Steve, Iím guessing heís referring to the top bar. Itís above the doorís handle. Iíve grabbed it by mistake when going to open the oven door.
Treeman, did you check the packet of material that came with your trailer? Airstream puts all the manuals from each appliance in that pouch. If itís not there, Google it. You should be able to find a service manual for that oven online.
For the location of the handle, it looks like youíll need to get to the back side to tighten any fasteners unless it slides into a slot.
2019 27í Globetrotter FBT Walnut/Dublin Slate
2019 Ram 2500 6.4 Hemi Laramie Blue Ox 1000#