Overview
- The NTSB convened a public hearing to vote on the probable cause of the door plug blowout nearly 18 months after the January 2024 incident.
- Investigators determined that four bolts securing a nonoperational emergency exit plug were removed for rivet repairs and never reinstalled at Boeing’s Renton factory.
- NTSB Chair Jennifer Homendy has signaled that the board will criticize Boeing’s safety culture and lack of documentation around unauthorized production work.
- Boeing is working on design changes to reinforce the door plug assembly and aims to retrofit all in-service 737 Max 9 jets within a year.
- The Federal Aviation Administration retains a cap of 38 737 Max jets per month and has increased inspector presence at Boeing and Spirit AeroSystems facilities.