240. While underway on a slow-speed propulsion diesel, the duty engineer is alerted to a high scavenging air temperature at one cylinder. Which of the following could be a possible cause?

A scavenge air box fire at the piston underside directly causes high scavenging air temperature in that cylinder, differentiating it from common system failures affecting all cylinders. Exhaust valve leakage primarily results in high exhaust temperatures, while cooler malfunctions and exhaust valve issues impact all cylinders or the exhaust stream, respectively.