Final answer:
The FLT SPLRS message displayed in amber on the EICAS page refers to the Flight Spoilers on an aircraft's wings, and it is a cautionary message for pilots.
Step-by-step explanation:
The message FLT SPLRS displayed in amber on the EICAS page refers to the Flight Spoilers. Spoilers are devices on an aircraft's wings that disrupt the smooth flow of air, reducing lift and slowing down the aircraft. The amber color typically indicates a caution, warning, or advisory message that pilots should pay attention to.