According to NFPA 402, what should be done if an interior aircraft fire cannot be extinguished immediately?

The correct choice discusses applying water spray to win and fuselage fuel tank areas exposed to heat. This approach is grounded in established fire suppression tactics, particularly in a specialized environment like an aircraft. When an interior fire is present and cannot be extinguished quickly, it becomes critical to prevent escalation and protect any potentially hazardous areas, such as fuel tanks, which could lead to larger explosions or fires.

Water spray can serve multiple purposes in this context: it cools and helps manage the temperature in areas surrounding the fire, thereby reducing the risk of fire spread and protecting structural integrity. Additionally, cooling fuel tanks can prevent the fuel from reaching its flash point, which is essential for maintaining safety during an already precarious situation.

While other options may suggest alternative approaches, their effectiveness in a direct fire scenario, particularly inside an aircraft, may not adequately prioritize the immediate threat posed by heat and fuel. The application of water spray in those critical areas is a proactive measure aimed at minimizing further risk while simultaneously managing the fire until it can be safely addressed.