snowonice
FAA regulations do not require aircraft manufacturers to account for contaminated runways, therefore this data is not contained in the AFM. Boeing does supply limited data in the operations manual and the QRH. This data comes in two forms, one is “planned landing” distance and the other is “actual landing” distance.
The QRH charts are usually “actual landing” distances for use in flight, they do not account for the 60/40 rule and should be corrected accordingly prior to flight. Once you are in flight you can theoretically use these landing distances without correction. But as John_Tullamarine has explained, you must treat unfactored landing distances with extreme caution; they are seldom achievable in normal airline operations.
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