(concurring in result).
I ágree with Judge SMITH that the flight during which this accident occurred was not an undertaking of a civilian caretaker in performance of his responsibility for aircraft maintenance. Rather, it was a “proficiency flight”, a training activity, properly undertaken by Captain McCoy in his capacity as an officer of the Maryland Air National Guard.
*732The fact that any incidental observations this pilot might make concerning the performance of his plane would be communicated to and used by civilian technicians in the servicing or maintenance of the plane did not change the basic character of this training flight. Neither, as I see it, did it matter that the officer flying the plane had a second military responsibility as “squadron aircraft maintenance officer” and a separate and distinct civilian job at the airfield as a caretaker and aircraft technician. We all agree that in his capacity as a National Guard officer, whether functioning as a pilot or as the squadron aircraft maintenance officer, Captain McCoy was not a federal employee within the meaning of the Federal Tort Claims Act. I think it is irrelevant that as a civilian caretaker and mechanic he might put to use the information he had acquired during the performance of one or both of his other responsibilities as a National Guard officer.
The considerations and conclusions stated in the foregoing paragraph are a sufficient basis for reversing the judgment of the district court and requiring the dismissal of this action. Therefore, I do not reach the more difficult and far-reaching question, whether a civilian caretaker and technician, employed as provided in section 709 of Title 32, United States Code, is a federal employee within the meaning of the Tort Claims Act.
I join in the decision reversing the judgment of the district court, but without expressing any opinion upon that portion of the disagreement between my colleagues which concerns the status of civilian aircraft maintenance workers employed to care for federally owned planes while in the custody of National Guard units.