Originally posted by
RR_NDB ...
NAV TCAS FAULT (2 h 10): ... it could be the consequence of an electrical power supply problem or of an external failure.
The BEA later rectified that comment, and the TCAS was found to have a self checking function that sampled all values and tested to see if they matched reality. Apparently they didn't, and the TCAS was inhibited to prevent the potential for mayhem. Note the graphic showing the cause, e.g. Cockpit effect messages without fault ... now incorrect and added in red.
