A move to swiftly pass the bill failed by a single vote. It would have required aircraft to carry technology that officials said might have prevented a midair collision near Washington last year.
The bill’s failure upends the debate around how to respond to last year’s fatal crash between a military helicopter and a commercial jet over the Potomac River.
The legislation’s advocates say a close call between two private planes near Teterboro, N.J., on Feb. 13 underscored how collision prevention technology could save lives.
A Learjet corporate aircraft carrying eight people to Teterboro Airport in New Jersey was forced to to descend quickly to avoid a midair collision on Feb. 13.