Federal investigators are holding a hearing today to determine what may have led to last year's fatal UPS plane crash in Birmingham.
An investigator says no mechanical problems were found with the plane, its systems, or its warning devices.
The plane crashed on approach at Birmingham-Shuttlesworth International Airport on August 14.
Both pilots were killed.
So far, investigators haven't released the cause of the crash.
The NTSB is expected to hear from several organizations during the hearing, including UPS and the Federal Aviation Administration.