GAITHERSBURG, Md. (WTVD) -- A small, private jet slammed into a house Monday, killing a woman and her young sons inside the home and three people on the aircraft, authorities said.
The plane left Horace Williams Airport in Chapel Hill Monday at 9:30 a.m.
Michael J. Rosenberg, the CEO of North Carolina-based Health Decisions, was among the three fatalities on the plane.
The organization says Rosenberg founded Health Decisions in 1989. According to its website, Health Decisions provides services for clinical trials.
Click here for a statement from Health Decisions.
Rosenberg was a pilot who crashed a different plane in Gaithersburg on March 1, 2010, according to a government official who wasn't authorized to speak publicly and asked not to be named. Investigators are still trying to determine if Rosenberg was at the controls at the time of Monday's crash.
The jet crashed around 10:45 a.m. in Gaithersburg, a Washington, D.C., suburb, Montgomery County Fire and Rescue Chief Steve Lohr said during a news conference.
Authorities quickly said all three people in the plane had been killed, but it took hours for fire crews to sweep the home and confirm that three people were inside. They were identified as 36-year-old Marie Gemmell and her two sons, 3-year-old Cole and a 1-month-old Devon, police said.
They were found in a second-floor bathroom. Gemmell was lying on top of her young sons in an apparent effort to shield them from the smoke and fire, said police Capt. Paul Starks. Her husband and a school-age daughter were not home and were accounted for, police said.
The fuselage of the jet crashed into the front lawn of an adjacent home, which was heavily damaged by fire, and investigators believe one of its wings, which had fuel inside, was sheared off and tore through the front of the Gemmell home, said Robert Sumwalt, a National Transportation Safety Board member. Witnesses reported seeing and hearing a secondary explosion after the plane hit the ground.
The two-story, wood-frame home was gutted. The first floor was nearly completely blown out and smoke drifted from a gaping hole in what was left of the collapsing roof. No one was injured in the adjacent homes that also had major damage.
Fred Pedreira, 67, who lives near the crash site, said he had just returned home from the grocery store and was parking his car when he saw the jet and immediately knew something was wrong.
"This guy, when I saw him, for a fast jet with the wheels down, I said, 'I think he's coming in too low,'" Pedreira told The Associated Press. "Then he was 90 degrees - sideways - and then he went belly-up into the house and it was a ball of fire. It was terrible.
"I tell you, I got goosebumps when I saw it," Pedreira said. "I said, 'My God, those are people in that plane.'"
Emily Gradwohl, 22, who lives two doors down from the house the jet hit, was home at the time and ran outside to see what had happened.
"I heard like a loud crash, and the whole house just shook," Gradwohl told The AP. "We got jackets on, ran outside and saw one of the houses completely set on fire."
She said planes fly low over the neighborhood every day but she had never worried about a crash.
The Embrarer EMB-500/Phenom 100 twin-engine jet, which seats six people, was on approach to Montgomery County Airpark, which is about a mile from the crash site, officials said. A team of NTSB investigators recovered the cockpit voice and flight data recorders from the downed plane.
The agency planned to look into everything that could have led to the crash, including crew experience and proficiency, training and procedures, equipment performance, weather and other environmental factors such as birds, Sumwalt said.
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