MH-139 Grey Wolf Reaches IOC as US Air Force Begins UH-1N Huey TransitionThe US Air Force has declared the MH-139 Grey Wolf operational at the Initial Operational Capability (IOC) level, marking a major transition away from the Vietnam-era UH-1N Huey.The new helicopter provides improved defensive capabilities, approximately 50 percent greater speed, and twice the troop-carrying capacity of the aircraft it replaces. These improvements make it suitable for airborne security, convoy protection, and rapid-response missions supporting the land-based component of the US nuclear triad.The Grey Wolf will also perform search-and-rescue, disaster-response, and medical-evacuation missions.Grey Wolf OperationalizationThe twin-engine helicopter achieved IOC on August 10, according to an Air Force announcement issued on August 31. The milestone followed extensive testing, conversion training, and operational preparation conducted by the 582nd Helicopter Group (HG).In January 2025, the 550th Helicopter Squadron completed the MH-139’s first Initial Operational Test and Evaluation flight.A year later, the aircraft escorted maintenance and armored-security vehicles during the first operational Minuteman III intercontinental ballistic missile convoy. The convoy covered more than 100 miles (161 kilometers) during a six-hour movement without requiring refueling.MH-139A Grey Wolf SpecificationsFollowing a four-aircraft order placed in January 2026, Boeing has received orders for 38 Grey Wolves from the US Air Force.The MH-139A is based on Leonardo’s AW139 15-seat commercial helicopter, modified specifically for protecting US nuclear and ballistic-missile infrastructure.The helicopter is 54.8 feet (16.7 meters) long and 16.4 feet (5 meters) high, with a maximum takeoff weight of 15,432 pounds (7,000 kilograms).It can cruise at up to 146 knots (270 km/h or 168 mph) and reach a maximum speed of 167 knots (309 km/h or 192 mph). Its maximum range is 410 nautical miles (472 miles/759 kilometers), while its service ceiling reaches 20,000 feet (6,096 meters).
