The NTSB met Wednesday to discuss what led up to a deadly accident on a Southwest Airlines flight.
Jennifer Riordan was nearly sucked out of the plane back in April when debris from the engine broke a window mid-flight.
Passengers pulled her back in, but she later died.
The NTSB now says the accident was caused by fan blades in the engine separating during the flight.
They say the blades do require extensive review for certification, but they weren’t up for testing during that quarter.
Since the accident, officials have taken measures to ensure plane engines are inspected on a more regular basis.
“We really had no basis to prioritize these fan blades over any other blades in our fleet. In December of 2017 we made the decision to incorporate the Ultra Sonic inspection procedure into our regular maintenance program and look at every blade in our fleet every 3,000 cycles,” said Mark Wibben, Senior Director of aircraft and power plant engineering at Southwest Airlines.
Southwest did pull all similar planes out of service to inspect them after the incident.
They didn’t say if any deficiencies were found.