Naval Air Systems Command (NAVAIR) on Friday awarded Lockheed Martin [LMT] a modification worth up to $348 million for long-lead materials and support for 43 Lot 15 F-35s.

This Feb. 7 modification covers long-lead materials, parts, components and support necessary to maintain on-time production and delivery of 43 F-35s for non-Defense Department and Foreign Military Sales customers.

Two Israeli F-35 Adirs fly in formation after receiving fuel from a Tennessee Air National Guard KC-135, Dec, 6, 2016. (U.S. Air Force Photo)

The earlier award was a fixed-price-incentive-firm-target advance acquisition contract.

Work will be split among Fort Worth, Texas (30 percent), El Segundo, Calif. (25 percent), Warton, U.K. (20 percent), Orlando, Fla. (10 percent), Nashua, N.H. (five percent), Nagoya, Japan (5 percent), and Baltimore (five percent), and is expected to be finished by December 2023.

The funding obligated at time of award is split between $205 million for non-DoD participants and $143 million in FMS, with none set to expire at the end of this fiscal year.

This modification comes after NAVAIR awarded Lockheed Martin $172 million in late December to acquire long-lead materials, parts, and components for 28 Lot 15 F-35s with work due by the same December 2023 timeframe (Defense Daily, Jan. 2)