How is the Power Control Lever (PCL) connected to the Fuel Control Unit (FCU)?

• A. The PCL sends a signal to the EPECS which controls the FCU
• B. The PCL is directly connected to the FCU
• C. The PCL controls the electronic fuel pumps only
• D. The PCL has no connection to the FCU

Answer: (A)

In the PC-12 NGX, the throttle command from the cockpit isn’t sent directly to the fuel metering unit. The Power Control Lever position is converted into an electrical signal and fed to the Electronic Propulsion Control System. The EPECS then interprets that signal, checks engine parameters, and sends the appropriate control signals to the Fuel Control Unit to meter fuel. This electronic path allows proper protection, monitoring, and precise fuel scheduling across operating conditions. So the PCL’s role is to signal the EPECS, and the EPECS controls the FCU.