NTSB Issues Recommendation Regarding Flight Data Recorder Accuracy Standards

The National Transportation Safety Board has issued a formal recommendation directed at the Federal Aviation Administration concerning the integrity of recorded flight data. Specifically, the board urges the agency to conduct comprehensive reviews of other airplane designs to ensure that flight control position data transmitted to the Digital Flight Data Recorder is accurately captured and preserved. A key concern highlighted in this directive involves the potential substitution of filtered data from systems such as the Engine Indicating and Crew Alerting System for accurate raw data. The recommendation emphasizes that filtered information should not replace precise measurements in official records, ensuring that safety investigations rely on unadulterated data sources when analyzing flight control positions.