Boeing Co (BA.N) has started using a new automated system to build wing panels for 737 jetliners, an important step in preparing to hit record production speeds while introducing new models of the popular plane. The robotic system, known as the Panel Assembly Line, or PAL, this week drilled holes and installed rivets for the wings of a production aircraft, the first such use of the system since installation began last summer, Boeing officials told Reuters during a visit to the Renton, Washington, plant.