General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

What is the primary detection method for a wheel well fire?

1. Smoke detection

2. Temperature sensor

3. Fire detection

4. Visual inspection

The correct answer is: Fire detection

The primary detection method for a wheel well fire is fire detection. This method is designed specifically to identify the presence of fire through various technologies that can detect the heat and active flames associated with a fire. Fire detection systems utilize specialized sensors that can quickly respond to the extreme temperatures and combustion products, ensuring timely alerts for the flight crew to take appropriate action. While other methods like smoke detection are also important in aircraft safety, they may not be as effective in the wheel well area, primarily due to airflow patterns and the design of the wheel well itself, which can limit smoke accumulation. Temperature sensors can provide useful information about abnormal heat conditions, but they may not definitively indicate the presence of a fire without auxiliary input from a comprehensive fire detection system. Visual inspection can help in identifying issues but is not a reliable method for detecting a fire, especially in critical areas like the wheel well, where direct observation is limited. Thus, fire detection is the most effective and reliable means of ensuring safety in the event of a wheel well fire, providing both alerts and potential activation of fire suppression systems.