Boeing [BA] yesterday said it recently completed the first flight of the newest CH-47 Chinook–called the Mk6–heavy-lift helicopter for the United Kingdom’s Royal Air Force.

The March 15 flight, at the Boeing helicopter facility near Philadelphia, occurred ahead of schedule and confirmed initial airworthiness for the Mk6 Chinook.

“This is a truly impressive achievement for both Boeing and the project team,” said Capt. David Childs, Chinook Team Leader, U.K. Defense Equipment & Support. “To see the first aircraft fly less than 20 months after contract signature is a source of great pride for all those involved in this key project.”

Under a $1.65 billion contract, the United Kingdom is expected to add 14 Mk6 Chinooks, bringing the fleet to 60 Chinooks already in service in different configurations (Defense Daily, Aug 23, 2011). The fleet is being upgraded under Project Julius for compatibility with the Mk6.

The Mk6 Chinook features advanced technology including U.K.-specific avionics, a forward-looking infrared system, and interoperable communication and navigation equipment.

The aircraft now is undergoing comprehensive testing in Mesa, Ariz., before delivery to the United Kingdom later this year.