Boeing-Leonardo's MH-139A Grey Wolf helicopter still has not obtained a Federal Aviation Administration certification to fly -- pushing back the start of Air Force flight testing by one year. The service was originally supposed to begin flight testing the UH-1N Huey replacement aircraft in November 2019 but now expects to start 12 months later, Col. Glenn Rineheart, commander of the Air Force Operational Test and Evaluation Center's Detachment 5, told Inside Defense in a June 12 interview. Detachment 5...