Flight service duties and responsibilities are divided into preflight, inflight and flight data. The term originates from the preflight checklists used by pilots. The astronauts underwent their final preflight physical examination on April 11. Several changes to preflight procedures and improved testing of gyroscope packages resulted. All preflight checks were concluded without discrepancies. The aircraft used for Jimmy Doolittle's 1922 transcontinental flight received preflight servicing at Kelly #1. During preflight, other information relevant to managing the flight plan is entered. Around 30 minutes prior to launch, preflight checks are conducted and aircraft engines are started. This precision enables NASA to compare CM/LAS flight performance with preflight predictions with high confidence. It took 40 weeks of preflight preparation. They will make sure the preflight settings match their specific production requirements. He was commissioned ensign, USNR-R upon completing Preflight. Eight private and state universities offered preflight (ground school) training. Phase one of the program included 12 weeks of "preflight training".