Airman First Class Terrence A. Treutel distinguished himself by extraordinary achievement while participating in aerial flight as Pararescueman aboard an HH-43F helicopter near Bien Hoa Air Base, Republic of Vietnam on 3 December 1967.  On that date, Airman Treutel was called upon to rescue members of a US Army Long Range Reconnaissance Patrol in an extremely hostile jungle area 53 miles northwest of Bien Hoa.  The patrol had notified their headquarters by radio that they had been surrounded by a large hostile force and there was no possible escape route.  After two unsuccessful rescue attempts by the Army, Airman Treutel arrived over their position.  As the helicopter settled into a hover over the patrol, Airman Treutel was positioned in the exposed aft end of the aircraft to watch for hostile troop activity and also to return any encountered ground fire.  Airman Treutel kept the pilot constantly advised of the situation to the rear of the aircraft and was also ready to descend the hoist to render assistance to the ground party.  Airman Treutel remained at this precarious station for ten long minutes until the rescue was completed.  The professional competence, aerial skill, and devotion to duty displayed by Airman Treutel reflect great credit upon himself and the United States Air Force.