / V, Ultra) from 80's and 90's. The Cessna and Raytheon fleet number in the thousands of aircraft (~5,000), times two engines each.

In my experience I have never heard anyone like the beechjet, either from a maintenance point of view or passengers. They also seem much louder than other aircraft equipped with the same engines. Just my 2 cents.

leardvr wrote: There is no fuel oil heat exchanger. A fuel/oil heat exchanger uses hot engine oil to heat cold fuel, and the cold fuel to cool the engine oil. Don't know if you are claiming there is some other cause of these flame outs, but the quotes from above would indicate a problem totally unrelated to fuel icing. TheButterflyLands wrote: which revealed that with engine anti-icing turned off it was possible for ice to build up on...