In which of the following situations should ARFF prepare for a hot brake situation?

In a hot brake situation, the concern arises when an aircraft may have been subjected to excessive heat during braking, often due to a malfunction or improper operation. When an aircraft has problems with the engine thrust reverser, it might not be able to adequately slow down after landing or during taxi operations. This situation can lead to increased reliance on the wheel brakes to bring the aircraft to a stop, which generates additional heat. If the brakes overheat, they could ignite or fail, creating a hazardous situation that requires immediate response from Airport Rescue and Fire Fighting (ARFF) teams.

The other scenarios do not present the same immediate risk of hot brakes. An aircraft taking off successfully typically would not have landing gear issues. Similarly, an aircraft landing without issues would suggest that normal landing procedures, including braking, have been correctly executed. Lastly, an aircraft flying with a broken wing does not inherently imply a hot brake situation unless it has also experienced braking issues, which isn't specified. Therefore, ARFF would be primarily alerted to prepare for a hot brake incident when thrust reverser problems are at play, as this directly impacts the braking efficacy.