If you head to one of Druid's old sietches (co-ords 19,22), you'll find an old fremen all west from the entry that wants to fix a windtrap. You'll need three parts for this, all inside chests in various sietches. <spoiler>First one is easy, as it's in the same sietch, just look in the various rooms for an openable chest.</spoiler> <spoiler>Second one is at 25,3</spoiler><spoiler> and third one at 60,12. </spoiler>
Show up with all parts in inventory at Give the parts to the same fremen for 1 qp.