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Reported runway friction coefficient (if available), or
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Equivalent runway condition (if braking action and runway friction coefficient are not available).
Maximum Recommended Crosswind
Good (5) 0.40 and above Note 1 Max demonstrated
Good / Medium (4) 0.36 to 0.39 Note 1 30 kt
Medium (3) 0.30 to 0.35 Note 2 and Note 3 25 kt
Medium / Poor (2) 0.26 to 0.29 Note 2 and Note 3 20 kt
Poor (1) 0.25 and below Note 3 and Note 4 15 kt
Unreliable (9) Unreliable Note 4 and Note 5 5 kt
Table 1
Maximum Recommended Crosswind - Typical
The Equivalent Runway Condition, defined by Note 1 through Note 5, can be used only for the determination of the maximum recommended crosswind.
This Equivalent Runway Condition cannot be used for the computation of takeoff and landing performance, because it does not account for the effects of the displacement drag and impingement drag (as defined in the Flight Operations Briefing Note Landing on Wet or Contaminated Runway).
Note 1: Dry or wet runway without risk of hydroplaning.
Note 2: Runway covered with slush.
Note 3: Runway covered with dry snow.
Note 4: Runway covered with standing water, with risk of hydroplaning, or with wet
snow.
Note 5: Runway with high risk of hydroplaning.
Flight Operations Briefing Notes
Crosswind Landings
The maximum recommended crosswind on a contaminated runway is based on computation rather than flight tests, but the calculated values are adjusted in a conservative manner based on operational experience.
Some operators consider reduced maximum crosswind values when the first officer is PF, during line training and initial line operation.
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