Arrab (first time caller!);
Ref the FUEL caption, there isn't any historical display information available from the CPDS, so we won't know if it or any captions came on or not.
As far as the fuel probe issue, you're nearly there, …
They don't say, "Yellow fuel caption may not come on", they say;
"Tests have confirmed that the affected fuel content probes generate erroneously high signals if contamination with water occurs. In each case an incorrect frequency is being transmitted to the indicating system. That leads to an erroneously high indication of fuel quantity and prevents the amber FUEL caution light from operating."
http://www.airbushelicopters.com/sit...18-Rev0-EN.pdf
Surely that 0.4 litres of fuel remaining in the no2 supply tank would have indicated a water contamination issue, as would the 95 litres left in the main (where the supply fuel came from).
No contamination issues are mentioned in the report, nor are the twist grip positions.