Fuel flow shutoff during an NP overspeed occurs at which location?

Fuel flow shutoff during an NP overspeed occurs at which location?

• A. PCL
• B. ODV
• C. LDS
• D. DEC

Answer: (B)

During an NP overspeed, the engine’s protective system automatically isolates fuel at the Overspeed Disconnect Valve. This valve sits in the engine fuel path, and its closure stops fuel flow to prevent further acceleration and potential damage to the powerplant, regardless of what the manual PCL is asking for. The PCL simply provides the commanded fuel flow, but the overspeed protection overrides it by shutting off fuel at the ODV. The other components mentioned do not perform this automatic shutoff during an overspeed event, as they serve different functions in the fuel control system.

During an NP overspeed, the engine’s protective system automatically isolates fuel at the Overspeed Disconnect Valve. This valve sits in the engine fuel path, and its closure stops fuel flow to prevent further acceleration and potential damage to the powerplant, regardless of what the manual PCL is asking for. The PCL simply provides the commanded fuel flow, but the overspeed protection overrides it by shutting off fuel at the ODV. The other components mentioned do not perform this automatic shutoff during an overspeed event, as they serve different functions in the fuel control system.