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

If the cowl anti-ice switch is turned ON with the APU as the bleed air source, what caution message appears?

1. BLEED MISCONFIG

2. BLEED FAULT

3. ICE DETECTED

4. WING ANTI-ICE FAIL

The correct answer is: BLEED MISCONFIG

When the cowl anti-ice switch is turned ON using the APU as the bleed air source, the caution message that appears is "BLEED MISCONFIG." This occurs because the aircraft's systems are designed to recognize that the bleed air configuration is not appropriate for the selected anti-ice function. In this case, the cowl anti-ice system requires bleed air from an engine rather than from the APU when the aircraft is operating in a normal configuration. The BLEED MISCONFIG caution serves as an alert to the pilots that the bleed air source is not set up correctly to provide the necessary heating for the cowl anti-ice system to function effectively. Understanding this caution message is crucial for safe flight operations, particularly in cold weather conditions or when ice is expected. It emphasizes the need for pilots to ensure proper bleed air settings for the aircraft's systems to operate safely and effectively.