McCulley was the pilot on mission STS-34. The crew aboard Shuttle Orbiter Atlantis launched from Kennedy Space Center, Florida on October 18, 1989, and landed at Edwards Air Force Base, California, on October 23, 1989. During the mission crew members successfully deployed the Galileo spacecraft on its journey to explore Jupiter, operated the Shuttle Solar Backscatter Ultraviolet Instrument (SSBUV) to map atmospheric ozone, and performed numerous secondary experiments involving radiation measurements, polymer morphology, lightning research, microgravity effects on plants, and a student experiment on ice crystal growth in space. Mission duration was 4 days, 23 hours, 41 minutes.
