sentences:  Returning to the United States and McCook Field in October 1926, he became chief of the Equipment Branch, Materiel Division of the Army Air Corps.In July 1927, he was appointed chief of the Instrument and Navigation Unit at the Materiel Division's new facilities at Wright Field.While stationed at McCook, he planned the first transpacific flight to Hawaii, then using his flight plan, flew the "Bird of Paradise" to Hawaii with 1st Lt. Lester J. Maitland on June 28–29, 1927, for which they won the Mackay Trophy.