Israel’s privately funded mission to the moon ended in a crash landing Thursday, April 11. Since then, the SpaceIL team has been hard at work figuring out what exactly went wrong.

According to the Associated Press (AP), SpaceIL engineers decided as a group to restart the inertial measurement unit (IMU) after it malfunctioned during the descent. The IMU is a key piece to the landing puzzle, which makes up a component of the Beresheet spacecraft’s guidance system. This action may have caused a fatal chain reaction.

The team will continue their investigation, and issue a final conclusion on the matter in the coming weeks.

If the landing was successful, it would have been the first privately funded moon mission, with Israel becoming the fourth country to successfully land on the moon, following Russia, the U.S., and China.