is attack on titan (shingeki no kyojin) episode 17 filler?

The Scout Regiment soldiers enter the area beyond the Walls, beginning the expedition. Shortly afterward, Miche Zacharius notices a Titan with his keen smell and even though Hange Zoë is interested in it, the support squad rushes to deal with it in order to keep the Titan away from the main squad.

As they engage the Titan, Sasha watches in fear, but her squad leader tells her to focus and just let the supporting squad deal with the situation.