What is the result of a fault in the DEC system?

A fault in the DEC (Digital Electronic Control) system typically leads to an abnormal light indication on the control box. This component is designed to monitor various parameters related to engine performance and efficiency. When there is a malfunction or fault detected, the system communicates this issue to the operator through visual indicators, such as warning lights on the control panel. These indications are crucial for diagnosing issues and ensuring timely maintenance or corrective measures are taken to prevent further complications.

The control box serves as a primary interface for the user to receive feedback from the engine’s electronic systems. Therefore, an abnormal light is a direct indicator of the DEC system's inability to function properly or diagnose the engine's operational status accurately.