Sparks in 777 GE90 engine
 

Hi, can anyone say what causes the sparks at 3:30?

Thanks

I don't believe those momentary tiny 'flashes' are sparks. They look more like something in the air (rain drops?), immediately ahead of the engine intake, being illuminated by a nearby light, likely the starboard landing light in the wing root.

Certainly looks like something being picked up at the start of the roll. Now, seeing sparks suddenly coming out the other end of a gas turbine can lead to some "entertainment" as I witnessed once! :ok: Not a GE90 ...... but the bang when it all gave way was loud enough. :}

You might find the engine is ingesting sand particles, which when hitting the leading edge of the fan blade will cause a spark. Used to see it all the time with late night arrivals taxiing in to bridge.

Rain drops going horizontal due to suction.