From a Reuters report:
The last communication from one of the aircraft's pilots was "Mayday Mayday engine flameout", according to an air traffic control recording on liveatc.net.
The head of Taiwan's civil aviation authority, Lin Tyh-ming, said the aircraft last underwent maintenance on Jan. 26. The pilot had 4,916 hours of flying hours under his belt and the co-pilot had 6,922 hours, he said.