If an aircraft engine or APU "torches", what should you assume about the flight deck's awareness of the fire?

When an aircraft engine or Auxiliary Power Unit (APU) "torches," it indicates a significant and visible fire, often characterized by flames or burn patterns that are clear indicators of an incident. This kind of event usually generates alarms or warnings in the flight deck, notifying the flight crew of the critical situation.

Furthermore, flight crews are trained to recognize and respond to such emergencies promptly, which includes locating and addressing engine or APU fires. Therefore, it is reasonable to assume that the flight deck would be aware of a fire event, especially one as serious as a “torch.” Their training and the onboard systems are designed specifically to ensure that they are informed about such dangerous conditions instantly.

Given this understanding, the assumption that the flight deck is aware of the fire aligns with standard operational protocols and response strategies in aviation safety.