sparks in the engine turbine blades

[bigjobs]

upon landing this morning I was watching the engines from my window seat (VH OJE). we touched down and the reverse thrusters start up. as the engine revs seemingly peak there is a mass of sparked clearly visible in both engines. easiest way to describe it would be like a grinder of some kind when it hits metal. they only lasted for a second or so.

anyone know what that's all about? I thought maybe some kind of movement in the structure housing these blades under the load of breaking and reverse thrust causing the blades to come in contact with a surface they don't normally contact ... I have no clue though.

we need an ask the engineer thread.

 

[Undercover Brother]

I am not sure, but I hope you reported it to the cabin crew on exit for safety's sake.

 

[Skyring]

There's some discussion here and click on the main image to see VH-OJT thrust reversing in snow with apparent sparking around the intakes. Another thread has apparent agreement that it is debris/dust/grit blown up by the RT and sucked in again. Obviously that's only going to happen below a certain ground speed.

 

[bigjobs]

There's some discussion here and click on the main image to see VH-OJT thrust reversing in snow with apparent sparking around the intakes. Another thread has apparent agreement that it is debris/dust/grit blown up by the RT and sucked in again. Obviously that's only going to happen below a certain ground speed.

ok, that makes sense. it was wet on the runway and there were clear 'vortexes' swirling around the engine intake as revs spooled up. static electricity is a reasonable explanation. it was humid and wet on landing.

 

[kristophe]

Yikes. I hope you changed your trousers after this