Engine failure during flight: what is the first step in the procedure?

Engine failure during flight: what is the first step in the procedure?

• A. FUEL PUMP -> ON
• B. MIXTURE -> FULL RICH
• C. ALTERNATE AIR -> OPEN
• D. FUEL SHUT OFF -> OPEN

Answer: (B)

Maximizing the fuel for combustion is the first move when trying to restart a failed engine. Setting the mixture to full rich ensures the engine receives as much fuel as possible for the air it’s getting, which gives the best chance of ignition if fuel flow or ignition conditions are marginal. After establishing a rich mixture, you would then confirm fuel supply and ignition sources (for example, fuel selector on and the electric pump as needed) and attempt restart. Opening the alternate air valve isn’t helpful for a fuel-injected engine, and opening the fuel shut-off would cut fuel entirely, making restart unlikely.

Maximizing the fuel for combustion is the first move when trying to restart a failed engine. Setting the mixture to full rich ensures the engine receives as much fuel as possible for the air it’s getting, which gives the best chance of ignition if fuel flow or ignition conditions are marginal. After establishing a rich mixture, you would then confirm fuel supply and ignition sources (for example, fuel selector on and the electric pump as needed) and attempt restart. Opening the alternate air valve isn’t helpful for a fuel-injected engine, and opening the fuel shut-off would cut fuel entirely, making restart unlikely.