WASHINGTON– Two Inertial Reference Units (IRUs) failed on a United Airlines (UA) Boeing 787-8 shortly before the aircraft experienced a rapid altitude shift over Africa on 24 January 2025, injuring 16 people. On March 18, the National Transportation Safety Board (NTSB) revealed the actual findings in a preliminary accident report.
According to the report, the jet’s left IRU failed approximately 1 hour and 5 minutes before the altitude upset. This was followed by the…
