The NTSB is continuing its investigation into how an American Airlines regional jetliner collided midair with a Black Hawk military helicopter.

Officials are examining black boxes from both aircraft and say they appear to be in good condition and may provide details on what went wrong.

O’Hara, 28, of Lilburn, Ga., served as a Black Hawk repairer in the Army from July 2014 until his death. He was the crew ...