In the event a fusible plug melts, what action is recommended for the affected tire?

When a fusible plug in a tire melts, it indicates that the tire has been subjected to excessive heat, which can compromise the integrity of the tire structure. The purpose of the fusible plug is to release air pressure when the temperature exceeds a certain threshold, preventing a catastrophic blowout. Once the fusible plug has melted, it is a clear sign that the tire's safety has been compromised, potentially leading to further structural failure.

Scrapping the tire is the recommended action because using a tire that has experienced such heat-related damage poses significant risks, including the likelihood of blowout during operation or failure to maintain proper inflation, both of which could threaten safety during flight. Repairing a tire that has suffered fusible plug damage is not advisable as it cannot reliably return to its original state of safety and performance. Reinflating or continuing to use the tire does not address the underlying issue of compromised structural integrity and could cause serious accidents.

Thus, scrapping the tire ensures that maintenance personnel prioritize safety and uphold standards for flight operations by removing any components that could potentially endanger the aircraft or its occupants.