Final answer:
The common maximum continuous limit line in the EICAS system is the yellow bar that stretches across gauge sets. The yellow limit line is generally the same for all parameters, except for the red line which indicates a critical limit or warning level.
Step-by-step explanation:
In the EICAS system, the common maximum continuous limit line is the yellow bar that stretches across gauge sets. This line represents the limit that should not be exceeded for a particular parameter, such as engine temperature or oil pressure. The yellow limit line is generally the same for all parameters, except for one exception - the red line.
The red line is different from the other yellow limit lines as it indicates a critical limit or warning level. If any parameter exceeds this red line, it signifies a dangerous situation that requires immediate attention and action. It serves as a visual cue to alert pilots or operators about a potential problem.
For example, in the case of engine temperature, the yellow limit line may represent the maximum continuous limit that the engine can operate within safely, while the red line may indicate the maximum limit that should not be exceeded under any circumstances to prevent engine damage or failure.