Username Protected wrote:
Single engine- range with burn
Not worried. Super SII OEI service ceiling is FL370 at gross, so by the time you are 2300 lbs down at ETP, you can maintain FL410 on one engine. At that altitude, I am pretty sure your lbs/nm specific range is not affected too much and can make land. It might even be the case your range improves on one engine, assuming you can maintain cabin pressure and stay at altitude.
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Emergency return
How is this different than finishing the flight normally if you are past the ETP, or turning around before? If you could do the flight, then you can do this one, I would think. You got both engines, and cabin pressure.
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O2 lost - decent to 10000 feet
This is the one that gets my attention.
At the ETP, you have about 3500 lbs fuel. At 15,000 ft with both engines, the specific range is 3.1 lbs/nm, so you can go 1,130 nm in still air. With a headwind, you might not make it to land.
Of course, you don't instantly appear at 15,000 ft, so during the descent, you pick up some distance and don't burn much fuel in an emergency descent.
If you can stay on oxygen for a bit of time, then things get much better.
If the situation requires it, I would go on oxygen and fly at FL180 and let the passengers sleep. You got to do what you got to do.
Having an emergency exactly at ETP is exceptionally rare. It may have never happened in the entire history of Citations, or maybe even all of aviation. You are more likely to have an on board fire and then being 60 minutes from land won't help much.
Mike C.
