Final answer:
The recommended sequence for reducing power in an aircraft involves adjusting the manifold pressure and RPM controls in specific steps.
Step-by-step explanation:
When reducing power in an aircraft, the recommended sequence for using the manifold pressure and RPM controls depends on the specific situation and aircraft type. Generally, it is best to first reduce the throttle or manifold pressure to decrease the engine power output. This can be done by decreasing the throttle setting or closing the throttle valve. Then, the RPM controls can be adjusted to decrease the engine speed or revolutions per minute. This can be done by reducing the throttle or mixture control.