Boeing stock was wavering on Wednesday as investors slowly pieced together what happened to the 787 jet that crashed in India almost a week ago.Investigations are focused on the engines and why the plane lost lift shortly after takeoff.

The crash could renew scrutiny of Boeing, which suffered a major blow to its reputation after 2018 and 2019 crashes involving its 737 Max planes.

The preliminary finding gives investigators a new line of inquiry as they study a crash that killed all but one of the plane’s passengers.