A partial ban on military helicopters flying into Ronald Reagan National Airport in Washington D.C. is being recommended by the National Transportation Safety Board.

The preliminary report comes nearly two months after the mid-air crash between an Army helicopter and an American Airlines jet. U.S. Rep. Sam Graves, R-Mo. 6th Dist., said a total ban on military choppers flying into the airport is out of the question.

“We can’t shut down those corridors,” he told Missourinet affiliate KFEQ in St. Joseph. “We need those corridors for the military to use, and actually what they’re training for is evacuation of government buildings in case there is a problem.”

The NTSB is recommending helicopter operations on specific routes be banned when two runways at the Washington, DC airport are in use. But Graves maintains that the military needs to be able to fly into and out of Reagan National as needed.

“Obviously (the helicopters) need to stay within their lanes, and they also need to stay at the assigned altitudes,” Graves said. “(The crash) was a colossal culmination of many mistakes that just happened and culminated at exactly the wrong time, and it resulted in extraordinary tragedy.”

The crash left 67 people dead, including 28 members of the figure skating community who had left a competition in Wichita, Kansas. The NTSB said the Black Hawk helicopter pilots were undergoing an annual test and might have been wearing night-vision goggles when the crash occurred.