TRUE/FALSE: Once an engine is shutdown by the DECU via the BIM, overspeed protection is automatically inhibited on the second engine.

TRUE/FALSE: Once an engine is shutdown by the DECU via the BIM, overspeed protection is automatically inhibited on the second engine.

• A. TRUE
• B. FALSE
• C. N/A
• D. CANNOT TELL

Answer: (A)

When the DECU commands an engine shutdown through the BIM, the system intentionally inhibits the overspeed protection on the remaining engine. This interlock prevents the second engine’s protective trip from interfering with the shutdown sequence of the first engine, allowing the helicopter to transition to single-engine flight without a premature or unnecessary shutdown triggered by an overspeed condition on the remaining engine. In other words, during that shutdown maneuver the focus is on completing the engine-out procedure safely, and overspeed protection on the second engine is temporarily disabled as part of that process.

When the DECU commands an engine shutdown through the BIM, the system intentionally inhibits the overspeed protection on the remaining engine. This interlock prevents the second engine’s protective trip from interfering with the shutdown sequence of the first engine, allowing the helicopter to transition to single-engine flight without a premature or unnecessary shutdown triggered by an overspeed condition on the remaining engine. In other words, during that shutdown maneuver the focus is on completing the engine-out procedure safely, and overspeed protection on the second engine is temporarily disabled as part of that process.