NTSB Urges FAA to Review Wet Runway Landing Rules: What It Means for Air Passengers

The US National Transportation Safety Board has urged the US Federal Aviation Administration to review its approach to assessing wet runways during heavy rain. For passengers, this does not mean an immediate change in travel rules, but it explains why, during downpours, a flight may be delayed, go around, change landing airports, or wait for better conditions longer than seems logical from the aircraft cabin.

This new safety signal is particularly important at the start of the summer season, when aviation in many regions of the US and the world operates under the pressure of high demand, thunderstorms, tropical downpours, and tight schedules. This is not about panic or the idea that landing in the rain has suddenly become dangerous. Modern aviation has a multi-level risk assessment system, and crews regularly make decisions with a safety margin. However, the NTSB points to a specific weak spot: current calculations may not accurately enough reflect how quickly aircraft braking performance degrades on a wet runway as precipitation intensity increases.

At the center of the recommendations is the Runway Condition Assessment Matrix, or RCAM. This is a runway condition assessment matrix used to determine braking conditions and the required landing distance. To put it simply, the system helps crews and airports translate the actual state of the runway into understandable operational codes. These codes influence whether an aircraft can safely land in specific conditions, what distance it needs after touchdown, and whether an alternative scenario should be chosen.

What Exactly the NTSB Recommends

The NTSB published findings based on the analysis of 11 runway excursion incidents and accidents that occurred between 2008 and 2022 after landings on wet runways. The regulatory conclusion is quite technical, but its practical meaning is clear: actual tire grip on a wet surface during intense rain can be lower than some assessment models assume.

The Board issued three recommendations to the FAA. First, update the RCAM codes for wet runways so that they account for the gradual decrease in the braking friction coefficient as rain intensity increases. Second, add more detailed descriptions of precipitation intensity to aviation weather reports, particularly for situations where rain significantly exceeds the current "heavy rain" threshold of 0.3 inches per hour. Third, after updating such weather descriptors, incorporate them into the RCAM so that crews can better link actual precipitation intensity to runway condition.

Separately, the NTSB draws attention to the fact that when reviewing the matrix, the difference between smooth and grooved runways must be taken into account. This is an important detail: surface, drainage, runway profile, and the intensity of water on the surface can change the actual behavior of the aircraft during the landing roll.

Why This Is Important Specifically for Travelers

A passenger most often sees only the final result: the flight was delayed, the landing was postponed, the aircraft performed a go-around, or landed in another city instead of the planned airport. Within the aviation system, such decisions may be related not only to visibility or wind, but also to the assessment of the runway condition. During heavy rain, the crew must be certain that after touchdown, the aircraft will have enough distance for safe braking. If calculations show too small a margin or weather changes faster than data is updated, the more cautious option becomes the normal professional decision.

This is why the NTSB recommendations may have an indirect but noticeable impact on the passenger experience. If the FAA updates its approach to assessing wet runways, airlines and airports may receive more accurate criteria for operating during downpours. In some situations, this will help in making decisions more confidently, and in others, it will conversely push toward more conservative actions. For the traveler, this may mean that on a stormy day, a delay is not "over-caution," but the result of a specific safety calculation.

This topic is most significant for airports where intense rain, thunderstorms, or tropical humidity often occur during the season. If your route goes through major US hubs, it is useful to check not only the forecast in the destination city, but also the connection status. For example, for travel through Miami Airport, it is worth checking the MIA online board, and for flights through Georgia, the Atlanta Airport ATL page and the ATL board. For routes through Texas, the Dallas/Fort Worth Airport DFW pages and the DFW online board will be practical.

What Caused the Review

In its report, the NTSB explains that the problem does not lie with one specific airport or one airline. The Board reviewed a set of cases over a 15-year period where the common factor was landing on a wet runway and subsequent excursion beyond its limits. One example mentioned in recent coverage of the topic is a 2019 incident in Jacksonville, where a Boeing 737, after landing in heavy rain, overran the runway and ended up in the water. There were no serious injuries at the time, but the scenario itself showed how critical the accuracy of braking assessment can be.

The key technical point is that water on the runway affects the contact of the wheels with the surface. The more intense the rain and the poorer the water drainage, the higher the risk of reduced braking efficiency. For a passenger, this sounds like obvious physics, but in aviation, obviousness must be translated into formalized tables, weather reports, crew procedures, dispatcher training, and airport rules. The NTSB is essentially saying: the current system needs a more precise gradation so that heavy and very heavy rain are not reduced to an overly broad category.

Will Anything Change Immediately

It is important not to exaggerate the news. The NTSB recommendations are not an immediate change in rules for passengers and do not mean that flights during rain should be automatically canceled. The FAA stated that it is seriously considering the NTSB recommendations and also encourages airports to report wet runway conditions. Next comes a regulatory and technical process: assessment of proposals, possible changes to weather descriptions, matrix updates, procedure adaptation, and training.

For airlines, the consequences may be more noticeable than for the average passenger. Carriers will have to monitor how the regulator refines landing calculations, whether requirements for wet runway assessment will change, and how this will affect operations at airports with shorter runways or challenging weather conditions. For airports, the topic is also practical: surface quality, drainage, timeliness of runway condition reports, and the accuracy of weather data may become even more important elements of operational reliability.

How This May Affect Summer Travel

The summer season often creates a chain reaction effect. A thunderstorm in one hub can shift the schedule by several hours and affect dozens of destinations. If the need to more cautiously assess wet runways is added to this, passengers may more frequently encounter situations where the aircraft waits in a holding pattern, lands later, or departs with a delay because the crew needs to have not just "acceptable," but sufficiently stable conditions for landing.

This is not bad news for travelers. On the contrary, it shows how aviation safety evolves after the analysis of real incidents. Most passengers judge a flight by its punctuality, but the aviation system primarily evaluates the safety margin. If updated rules allow for better differentiation between a normally wet runway and a runway where water intensity already significantly reduces braking, it will help crews make decisions based on more accurate data.

Practical advice is simple: during the thunderstorm season, allow more time for connections, especially if flying through major hubs in the evening or to regions with frequent downpours. For international routes through the US, it is worth having a buffer of at least a few hours between flights, checking the airline app, airport status, and weather warnings. If you have separate tickets, the risk of missing the next flight due to a weather delay is significantly higher than in the case of a single booking.

Conclusion

The NTSB recommendations to the FAA regarding wet runways are technical, but very illustrative news for aviation tourism. It reminds us that flight safety depends not only on the aircraft and pilots, but also on the quality of weather data, runway condition, precipitation intensity, and how accurately this data is converted into operational decisions.

For passengers, the main conclusion is this: delays during heavy rain are not always a sign of chaos at the airport. Often, this is the result of a complex safety system that works specifically so that the flight ends safely. If the FAA implements the NTSB recommendations, the aviation industry will receive a more precise tool for operating in conditions of heavy downpours, and travelers will have another reason to treat weather delays as an unpleasant but sometimes necessary part of a safe journey.