What procedure can extinguish a Reduced Performance light after wheel slip has occurred?

Moving the master control handle to the coast position for more than two seconds is the appropriate procedure to extinguish a Reduced Performance light after a wheel slip has occurred. This action allows the system to reset or disengage the traction control mechanism that is activated during a wheel slip situation. By placing the master control in the coast position, you effectively remove the power from the traction system, allowing it to recover from the slip condition and reset any alerts or warnings associated with reduced performance.

Other options do not specifically address the need to reset the wheel slip condition effectively. For instance, reducing speed below 10 km/h may help in some scenarios, but it does not directly influence the system's readiness to return to normal operation. Engaging the emergency stop can be too drastic and may lead to system shutdown rather than addressing the wheel slip light specifically. Switching off the main power might indeed reset the system, but it is not a standard or practical method for resolving a reduced performance warning, which is better handled by the more targeted action of moving the control handle to coast.