The US Air Force Global Strike Command (AFGSC) announced on August 31, 2026, that the Boeing MH-139A Grey Wolf helicopter reached initial operational capability (IOC) on August 10, 2026, clearing it for the intercontinental ballistic missile (ICBM) security mission it was procured to perform. The declaration formalizes the handover from the UH-1N Huey, which the US Air Force has flown in missile fields since 1970.
The Grey Wolf is a militarized derivative of the Leonardo AW139 twin-engine commercial medium-lift helicopter. Leonardo produces the baseline airframe at its plant in northeast Philadelphia, and Boeing, as prime contractor, installs the military equipment and handles post-delivery support. AFGSC said the Grey Wolf is nearly 50% faster than its predecessor, carries twice as many troops, and has improved defensive systems.
The Grey Wolf’s core task is escorting Minuteman III maintenance and armored security convoys. The Twentieth Air Force area of responsibility covers approximately 33,600 square miles (about 87,000 square kilometers) of prairie, plains, and mountain terrain across F.E. Warren Air Force Base in Wyoming, Malmstrom Air Force Base in Montana, and Minot Air Force Base in North Dakota.
The type flew its first operational convoy on January 8, 2026, when two aircraft from the 40th Helicopter Squadron escorted a movement more than 100 miles (over 161 kilometers) from Malmstrom and back over roughly six hours without refueling.
As of January 29, 2026, Boeing had delivered 21 MH-139As out of 38 under contract, with the first production aircraft handed over in August 2024. AFGSC also tied the helicopter to the coming transition from Minuteman III to the LGM-35A Sentinel, stating the Grey Wolf’s range and command-and-control systems are needed to secure sites through a phased transition. The Sentinel program targets its own IOC in the early 2030s. Beyond convoy escort, the Grey Wolf will also support search and rescue, disaster response, and medical evacuation.
