Regulations and Government
FAA Grants HOGE Utility Power STC for AW139
Defense systems on Boeing-Leonardo MH-139A triggered the need for multiple STCs.
Defense systems on Boeing-Leonardo MH-139A triggered the need for multiple supplemental type certificates. (Photo: Boeing)
Defense systems on Boeing-Leonardo MH-139A triggered the need for multiple supplemental type certificates. (Photo: Boeing)

The FAA has approved special operating conditions for the Boeing-Leonardo MH-139A Grey Wolf helicopter for the U.S. Air Force. The helicopter is based on the civil version of the Leonardo AW139 medium twin. This design feature incorporates a 2.5-minute all engines operating (AEO) power restricted for use at helicopter operating speeds below 60 knots indicated airspeed and hovering out of ground effect (HOGE).


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