A yellow UFCP 1 FAIL caution advisory on the CAS display means what?

• A. The forward UFCP has automatically switched to the REPEAT mode due to a power source failure
• B. The forward UFCP is not communicating with IAC2
• C. The forward UFCP is not communicating with IAC1 or IAC2, or the unit has failed
• D. The forward UFCP has lost power its power source from the generator bus

Answer: (C)

UFCP 1 FAIL is signaling a fault in the forward UFCP’s ability to communicate. When a yellow caution appears, it means a non-critical fault that could affect how you control or read data from the cockpit interface. Specifically, this warning is raised when the forward UFCP cannot talk to the IAC controllers, either IAC1 or IAC2, or when the UFCP unit itself has failed. In other words, the system is telling you there’s a loss of communication somewhere in the UFCP path, or the UFCP hardware isn’t functioning.

This is why the best interpretation is that the forward UFCP is not communicating with IAC1 or IAC2, or the unit has failed. Other options describe power or mode issues that would present differently, such as a power loss warning or a mode-change indication, not a pure communication fault.