What happened
On September 3, 2010, a Boeing 747-44AF cargo aircraft, registration N571UP, experienced a catastrophic sequence of events during flight near Dubai. The incident began when an uncontained fire broke out within a cargo compartment. In response to the emergency, the crew activated the fire suppression system and initiated an emergency descent.
As the aircraft descended, smoke entered the flight deck, significantly reducing visibility for the crew. During the attempt to manage the emergency, the crew encountered various system anomalies, including issues with the aircraft' and the crew oxygen systems. The situation escalated when the captain became incapacitated. While the first officer attempted to manage the aircraft and communicate via radio frequencies, the flight path became unstable. After a missed approach at Dubai International Airport, the aircraft overflew the runway and attempted a diversion to Sharjah International Airport. During this maneuver, the aircraft entered an uncontrolled descent and struck the terrain.
The investigation
The GCAA AAIS investigation focused on the progression of the fire and the subsequent loss of control. Investigators examined the aircraft's flight data, cockpit voice recorder, and the physical wreckage. A significant portion of the inquiry analyzed the accessibility of emergency equipment and the functionality of the crew's life-support systems.
Testing was conducted to evaluate how easily a pilot could don oxygen masks and smoke goggles while managing other emergency tasks. The investigation also scrutinized the physical layout of the cockpit, specifically looking at how the placement of the jumpseat and the arrangement of the emergency equipment cabinet hindered the crew's ability to respond to the fire and the captain's medical emergency.