Partial Power Descent 

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The normal method of losing altitude is to descend with partial power. This is often termed “cruise” or “enroute” descent. The airspeed and power setting recommended by the airplane manufacturer for prolonged descent should be used. The target descent rate should be 400 – 500 f.p.m. The airspeed may vary from cruise airspeed to that used on the downwind leg of the landing pattern. But the wide range of possible airspeeds should not be interpreted to permit erratic pitch changes. The desired airspeed, pitch attitude, and power combinationshould be preselected and kept constant.