If a pilot needs to use the lavatory, how many flight attendants must be present to open the Flight Deck door during the flight?

When a pilot needs to use the lavatory during a flight, safety protocols require that two flight attendants be present to open the Flight Deck door. This procedure is in place to ensure that the flight deck is secure and only authorized personnel have access. The need for two flight attendants helps to maintain a proper level of security by enabling one attendant to verify the identity of the pilot or any other personnel needing access while the other assists with the door operation. This dual presence acts as both a measure for safety and a deterrent against unauthorized entry, reinforcing the importance of safeguarding the flight deck during all phases of flight.