R3-Z17 was an R3-series astromech droid manufactured by Industrial Automaton sometime before the Battle of Endor. It served as Gwonam's copilot during the use of his X-wing starfighter .
R3-Z17 (nicknamed Arthur) was a defective droid that an unknown seller gave away with the purchase of an X-wing starfighter as a special offer. The fighter was sold to Gwonam, and R3 was given to him as well.
During the events of Gwonam Breaks an X-wing from eBay, Harkinian is teleported out of the X-wing's cockpit by Gwonam while R3 was in the droid socket. Unable to pilot the craft to safety, the droid screamed in horror as the fighter careened out of orbit towards the planet. The X-wing crashed with a brilliant explosion, destroying R3-Z17 instantly.