The 2000 ft separation between FL290 and FL410 applies under which condition?

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Multiple Choice

The 2000 ft separation between FL290 and FL410 applies under which condition?

Explanation:
Vertical separation between flight levels depends on whether DRVSM is in effect in the airspace. In DRVSM airspace, the required gap between FL290 and FL410 is 1,000 feet. When DRVSM is not in effect, you follow the standard 2,000-foot separation. So the 2,000-foot separation applies in non-DRVSM airspace. Temperature effects can cause actual altitudes to differ from indicated flight levels, but they don’t change the regulatory minima—they simply require awareness and potential corrections to maintain safe separation.

Vertical separation between flight levels depends on whether DRVSM is in effect in the airspace. In DRVSM airspace, the required gap between FL290 and FL410 is 1,000 feet. When DRVSM is not in effect, you follow the standard 2,000-foot separation. So the 2,000-foot separation applies in non-DRVSM airspace. Temperature effects can cause actual altitudes to differ from indicated flight levels, but they don’t change the regulatory minima—they simply require awareness and potential corrections to maintain safe separation.

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