NTSB safety recommendation report on wet-runway overruns

… <div id="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_ctl02_label" style='display:none'>What Happened</div><div id="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_ctl02__ControlWrapper_RichHtmlField" class="ms-rtestate-field" style="display:inline" aria-labelledby="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_ctl02_label"><p>​​We are providing the following information to urge the Federal Aviation Administration (FAA) to take action on the safety recommendations in this report. They are derived from our investigations of 11 runway overrun accidents and incidents from a 15-year period, 2008–2022, that occurred after the airplanes involved landed on wet runways. The National Transportation Safety Board (NTSB) is issuing three safety recommendations to the FAA.<br><br></p></div> </div> <div id="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_whatWeFoundDiv"> <h2>What We Found</h2> <div id="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_ctl03_label" style='display:none'>What We Found</div><div id="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_ctl03__ControlWrapper_RichHtmlField" class="ms-rtestate-field" style="display:inline" aria-labelledby="ctl00_PlaceHolderMain_SafetyAlertDetailControlTemplate1_DisplayModePanel_ctl03_label"><p>​​The wheel braking friction coefficient corresponding to a wet runway can be substantially less than that specified by runway condition assessment matrix (RCAM) runway condition code 5 at Title 14 Code of Federal Regulations 25.109(c) due to limitations in the factors considered in the regulation, and therefore, wet-runway landing distances calculated using this wheel braking friction coefficient can underestimate the actual landing distances required and increase the risk of a runway overrun.<br></p><p>The runway condition assessment matrix would better represent the behavior of the maximum wheel braking friction coefficient on wet runways if progressively higher rainfall intensities corresponded to progressively lower runway condition codes. …