Test models are currently on track to be tested by the government this year.
“We just completely installed the interior this week,” said Sikorsky program director Spencer Elani. “Two test aircraft will get to the government this year for testing.”
Elani said this is a key milestone, as the test helicopters could not undergo advanced test flights without an interior.
The first new helicopter for the presidential fleet is should enter service in 2020, with all six aircraft expected to be complete by 2023.
Sikorsky, a unit of Lockheed Martin, was contracted four years ago to deliver the next set of VH-92A helicopters, known as Marine One when the president in onboard.
The billion-dollar upgrade comes at the right time, as the current presidential fleet consists of 19 helicopters, with the oldest built in 1975.
Elani said the new helicopters are much quieter so passengers can easily converse, adding that the helicopter is “a smooth and comfortable ride.”
Read more about the new presidential helicopter fleet at CNBC here.