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MaorC

Problems with engine start .

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Hello ,

 

I started study the 747-400X , and today wanted to make a flight ELLX-LOWW .

when i tried to make the engines start running ( i am working by checklist ) and the N2 of engine 4 is stuck on 31% , here is an image :

 

 

2012530162033677.png

 

 

btw i used autostart so the fuel control was open before the start selector , and when i saw that isnt working so i tried no - autostart also .

 

Someone is know what is the problem ?

 

Thank you ,

Maor .

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The 747 should be able to spin two engines at once, but it is still possible that with one pack on, you don't have enough bleed pressure.

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When starting the engines either turn all packs off or packs 1 and 3 off, then start engines 4+3 together and then 2+1 together or individually, starting with 4 then 3 then 2 then 1 or the reverse, also keep continuous ignition switched off until all engines have been started.

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Next time you start the engines, make sure that "ENG fire protection system" is not armed.

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