Rolls-Royce has announced receipt of a contract from the U.S. Air Force for the purchase of AE 2100 engines and parts.

The contract for spare engines is worth more than $100 million but the number of engines covered and their delivery schedule were not disclosed.

Rolls-Royce said the spare AE 2100 engines and parts are for the Air Force's fleet of C-130J Super Hercules transports from Lockheed Martin and to support Foreign Military Sales program customers.

"Rolls-Royce AE 2100 engines provide the dependable, efficient power required by the U.S. Air Force and our allies to complete their transport missions with the C-130J fleet," said Tom Hartmann, Rolls-Royce's senior vice president of Customer Business. "We also successfully manage propulsion support for the Air Force to keep its C-130J fleet operating at peak efficiency, while continuing to focus on affordability for our customers."