Final answer:
A fault light on the ELAC, SEC, or FAC pushbuttons on the FLT CTL panel indicates a detected fault in the respective flight control computer system, requiring immediate attention and proper corrective action to maintain the aircraft's safety and airworthiness.
Step-by-step explanation:
When a pilot encounters a fault light on the ELAC, SEC, or FAC pushbuttons on the Flight Control (FLT CTL) panel, it indicates that a fault has been detected in the corresponding flight control computer system on an aircraft. These computers are responsible for managing the primary and secondary control surfaces of the aircraft to ensure stable and manageable flight. The ELAC (Elevator Aileron Computer) typically manages the ailerons and elevators, the SEC (Spoiler Elevator Computer) usually oversees the spoilers and elevators, and the FAC (Flight Augmentation Computer) typically controls the rudder and provides flight envelope protection among other functions.
If one of these computers has a fault, it informs the crew that there is a problem that could potentially affect the control surfaces it governs. This would prompt a series of troubleshooting steps as outlined by the aircraft's manual, potentially involving switching to alternate systems or reconfiguring the affected surfaces manually if possible. Corrective action is critical, as flight control system integrity is paramount to the safety and airworthiness of the aircraft.
It's also important to note that modern aircraft are designed with redundancy in mind, meaning that a single fault often does not lead to an immediate emergency. However, understanding the severity and implications of the indicated fault is crucial for safe continuation of flight, and the appropriate response would involve consultation of the aircraft's Flight Manual and, if necessary, communication with airline maintenance operations for guidance.