Overview

• UA507 departed San Francisco on June 21 and after eight hours in flight experienced a sudden descent to 6,400 meters over the Atlantic Ocean.
• The crew issued a squawk 7700 distress signal and diverted the Boeing 777 to Keflavík International Airport, landing safely on June 22.
• United Airlines identified a mechanical problem as the cause of the emergency landing on the 26-year-old aircraft.
• All 275 passengers and 14 crew members disembarked without injury and were placed on a subsequent flight to Rome.
• The incident highlights the effectiveness of aviation safety protocols and spotlights growing concerns over the performance of older Boeing 777 models.