NASA pilot Ed Lewis (rear) briefs NASA test pilot Dick Ewers on the flight instruments of NASA's YO-3A acoustics research aircraft prior to a checkout flight.
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NASA pilot Ed Lewis (rear) briefs NASA test pilot Dick Ewers on the flight instruments of NASA’s YO-3A acoustics research aircraft prior to a checkout flight.October 29, 2004NASA Photo / Tony Landis› YO-3A Project Description