U.S. Air Force deploys MH-139 for first nuclear mission

A United States Air Force MH-139 Grey Wolf executed its first operational mission on January 8 at Malmstrom Air Force Base, Montana, flying alongside convoys from the 341st Missile Security Operations Squadron.

The Air Force said the event marks the new aircraft’s initial integration into day-to-day nuclear security operations supporting the nation’s intercontinental ballistic missile fields.

According to the service, the helicopter was operated by crews from the 40th Helicopter Squadron, which is responsible for rotary-wing support across Malmstrom’s missile complex. The Air Force stated that the Grey Wolf’s first mission involved escort and protective functions during convoy activity, providing airborne security coverage and rapid-response capability for units transporting critical assets across remote terrain.

The MH-139 is a modernized, military-configured helicopter developed to replace the aging UH-1N fleet used for missile security operations. The platform offers increased speed, range and survivability compared to its predecessor, and includes upgraded avionics, improved communications systems and defensive enhancements intended for protection during nuclear security missions. The Air Force said the aircraft provides “an agile and survivable transport platform for tactical response forces to protect critical assets.”

As noted by the service, the transition to the MH-139 is part of a broader modernization effort supporting U.S. strategic deterrence. The Grey Wolf fleet will perform command-and-control support, convoy escort, security response and transport missions across several missile fields located in Montana, Wyoming and North Dakota. Malmstrom Air Force Base operates a portion of the Minuteman III missile system under the U.S. Department of War.

MH-139 Grey Wolf at Malmstrom Air Force Base, Montana, Jan. 8, 2026. (Photo by Jack Rodriguez Escamilla)

The Air Force said that integrating the MH-139 into operational use requires certification flights, aircrew qualification and phased transfer of mission responsibilities from the UH-1N. January’s mission was identified as the aircraft’s first operational deployment in support of missile-security tasking at Malmstrom. The service reported that the aircraft performed as expected during convoy escort activity and that the mission advanced the transition timeline.

The 40th Helicopter Squadron is one of the longest-serving rotary-wing units dedicated to strategic security missions. Its crews regularly support missile field operations across large distances and in variable weather conditions. The introduction of the MH-139 is expected to expand the squadron’s mobility and improve its ability to reach remote sites more quickly during security responses.

The 341st Missile Security Operations Squadron manages ground security for the missile complex and coordinates closely with helicopter crews during convoy and field-security missions. The squadron’s convoys transport personnel, equipment and sensitive components across rural areas surrounding Malmstrom. Airborne escort support is used to maintain overwatch, track movements and provide rapid reinforcement if required.

The Air Force stated that the first operational mission represents the beginning of routine integration of the Grey Wolf into missile security operations. Continued flights will include escort assignments, area-security patrols, training scenarios and support for evaluation events tied to nuclear security inspection requirements.

The MH-139 program has undergone extended testing and certification since its selection to replace the UH-1N. Development included modifications to meet defense-specific requirements for communications, navigation and survivability. The aircraft’s introduction at Malmstrom is the first step in fleetwide fielding across additional missile bases.