The aircraft had logged approximately 4,810 airframe hours and 1,571 takeoff and landing cycles[1][2] Twelve flight attendants were onboard, including lead flight attendant Li Na Li, along with four cockpit crew members and four relief cockpit crew members.On April 6, 1993, the McDonnell-Douglas MD-11 operating the service was making a slow left turn while cruising above the Pacific Ocean at 296 knots when about 20 minutes after the relief crew took over, one of the relief crew members, likely the captain, while attempting to fix a speed indicator issue, accidentally deployed the slats near the Aleutian Islands.At the time of the accident, passengers were either not wearing seat belts or had them loose, or were standing in the aisle, exacerbating the number and extent of injuries.Other contributing factors included the lack of pilot training in high altitude upset recovery, the light control force characteristics at cruising altitude, and the influence of the stall warning system engaging and disengaging during the oscillations on the pilot's control inputs.[2] The accident was featured in season 25 of the Canadian documentary series Mayday, titled "Cabin Chaos".