PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

When should Powered Crossflow be activated according to the Fuel Control Computer?

1. When a fuel imbalance of 100 lbs. develops

2. When a fuel imbalance of 200 lbs. develops

3. When the engines are at idle

4. When fuel pressure is low

The correct answer is: When a fuel imbalance of 200 lbs. develops

The Fuel Control Computer is designed to manage fuel distribution efficiently across the aircraft's fuel tanks. Activated Powered Crossflow is essential for maintaining balance and ensuring optimal performance during flight. It specifically engages when a fuel imbalance of 200 lbs. or more is detected between the wing tanks. This threshold is set to ensure that there is a sufficient discrepancy before initiating crossflow, as frequent adjustments could lead to unnecessary wear on the system and potential operational inefficiencies. In the context of aircraft operations, a balance of fuel weight on both wings is crucial for maintaining proper aircraft handling and stability during flight. By waiting until a 200 lbs. imbalance occurs, the system helps mitigate risks associated with minor fluctuations that could resolve themselves naturally without intervention. This strategic threshold supports the overall performance and safety of the aircraft, aligning with operational protocols aimed at optimizing fuel management. Thus, activating Powered Crossflow when a 200 lbs. fuel imbalance develops is the correct guideline that ensures the aircraft remains balanced and efficient.