When does the EFIS demonstrate unusual attitude information on the EADI?

The EFIS (Electronic Flight Instrument System) demonstrates unusual attitude information on the EADI (Electronic Attitude Director Indicator) when specific parameters are exceeded that indicate a potential loss of control or a departure from normal flight attitudes. In this case, the correct choice highlights the thresholds of exceeding 65 degrees of bank, 30 degrees of nose high, or 20 degrees of nose low as indicators that the aircraft may be in an unusual attitude.

These specific thresholds are critical because they represent limits beyond which normal flight operations can be compromised, leading to potential safety concerns. The EFIS is designed to alert pilots to these conditions, allowing them to take corrective action before the situation worsens. This feature is especially important in maintaining situational awareness and ensuring safe flight operations.

The other options do not accurately reflect the criteria established for unusual attitude indications by the EFIS. For instance, exceeding 50 degrees of bank might not adequately cover the range of potential unusual attitudes that pilots need to be aware of, while flight speed parameters and adverse weather conditions do not directly correlate with attitude alerts managed by the EADI. Thus, the emphasis on specific attitude thresholds in the correct choice is vital for promoting safe flying practices.