What is the FAA minimum for reserve fuel in a helicopter?

The FAA minimum for reserve fuel in a helicopter is indeed established at 20 minutes of flight time, which is why this choice is correct. This requirement is intended to ensure a sufficient safety margin in the event of unforeseen circumstances, such as weather changes, mechanical issues, or deviations from the planned flight route. The 20-minute reserve provides pilots with the capability to navigate to an alternate landing area if necessary, showcasing the importance of preparedness in aviation.

The rationale behind mandating this specific reserve fuel amount is to enhance safety. This reserve can be crucial in allowing a pilot to handle emergencies or return to an appropriate landing area without the constant worry of running out of fuel. Pilots should always be aware of their fuel consumption rates and plan accordingly to ensure they can maintain this reserve for every flight.

By contrast, other time periods such as 10 minutes, 30 minutes, or 15 minutes would not provide the same level of safety assurance based on the operational considerations and potential challenges faced during flight. Each helicopter operation can present unique risks, and the 20-minute reserve is a balanced compromise that prepares pilots for typical contingencies while avoiding excess weight and fuel concerns.