PL-1
this designation was created for a specialized X-Wing part, shortly after the Battle of Endor. When Rogue Squadron resigned its commission to battle Ysanne Isard at Thyferra, the New Republic was unable to directly supply them with X-Wings. However, they managed to sell off a number of X-Wings as broken surplus because they lacked PL-1s. This was a bookeepping ruse, though, because PL-1 actually referred to the pilot of the craft.