NAVAIR Patuxent River, MD – New Test Bed! A former Marine Corps Light Attack Helicopter Squadron 169 UH-1N Huey wraps up Integrated Maintenance Program rebuild at Marine Corps Air Station Camp Pendleton, Calif. Slated to become the only maritime science and technology test bed helicopter in DoD, the aircraft is scheduled to transfer in April to the Naval Rotary Wing Test Squadron (HX-21) here. At HX-21, “T-Rex” (Test Bed for Rapid Experimentation and Warfighter Support) will undergo test bed modification (installation of test racks and associated equipment) and start flying military, industry and academic technology projects for the Naval Aviation Center for Rotorcraft Advancement here.