Witnesses will tell a federal safety board about the blowout on a Boeing 737 Max earlier this year [Video]

Investigators will question Boeing officials during a hearing starting Tuesday about the midflight blowout of a panel from a 737 Max, an accident that further tarnished the company’s safety reputation and left it facing new legal jeopardy.

The two-day hearing could provide new insight into the Jan. 5 accident, which caused a loud boom and left a gaping hole in the side of the Alaska Airlines jet.

The National Transportation Safety Board has said in a preliminary report that four bolts that help secure the panel, which is call a door plug, were not replaced after a repair job in a Boeing factory, but the company has said the work was not documented. During the two-day hearing, safety board members are expected to question Boeing officials about the lack of paperwork that might have explained how such a potentially tragic mistake occurred.

“The NTSB wants to fill in the gaps of what is known about this incident and to put people on the record about …