Rating Newest Oldest. Best Answer: Once muscle contraction starts the regeneration of ATP must occur rapidly. There are three primary sources of ATP which, in order of their utilization, are creatine phosphate (CP), anaerobic glycolysis, and oxidative phosphorylation. Energy from ATP derives from cleaving of the terminal phosphate of the ATP molecule.
Under the new rules, pilots will be able to be on duty for nine to 14 hours â a number that will fluctuate based on factors such as when the pilotâs day begins and how many segments he or she will fly in one day. Pilots will be able to fly no more than nine hours during that period.
Eight or nine hours, but it doesn't always work out that way. The Federal Aviation Administration has kept tabs on the work schedules of commercial pilots since at least the 1950s. In those days, major airlines couldn't keep their flight crews working for more than 30 hours in a week or 100 hours in a month.