A report says the pilot of a larger plane was looking away from the tail of a smaller plane when the larger plane’s right wing hit the tail at Atlanta’s airport on Sept. 10.

Two planes hit each other at a taxiway intersection at the Hartsfield-Jackson Atlanta International Airport Tuesday morning, according to the Federal Aviation Administration.

A new report on the incident from the National Transportation Safety Board details how the two planes managed to clip each other, leading to one plane’s tail coming off the main body.