Incident Overview
On a maintenance test flight, a Navy Sikorsky MH-53A helicopter and a Cessna 172RG (registration N6624R) collided in midair over the Chesapeake Bay, near Kiptopeka, Virginia. The Cessna was on a flight to spot fish from approximately 3,500 feet MSL. Following the collision, the Cessna entered an uncontrolled descent and crashed into the bay. The helicopter was able to land in a field.
Air Traffic Control Communication
According to the investigation, the pilot of the Cessna 172RG contacted the DR-1 controller at Norfolk Departure Control at 1458 EDT. The Cessna was assigned a transponder code and was receiving VFR flight following. Two controller changes occurred at the DR-1 position after the Cessna established contact. At 1610 EDT, the second controller provided a relief briefing to the third controller, specifically referencing the Cessna. The helicopter pilot was not in contact with air traffic control and was operating with a VFR transponder code of 1200.
Helicopter Maneuvers and Collision
The helicopter initially operated at about 500 feet MSL. The pilot then momentarily climbed to approximately 6,000 feet to test a fuel dumping system. Radar data showed that after completing the climb, the helicopter entered a descent and was turning when it converged on the Cessna from above and behind. The midair collision occurred at about 1618 EDT, at an altitude of approximately 3,500 feet MSL. There had been no communication between air traffic control and the Cessna pilot for about 33 minutes before the collision.