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US Navy NP Sgt. Nathan Maasen and Aviation Machinist's Mate Airman Bryan Goodman serialize turbo shaft engine for the CHE helicopter in the Hangar Bay of the amphibious assault ship USS Kearsarge LHD. en PERSIAN GULF Dec Sgt Nathan Maasen and Aviation Machinist's Mate Airman Bryan Goodman serialize turbo shaft engine for the CHE