It was said that when the thrust reversers are active the inboard Kruger flaps (slats) and the midspan Variable Camber flaps are retracted as seen in the KLM picture.
Photo © Peter Unmuth - Vienna Aviation Photography
Photo © Lee Archer
Now here is a picture of a PIA B744 and as you can see the thrust reversers are active and ALL of the LE flaps (including the outboard Variable Camber flaps) are retracted. My questions are:
1) Is that an airline specific item (the outboard LE flaps)?
2) Does it have anything to do with the engines type?
3) Did the KLM picture was photo before the outboard LE flaps were retracted?
4) What does actually happen when the pilot activate the thrust reverser?