| MH-139 Grey Wolf | |
|---|---|
 | |
| General information | |
| Type | Medium lift helicopter |
| National origin | Italy/United States |
| Manufacturer | Boeing Leonardo |
| Status | In service, in production |
| Primary user | United States Air Force |
| History | |
| Introduction date | 2020 |
| First flight | 2019 |
| Developed from | AgustaWestland AW139 |
TheBoeing MH-139 Grey Wolf is a twin-engine helicopter operated by theUnited States Air Force (USAF) for security and support missions. Developed byBoeing, the Grey Wolf is a variant of theLeonardo AW139, an Italian-built multi-role helicopter.
On 24 September 2018, theU.S. Air Force awardedBoeing a $2.4 billion contract to replace the agingUH-1N helicopter fleet, with the goal of enhancing security patrols of nuclear missile fields and transporting senior officials.[1] This was the first major acquisition for theAir Force Global Strike Command in its 10-year history, following the cancellation of the previous Common Vertical Lift Support Program (CVLSP).[2][3] As part of this initiative, Boeing was awarded a $285-million contract to build the first 13 MH-139A Grey Wolf helicopters, to guard America's nuclear ballistic missiles.[4][5]
The MH-139A Grey Wolf is to be used for security patrols,search and rescue missions, and personnel andcargo transport.[6] The Air Force's first intention was to purchase 84 helicopters for security and transportation across extensiveintercontinental ballistic missile (ICBM) fields, and senior leader and executive airlift in theAir Defense Identification Zone (ADIZ), also known as theNational Capital Region. It is also to be used in aircrew survival training.[7]
The precise quantity of the MH-139 fleet remains unknown. Initially, the requirement was for up to 84 helicopters, which was then reduced to 80, then 74. The most recent Fiscal Year 2025 budget suggests a further reduction, to a fleet of 36 MH-139s.[8] The Grey Wolf program has faced numerous setbacks and delays, including difficulty with attainingFederal Aviation Administration type certification. Typically, FAA certification is not required forUS military aircraft, but it is for the MH-139 because the helicopters are to be required to operate extensively withinUS domestic airspace.[9]
The MH-139A Grey Wolf features military and commercial system integration capabilities that play a crucial role in the Grey Wolf program.[10] It features an integrated training system based on existingAW139 operational flight trainers. Its sustainment tools ensure seamless USG interfaces. A global Commercial/DoD support system ensures efficient parts procurement. The unique design enables maintainers to conduct allaircraft maintenance at the operational level.[11]
The helicopter is propelled by twoFADEC-controlledPratt & Whitney Canada PT6 turboshaft engines, housed in separate engine turbine burst containment boxes, each with independent inputs to the main gearbox. The engines'infrared signature has been decreased by lowering airflow and using a directed exhaust, reducing plume impingement upon the tail fuselage.[12]
In March 2024, the first field-ready MH-139 Grey Wolf arrived at Montana’sMalmstrom Air Force Base.[13] The341st Missile Wing captured footage of Malmstrom's first Grey Wolf arriving at the base.[14] The908th Airlift Wing introduced the MH-139A Grey Wolf helicopter atMaxwell Air Force Base on 31 May 2024.[15] On 1 September 2023, the Pentagon issued a Selected Acquisition Report outlining plans to reintroduce 14 MH-139A Grey Wolf helicopters into theAir Force's program, bringing the total to at least 56 aircraft. This reverses a previous decision to cut the buy to 42 helicopters in the 2025 fiscal year, helping avoid a critical cost breach underNunn-McCurdy.[16][17] The MH-139 completed its first operational mission on January 8, 2026, when two US Air Force MH-139A helicopters escorted a column of missile maintenance and armored security vehicles to and from aMinuteman III launch facility.[18]
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