Vertibird plans

The  are a set of plans for building Vertibirds, found in Navarro inside a locker in the garage to the northeast, behind Quincy.

Both the Brotherhood of Steel and the Shi wanted the Chosen One to get these plans for them from the Enclave, however it is unknown what his eventual decision was. It is possible he gave both factions a copy of the plans, as the Brotherhood chose to repay him for the completion of the mission with his own copy.

In Fallout: New Vegas, it isn't explication mentioned of what became of the plans. However, it is mentioned that Bear Force One was the San Francisco area's contribution to NCR. This suggests that canonically the Chosen One gave the plans to the Shi.