The left engine of the US Airways flight that made an emergency landing in New York’s Hudson River last month was found to contain bird remains.

The National Transportation Safety Board announced the development Wednesday in an update to its investigation of what disabled Flight 1549’s engines on January 15.

Click here to watch a video of US Airways plane make emergency landing.

The organic material found in the right engine has also been confirmed to be bird remains.

The material from both engines will be sent to the Smithsonian Institution in Washington where the particular bird species will be identified.

The safety board also says that an engine surge experienced by the Airbus 320 two days before the accident was due to faulty temperature sensor. The sensor was replaced, and the engine was examined and found to be undamaged before being returned to service.

Click here for photos of the US Airways Hudson River crash.

Flight 1549's pilot reported that both engines had failed after the airliner collided with birds moments after taking off from LaGuardia Airport. All 155 people aboard survived.

The aircraft was moved from the barge where it had been docked in Jersey City, N.J. last week to a secure salvage yard in Kearny, N.J. where it will remain throughout the 12-18 month investigation.

The Associated Press contributed to this report.