Pratt & Whitney has received an $873.14m contract for the design, development and manufacture of turbofan adaptive engines in 45,000lb thrust-class.
Awarded by the US Air Force Life Cycle Management Center, Wright Patterson Air Force Base, the contract is due September 2021.
The total value of the deal, including a priced option, is $1.01bn.
A $1bn contract has been awarded to GE Aviation for the development of three-stream adaptive cycle engine as part of the Adaptive Engine Transition Program (AETP).
The AETP engine is intended for integration onto the US military's combat aircraft to enhance their performance capabilities.
The AETP programme started in 2007 and is expected to be completed in 2021.
L-3 Communications Mission Integration Division has been awarded an $32.45m foreign military sales contract to provide advanced engineering services.
The contract has been awarded by the US 645th Aeronautical Systems Group, Wright Patterson Air Force Base, and is due for completion in February 2018.
The US Air Force Space and Missile Systems Center, Los Angeles Air Force Base, has awarded a $24.36m modification contract to Harris Government Communications Systems in support of the Air Force' Space Control Depot Support.
The contract requires Harris to provide support services for nine additional programmes. The contractual work is scheduled for completion by early next year.