If a pilot suspects engine detonation during a climb-out after takeoff, what should be the initial corrective action?

The initial corrective action in response to a suspected engine detonation during a climb-out is to lower the nose slightly to increase airspeed. This is important because engine detonation typically occurs when the fuel-air mixture ignites prematurely in the engine cylinders, which can be exacerbated by high temperatures and pressures. By lowering the nose, the pilot can reduce the angle of attack and increase airspeed, which allows for better cooling of the engine and a higher fuel flow, both of which can help mitigate the risk of detonation.

Increasing engine power would not be advisable, as it could lead to further increases in cylinder pressure and temperature, potentially worsening the situation. Reducing throttle immediately might lead to a rapid decrease in performance and may not effectively address the condition, as it could exacerbate any airflow and cooling issues. Banking to the left or right has no direct benefit regarding engine detonation and could compromise safety during a climb-out phase.

Overall, increasing the airspeed by lowering the nose is a reasonable and proactive measure to alleviate potential detonation by improving engine cooling and mixture conditions.