1. Flights are much longer than two hours
“Majority of flight durations are longer than 2 hours and up to 12 hours - Critical information may be overwritten,” stated in the NTSB Safety Recommendation.
Many times pilot observations carry across several flights. Having this data available for analysis will help improve safety, training and flight efficiency.
“In many air accident and incident investigations, Cockpit Voice Recorder data for the critical phases of flight are not available. This illustrates the necessity to increase, sometimes significantly (15 to 25 hours), the duration of CVR recordings,” cited ICAO international.