What is the purpose of the safety strap on an aircraft door?

The purpose of the safety strap on an aircraft door is primarily to ensure that the door is correctly stowed. This strap acts as a preventive measure, securing the door in its designated position when it is not in use, which can help prevent it from moving unintentionally during ground operations. Properly stowing the door is vital for the safety and functionality of the aircraft, as it minimizes the risk of the door being dislodged or becoming a hazard to personnel or passengers.

While other functions such as keeping the door closed during flight and stabilizing the door during boarding are important aspects of door operation and safety, they do not directly relate to the primary function of the safety strap. The strap's role in ensuring correct stowage emphasizes the importance of maintaining the aircraft's integrity and safety during operations.