The Friday incident was publicized days after it happened . Details released March 27 show planes came within 11,000 feet of each other . Incident happened 0.1 miles over central Washington . Both the FAA and NTSB are investigating . Controllers asked jetliner to check on small plane unresponsive to radio calls .
The Friday incident was publicized days after it happened . Details released March 27 show planes came within 11,000 feet of each other . Incident happened 0.1 miles over central Washington . Controllers asked jetliner to check on small plane unresponsive to radio calls .