Engineering, 18.03.2020 22:30, ayri9893

During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check.
Under these circumstances, what would be the most logical initial action?

A. Check the results obtained with a leaner setting of the mixture.
B. Taxi back to the flight line for a maintenance check.
C. Reduce manifold pressure to control detonation.

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During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not a...