What light illuminates during a failure of the EP brakes?

During a failure of the EP (electronic pneumatic) brakes, both the Maintenance light and the Reduced Performance light are illuminated. The Maintenance light signals that there is a need for inspection or service due to a malfunction in the braking system, indicating that maintenance personnel should investigate the issue. Simultaneously, the Reduced Performance light indicates that the system is not functioning at full capacity and that safety or operational limits are being impacted.

Together, these indicators provide critical information to operators about the condition of the braking system, allowing for timely diagnosis, troubleshooting, and appropriate action to regain full operational capability while ensuring safety standards are maintained. This dual indication emphasizes the importance of monitoring both operational performance and maintenance needs in critical components like brakes.