A CH-46E Sea Knight with Marine Medium Tiltrotor Squadron (VMM) 364 flies its last flight to Davis-Monthan Air Force Base, Ariz., Oct. 29. The aircraft was inducted into the 309th Aerospace Maintenance And Regeneration Group, an aircraft gravesite appropriately known as the boneyard. - A CH-46E Sea Knight with Marine Medium Tiltrotor Squadron (VMM) 364 flies its last flight to Davis-Monthan Air Force Base, Ariz., Oct. 29. The aircraft was inducted into the 309th Aerospace Maintenance And Regeneration Group, an aircraft gravesite appropriately known as the boneyard.