What is necessary for operations on wet runways regarding thrust reversers?

For operations on wet runways, it is essential that thrust reversers must be operational if they are installed on the aircraft. This requirement is due to the increased potential for reduced braking effectiveness on wet surfaces, which can decrease the aircraft's ability to decelerate efficiently. Thrust reversers play a critical role in providing additional drag during the landing phase, helping to slow down the aircraft more safely and effectively when traction might be compromised.

If thrust reversers are installed, their proper functioning is crucial for ensuring safe operations, especially in adverse weather conditions, which is why they must be operational. Proper checks and tests of the system are typically performed as part of pre-flight protocols, but their mere presence on the aircraft mandates that they are functional for the safety of the flight when landing on wet runways.