You must be either a level 72 adventurer or a level 50 tradeskiller in order to receive this quest.
Steps
Speak with Dudley Sprocklit at ( 1405, 406, 704 ) Copy/waypoint 1405, 406, 704. Use the first cannon, Upper Dropzone Gnomecannon, to get a ride across.
Gather 8 ore from the excavation bots by clicking on the nearby wagons. You can find these around ( 1346, 412, 653 ) Copy/waypoint 1346, 412, 653 and ( 1323, 407, 823 ) Copy/waypoint 1323, 407, 823
Gather a fiber from one of the sweeper bots at ( 1365, 406, 750 ) Copy/waypoint 1365, 406, 750 by right-clicking on it and selecting "Retrieve fiber."
Use the newly-built cannon and return to Ember Tizzlespring (Note: You may have to unmount before using the cannon, else you will just fire into the ground due to the extra weight of your mount).
Rewards
At least 22g11s70c
Picking up the quest allows you to use the Upper Dropzone Gnomecannon at the Dropship Landing Zone to travel across the gorge to mainland Moors of Ykesha.
Finishing the quest allows you to use the Lower Dropzone Gnomecannon on site U.J.L. 1.0 to fly back to the Dropship Landing Zone.