Keywords: US Navy 081029-N-9689V-002 viation Electrician's Mate 3rd Class Christopher Houston re-attaches a distributor harness to the environmental control system of an MH-60S Sea Hawk helicopter.jpg en SAN DIEGO Oct 29 2008 Aviation Electrician's Mate 3rd Class Christopher Houston assigned to the Blackjacks of Helicopter Sea Combat Squadron HSC 21 re-attaches a distributor harness to the environmental control system of an MH-60S Sea Hawk helicopter at Naval Air Station North Island The environmental control system allows the aircraft to heat its rotor blades in the event of ice formation while in flight U S Navy photo by Mass Communication Specialist 3rd Class Joshua Valcarcel/Released 2008-10-29 081029-N-9689V-002 Navy http //www navy mil/view_image asp id 65967 U S Navy photo by Mass Communication Specialist 3rd Class Joshua Valcarcel PD-USGov-Military-Navy Maintenance of military aircraft at Naval Air Station North Island Environmental control systems aircraft Helicopter Sea Combat Squadron 21 United States Navy |