LINCOLN -- Lawmakers have failed to reach a vote on a proposal to buy a $2.2 million airplane from the University of Nebraska Foundation. The Legislature adjourned shortly after 11 p.m. Thursday without voting on the measure. It was included in the state's proposed budget after the foundation decided to sell its Beechcraft Super King Air airplane. Gov. Dave Heineman and agency officials use the plane through a lease agreement. Some lawmakers questioned whether the plane is necessary, or if better deals are available through charter flights, leases, or time-share agreements. Sen. Bob Krist, a pilot, says buying a new plane with a warrantee could be more cost-effective. Lawmakers defeated a proposal that would have halted the purchase to study whether better options are available.