Source: CBS News/AP

Updated on: January 1, 2025 / 2:42 AM EST

South Korean officials have vowed to find out what caused a Boeing 737-800 passenger jet operated by Jeju Air to crash into flames as it attempted to land over the weekend, killing all but two of the 181 people on board. Days after the crash, there were still far more questions than answers about the country's worst aviation disaster in decades.

Authorities ordered an immediate inspection of all 737-800 aircraft operated by the country's airlines -- dozens of planes in total -- following the crash, but there was still no clear indication as to whether a system malfunction, human error, or some combination of factors had caused the disaster.

Experts from the U.S. National Transportation Safety Board, the Federal Aviation Administration and Boeing were on the ground inspecting the crash site, and the NTSB was set to play a crucial role in deciphering data from the plane's "black boxes," which record information from the cockpit and aircraft systems.

Officials have warned it could be months before any clear answers emerge. Here is a look at what's known about the Jeju Air crash, and some of the key questions emerging in the wake of the tragedy.

Read more: https://www.cbsnews.com/news/south-korea-plane-crash-cause-investigation-key-questions/