Altitude Hold, Hover, Stabilization and Auto Pilot (AHHS-AP) System

From Hover Coupler to Full Auto Pilot

The Altitude Hold, Hover Stabilization and Auto Pilot (AHHS-AP) System provides a low-cost solution for reduced pilot workload, increased flight safety, improved operational capability, and situational awareness particularly during low visibility conditions.

The AHHS-AP provides hands-free cyclic and collective control for cruise, automatic approach, low-altitude hover operations, precision hover and drift control, automatic descend to land, and automatic go-around. AHHS-AP delivers precise control capabilities that allow aircrews to safely operate in environments that would otherwise be impossible, such as brownout/whiteout conditions, overwater hover operations, and tight landing zones. AHHS-AP integrates with the aircraft’s existing flight control systems and is capable of interfacing with a myriad of on-board sensor inputs including barometric and radar altimeters, navigation and flight management systems, embedded GPS/INS, accelerometers, gyros, and data bus architectures.

Leonardo DRS has over 25 years of experience in development, integration, production and sustainment of AHHS systems, with proven performance around the globe. The result is an efficient, cost-effective solution that significantly enhances flight safety and operational capabilities, making it the after-market flight control enhancement system of choice on special operations and combat rescue helicopters.


  • World’s only proven off-the-shelf capability available today
  • A combat proven DVE mitigation system since 1992 with special operations and rescue forces worldwide
  • Provides cost-effective automated flight control capability that can standardize UH-60 fleet flight performance and training with the UH-60M
  • Enhances performance by enabling aircraft to function in expanded operational envelopes
  • Modular bolt-on design
  • No structural or flight control modifications required
  • Can be fielded as a stand-alone federated system or integrated into a digital avionics configuration
  • Integrates with existing flight control/trim systems and adds collective control/trim
  • Full 4-axis autopilot when coupled to a flight management system
  • Qualified to MIL-STD-810E and MIL-STD-461D


Airborne & Intelligence Systems

Networked Communications 2601 Mission Point Blvd, Suite 250
Beavercreek, OH 45431

+1 937 306 3375