The 582nd Helicopter Group completed Initial Operational Test & Evaluation for the MH-139A Grey Wolf on June 27, marking a major milestone in Twentieth Air Force’s efforts to modernize its helicopter fleet in support of nuclear security operations.
The completion of IOT&E was confirmed during a Joint Reliability and Maintainability Evaluation Team meeting, concluding a rigorous six-month evaluation period that began in January 2025. The test phase, conducted alongside multiple mission partners, demonstrated the Grey Wolf’s ability to meet operational requirements across a wide range of mission sets.