LOUISVILLE, Ky. — The National Transportation Safety Board (NTSB) has revised its report about what caused a 2018 plane crash that killed the Louisville City co-founder.

Wayne Estopinal, his company Vice President Sandra Johnson, and 32-year-old pilot Andrew Davis all died in the crash just seconds after taking off from Clark Regional Airport.

The NTSB initially said a failed winglet on the Cessna jet caused it to crash.

Winglets help control a plane’s aerodynamics.

In the revised report, the agency listed the new probable cause as the pilot’s inability to regain control after the plane began to roll for unknown reasons.