Rura shakes his head as soon as you suggest it - doing so could possibly set off a smaller rockslide. At least you can tell that it will all be behind you. You'll have to find a different route back, of course, but better that than getting trapped here now.
This is going to come down to a number of pilot rolls to see if you can successfully navigate through fast enough to not crash and not get crushed.
So here we go! Basically the idea is to get a certain number of successes on pilot rolls as quickly as possible. The fewer rolls it takes, the better you get through it.
Galder must have the eyes of a blinded eagle, because he gets no luck on that Observation roll, with a grand one success. However, he gets a pretty clear sense from the Force as to where to go, which will help Taiza. This starts her out with five successes out of the twenty required to successfully escape the rockslide.
The dice roll exactly average rolls, with Taiza managing to get three successes each time. Five rolls it takes, then; not great, but also not bad. There are a few close scrapes, and several times where the speeder runs a bit too close to a cliff edge (it will need a new paint job), and a few of the smaller rocks manage to bounce across the top of the speeder itself. But no one takes any injuries, and with Galder managing to sense the correct way away from there, you manage to make it through more or less unscathed, the rumbling of settling rocks safely behind you. The speeder is a bit beat up, though, and Taiza is wary about pushing it too much anymore.
Of course, this will make getting back to the ship more difficult, but there's no point in worrying about that at the moment.
"Go for it, then," Taiza comments.
Thanks to good rolls, you quickly figure out that it must be rock dust clogging up stuff, and are able to clear it out without any problems. Taiza powers the speeder back up again when you're done and confirms that it feels like it's running smoothly like it had been before.