Northrop Grumman Defense Systems has been awarded a modification contract for the operation and support of US Air Force (USAF) E-11A aircraft.

The $20.65m modification contract is an extension to a previously awarded cost-plus-fixed-fee contract for a four-month extension to support the aircraft.

The contract also provides for the operations and maintenance of the BACN payload and for the maintenance of the modified aircraft.

The E-11A, serial number 1-900, has been modified to carry the battlefield airborne communications node (BACN) payload.

ESC/HNAA, Hanscom Air Force Base in Massachusetts, US, will be the contracting activity.