What is the minimum eFAD battery percentage required at the beginning of each duty period?

The minimum eFAD (Electronic Flight Bag) battery percentage required at the beginning of each duty period is 80%. This requirement ensures that the device has sufficient power to operate reliably throughout the flight and during any pre-flight activities, including checklists, charts, and performance calculations. Starting with a fully charged battery significantly reduces the risk of device failure during critical phases of flight and provides the crew with the necessary resources for decision-making and safety management.

Having a higher battery percentage as a minimum standard also accounts for any unforeseen power drains that may occur during a flight. The requirement is part of ensuring that all equipment supporting flight operations is fully functional and prepared for any operational needs that may arise during a duty period.