Taiwan's Aviation Safety Council said that the pilots may have shut down one engine in an attempt to restart both engines.
from Travel Feedly http://www.ibtimes.com/transasia-flight-235-flight-data-show-engines-lost-power-crash-restart-attempt-failed-1807574
from Travel Feedly http://www.ibtimes.com/transasia-flight-235-flight-data-show-engines-lost-power-crash-restart-attempt-failed-1807574