Hello, I am trying to find out the cause of engine failure while in flight. 

First it has happened now three times, 2xwith the NGX and 1xwith the 777.  Prior to today I never had any engine problems while in flight. 

 

I do not have any failures set up to engage, I have plenty of fuel, and both engines are running normally prior to them shutting down, and both happen at the same time.

 

The ENG page, shows an indication of an X factor or something, sorry couldn't write the exact term down, as I was trying to control the aircraft while technically stalling and trying to restart the engines.

 

The NGX I had to restart the APU and bank the aircraft from side to side before I would get enough N1 rotation and the fuel would reengage, the 777 just started up with no problem.

 

I am at a loss as to what is going on.  Out of no where the engines just shut down an have to be restarted in flight?  There is fuel, no engine overheating or bad readings,  I did wonder if maybe the anti ice is need more???

 

The next time it happens, I will get a pen and write down what the indication or fault is.  All I can remember is that its either in a blue or purplish color with an X and outside or source or feed or external I think. 

 

Originally I though maybe this is just an isolated incident, but now it has happened on both the NGX and the 777 for three different flight. 

 

Any help in this matter would be greatly appreciated....

 

I used the non normal procedures to restart the engines, and they came back up as if nothing happened, but I would like to try and solve the issues as to what is causing the problem to begin with...

 

I hope that this is enough info to go off of, if anybody has any further questions and or needs information please let me know and I will get back as soon as possible, thanks and have a nice day! 

X-bleed is the purple message?

Hi,

 

It could be that your fuel valves are not setup properly and the engines are being starved of fuel. Is this happening later in the flight? You may have to turn the x-feed valves on once the direct fuel tank feeding the engine is low. This will allow the fuel to balance from the secondary tanks.

 

On the other hand I could be completely wrong..

 

All the best, John

 

 

You may have to turn the x-feed valves on once the direct fuel tank feeding the engine is low. This will allow the fuel to balance from the secondary tanks.

 

I believe this is more of a 747 thing. The NGX shouldn't need you to do anything other than turn off the center tanks once they're near empty. This is of course assuming you turned on ALL (relevant) pumps before engine start.

 

And from what I've heard, the T7 is automated enough to take care of fuel/pump management on its own. If I'm wrong, then please let me know. I'd be surprised if the T7 didn't handle it "behind the scenes" as long as everything was properly set up.

 

 

Are both engines quitting at the same time? Do you have any shortcuts mapped to the fuel switches? If not, that's really strange. How far into the flight are you when this happens?

 

 

Originally I though maybe this is just an isolated incident, but now it has happened on both the NGX and the 777 for three different flight. 

 

Sounds like you're not setting something up properly, or you have hardware that's interacting with your fuel cutoff.  If you have a hardware yoke with a mixture lever, make sure that lever stays forward.  Otherwise, it cuts off fuel flow.

 

Are you sure you've turned the fuel pumps on?

Do you use a throttle controller?

 

I had the same thing happen & turned out to be a CH products throttle screwing up.