Final answer:
For an APU fire with the crew outside, emergency procedures include clearing the area, using the external APU fire extinguisher handle if possible, contacting emergency services, and maintaining a safe distance.
Step-by-step explanation:
Emergency Procedure for APU Fire When Crewmembers Are Outside the Aircraft
In the event of an APU fire when crewmembers are outside the aircraft, it is essential to execute the emergency procedure promptly and efficiently. The basic steps to be followed are:
- Notify all personnel in the vicinity to clear the area immediately.
- Ensure the APU fire extinguisher handle is activated if accessible and safe to do so from the exterior service panel.
- Contact the airport fire and rescue services without delay.
- Do not attempt to fight the fire unless trained specifically for such events and it is safe to proceed.
- Maintain a safe distance from the aircraft, as the intensity of the fire may escalate endangering surrounding personnel.
Moreover, the emergency response plan should be reviewed regularly by the crew to maintain readiness for such occurrences. All personnel should be aware of the location and operation of the external APU fire extinguisher activation points on the particular aircraft type they are working on.