What is the primary function of the Thermal Containment Bag (TCB)?

The primary function of the Thermal Containment Bag (TCB) is to contain heat and fire. This specialized bag is designed to encase lithium-ion batteries or other heat-generating devices that might pose a risk of fire during a flight. When a device within the bag overheats or catches fire, the TCB prevents the flames from spreading to other areas, thus aiding in the safety of the aircraft and maintaining a controlled environment.

The effectiveness of the TCB lies in its ability to contain heat, smoke, and potential flames, allowing crew members to safely manage hazardous situations. This containment is crucial during flight, where the safety of passengers and crew is the highest priority.

While the other options relate to safety or emergency measures in different capacities, they do not reflect the TCB's specific purpose. Storing equipment may be a function of various bags or containers, providing oxygen is generally associated with emergency oxygen systems, and extinguishing fires is typically managed through fire extinguishers or other dedicated firefighting equipment. The TCB's unique function centers specifically around thermal containment, making it an essential tool in the context of inflight safety.