Eurocopter HH-65/MH-65 Dolphin Fleet Technical Brief & Avionics Logistics

Serving as the primary short-range recovery asset in the U.S. Coast Guard fleet, the twin-engine Eurocopter MH-65 Dolphin operates aboard commissioned cutters across the Pacific, Atlantic, Gulf of Mexico, Hawaii, and Great Lakes regions. Selected to replace the aging Sikorsky HH-52A Sea Guard, the American-built variant of the French Eurocopter SA366 G Dauphin achieved its maiden flight in July 1980 and entered active Coast Guard service in November 1984. Built by American Eurocopter in Grand Prairie, Texas, the fleet maintains 100 active airframes following conversion projects that upgraded 95 aircraft and built seven new Multi-Mission Cutter Helicopter (MCH) variants.

Key Technical Specifications & Platform Modernization

• Crew & Flight Deck Architecture: Configured for a three-person crew (pilot, co-pilot, flight mechanic/hoist operator) with a semi-glass cockpit incorporating augmented radar, electro-optical/infrared sensors, and maritime domain awareness data exchange links similar to heavy transport rotorcraft.
• Avionics Upgrade Program: Beginning with the MH-65E fleet rollout, airframes transition to full digital glass instruments and modernized navigation suites meeting strict Federal Aviation Administration standards, indexed under verified CAGE code entries.
• Tactical Armament Capabilities: Armed with an M107-based .50-caliber precision fire weapon and a belt-fed Fabrique Nationale Herstal M240B 7.62mm machine gun for tactical law enforcement.
• Upgraded Turboshaft Propulsion: Powered by dual digitally-controlled Turbomeca Arriel 2C2-CG engines generating 40% more power than original LTS 101 engines, delivering a top speed of 165 knots, a 15,000-foot service ceiling, and a 356 nautical mile range cataloged in our FSC supply inventory.

Why Does Maritime Exposure Accelerate Component Wear?

Operating over open sea spray and from rolling cutter decks subjects the MH-65 platform to intense physical degradation:

Turbine Salt-Air Oxidation: Ingesting atomized salt fog through the Turbomeca Arriel engine inlets causes thermal breakdown across compressor vanes and turbine blades.

Vibration Load from Armament Firing: Rapid bursts from .50-caliber and 7.62mm weaponry transfer mechanical fatigue across cabin door tracks and airframe skin fasteners.

Hoist Actuator & Hydraulic Fatigue: Continuous high-frequency search-and-rescue hoist deployments accelerate seal degradation within hydraulic motors and control assemblies, mirroring wear profiles seen in utility training rotorcraft.

How to Procure Hardware via Just NSN Parts

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