When an engine instrument enters the caution range, what color does the indicator show, and what color does it show for a warning?

• A. Amber, then Red
• B. Green, then Amber
• C. Red only
• D. Blue then Amber

Answer: (A)

Engine gauges use color to indicate status: amber for caution and red for warning. When a parameter enters the caution range, amber signals that something is off-nominal but not immediately dangerous, so you should monitor it and be prepared to take corrective action. If the parameter reaches the warning range, red indicates an urgent condition that requires immediate action to protect engine and safety. This color progression helps you prioritize responses under pressure. So, the sequence is amber first, then red.