What happened
During the final approach phase of a flight, the flight crew encountered an anomaly with the aircraft's avionics suite. Approximately ten minutes before the scheduled landing time, the crew observed a partial loss of functionality within the primary flight displays. This event occurred while the aircraft was in the terminal area, preparing to land at the destination airport.
The investigation
Following the incident, a thorough examination was conducted to determine the root cause of the display failure. Investigators reviewed the aircraft systems and operational data but were unable to identify any specific mechanical or electrical failure that would have caused the loss of flight display information. The investigation focused on whether a hardware defect or software glitch was responsible for the intermittent issue.
Findings
The manufacturer also conducted a review of the electrical system design associated with the flight displays. After analyzing the design specifications and the reported symptoms, the manufacturer concluded that there was no identifiable design failure within the electrical architecture that would lead to such display losses. This marked the third time the operator had reported this specific issue on an aircraft of the same make and model, suggesting a recurring but unexplained anomaly rather than a single catastrophic component failure.