If ATC instructs an immediate level-off, what action should you take to hold the aircraft at the indicated altitude?

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Multiple Choice

If ATC instructs an immediate level-off, what action should you take to hold the aircraft at the indicated altitude?

When ATC says an immediate level-off, you want the aircraft to stop changing altitude and stay at the specified height. Activating the altitude-hold function on the MCP (ALT HLD) does exactly that: the autopilot maintains the present or the selected altitude using the barometric altitude input, preventing further climb or descent. This keeps you at the indicated level without requiring manual input, which is crucial for a clean, immediate level-off. Engaging heading hold would only lock in the aircraft’s heading, not its altitude. Setting a vertical speed would command a rate of climb or descent, which could overshoot or not hold the altitude precisely. Switching the autopilot off removes automated altitude control entirely, increasing workload and risk of drift.

When ATC says an immediate level-off, you want the aircraft to stop changing altitude and stay at the specified height. Activating the altitude-hold function on the MCP (ALT HLD) does exactly that: the autopilot maintains the present or the selected altitude using the barometric altitude input, preventing further climb or descent. This keeps you at the indicated level without requiring manual input, which is crucial for a clean, immediate level-off.

Engaging heading hold would only lock in the aircraft’s heading, not its altitude. Setting a vertical speed would command a rate of climb or descent, which could overshoot or not hold the altitude precisely. Switching the autopilot off removes automated altitude control entirely, increasing workload and risk of drift.

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