Boeing MH-139A Grey Wolf
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Boeing Helicopters

The MH-139A Grey Wolf program progressed through several structured phases. Four aircraft were built in 2019 as part of the Engineering & Manufacturing Development (EMD) stage to support design certification and testing, followed by two System Demonstration Test Aircraft (SDTA) completed in 2020 for operational evaluation. The Low-Rate Initial Production (LRIP) phase began with Lot 1, comprising 13 production-standard helicopters built between 2023 and 2025, including the first deliveries to the 908th Wing at Maxwell Air Force Base. Lot 2, initiated in 2025, adds seven additional aircraft, bringing the total to 20 LRIP units. Together with future Lot 3 production, these aircraft form part of the U.S. Air Force’s 34-helicopter order as the program advances toward full-rate production.