How do you signal an APU/AMAD fire?

The appropriate way to signal an Auxiliary Power Unit (APU) or Airframe Mounted Accessory Drive (AMAD) fire is through the use of a lazy eight fire signal. This method is standardized and recognized across various military and aviation settings to communicate the urgency and nature of the emergency clearly.

Using a lazy eight signal involves moving your arms in a figure-eight motion, which is easily identifiable from a distance and conveys immediacy. Such signals are crucial in emergency situations where verbal communication may be compromised or where immediate visual recognition is needed to alert others to the danger.

Other methods like shouting "fire," blowing a horn, or waving a red flag might not effectively communicate the specific nature of the emergency or may not be recognized universally as an appropriate signal for this type of fire scenario. The lazy eight, being a standardized signal, serves to minimize confusion and ensure that all personnel understand the specific emergency being communicated, allowing them to take appropriate action quickly.