When does the X-FER PUMP caution message turn on in the TH-73A?

When does the X-FER PUMP caution message turn on in the TH-73A?

• A. When fuel pressure is optimal
• B. The No. 2 cell runs dry
• C. When the transfer pump has failed
• D. Both B and C

Answer: (D)

The X-FER PUMP caution message is designed to alert the pilot to specific conditions relating to the fuel system's performance, particularly focusing on the functionality of the fuel transfer pump and the status of the fuel cells. The caution message activates under two primary scenarios: when the No. 2 fuel cell has run dry, which indicates that the fuel in that cell has been depleted and requires action to prevent engine starvation, and when there is a failure of the transfer pump itself. Each of these scenarios poses a risk to safe flight operations, as an inadequate fuel supply from the designated cell or a malfunctioning transfer pump could affect engine performance and lead to hazardous situations. Thus, the correct choice encompasses both conditions, emphasizing the system's design to prioritize pilot awareness and safety regarding critical fuel management issues. This functionality ensures that pilots are promptly informed about significant changes in the fuel system's status that require immediate attention.

The X-FER PUMP caution message is designed to alert the pilot to specific conditions relating to the fuel system's performance, particularly focusing on the functionality of the fuel transfer pump and the status of the fuel cells.

The caution message activates under two primary scenarios: when the No. 2 fuel cell has run dry, which indicates that the fuel in that cell has been depleted and requires action to prevent engine starvation, and when there is a failure of the transfer pump itself. Each of these scenarios poses a risk to safe flight operations, as an inadequate fuel supply from the designated cell or a malfunctioning transfer pump could affect engine performance and lead to hazardous situations.

Thus, the correct choice encompasses both conditions, emphasizing the system's design to prioritize pilot awareness and safety regarding critical fuel management issues. This functionality ensures that pilots are promptly informed about significant changes in the fuel system's status that require immediate attention.