The interaction between the pilot, airplane, and the
environment is greatly influenced by the purpose of each
flight operation. The pilot must evaluate the three previous
areas to decide on the desirability of undertaking or continuing
the flight as planned. It is worth asking why the flight is being
made, how critical it is to maintain the schedule, and if the
trip is worth the risks.
On a ferry flight to deliver an airplane from the factory, the pilot
calculated the groundspeed and determined he would arrive at
the destination with only 10 minutes of fuel remaining. A check
of the weather revealed he would be flying into marginal
weather conditions. By asking himself whether it was more
critical to maintain the schedule or to arrive with an intact
aircraft, the pilot decided to schedule a refuel stop even though
it would mean he would not be able to keep to the schedule.
He chose not to “stretch” the fuel supply in marginal weather
conditions which could have resulted in an emergency landing.