Question

What does the message 'DADC DATA INVLD' on the FMA mean?

1) The DADC data is invalid
2) The FMA is malfunctioning
3) The FMA is not receiving data from the DADC
4) The DADC is not functioning properly

Answer 1

The message 'DADC DATA INVLD' on the FMA usually means that the Digital Air Data Computer data is invalid, suggesting a DADC malfunction or a data transmission error.

Step-by-step explanation:

When the Flight Mode Annunciator (FMA) displays the message 'DADC DATA INVLD', it indicates that the DADC data is invalid. This means that the Digital Air Data Computer (DADC) is either not functioning properly or not providing accurate data to the FMA. To resolve this issue, a check of the DADC's operational status and its connections with the FMA might be necessary. It is crucial for the functioning of the aircraft systems that rely on accurate airspeed, altitude, and other air data measures provided by the DADC.