Over the course of two day-long classes on Tuesday and Wednesday in Washington, the NTSB will hear from about 15 witnesses.
Audio system embrace Elizabeth Lund, senior vice chairman for high quality at Boeing, amongst different officers on the firm, in addition to officers from key provider Spirit AeroSystems, regulator Federal Aviation Administration and the machinists union.
The witness listing doesn’t embrace Alaska Airways.
Lund got here underneath hearth from the NTSB after offering an in depth abstract of the incident in June to journalists touring the corporate’s Renton plant.
Boeing workers recognized 5 “non-conforming” rivets within the fuselage after they arrived in Renton, however the challenge “didn’t create a security hazard”, Lund advised reporters.
However when the fuselage panel, often known as the door plug, was eliminated to switch the rivets, Boeing workers didn’t file the documentation to make the change on the door plug, Lund stated.
“We imagine that plug was opened with out the right paperwork,” Lund advised reporters. “There was a non-compliance to our processes at that time.”
She additionally stated Boeing was centered on closing a “hole” over the shortage of documentation and that figuring out who did the work “is the duty of the NTSB and that investigation continues to be occurring”.