The US National Transportation Safety Board (NTSB) announced last month that the access door assembly that detached from an Alaska Airlines 737 MAX 9 aircraft during a Jan. 5 flight appears to have been caused by missing four bolts, that would keep it firmly in place.
Boeing executive vice president Ziad Ojakli said in a letter to U.S. Senator Maria Cantwell that: “We have searched carefully and have not located any relevant documents” and that Boeing’s working hypothesis is that “the documents required by the relevant procedure, were never drawn up when the access port component failed”.
NTSB Chairwoman Jennifer Homedy on Wednesday criticized what she described as a lack of cooperation on Boeing’s part and a failure to release some documents, including the central component for opening and closing the access door, as well as the names, of the 25 workers in the production department of the access assembly of the detached aircraft.
The part of the detached aircraft is manufactured at the 737 aircraft manufacturing facility in Renton, Washington.
“It’s strange that two months after the incident we don’t have the document,” Homedi said during a Senate Commerce Committee hearing.
After Homedi’s comments, Boeing released the names of the 25 workers, as announced by the company, but also by the NTSB, while the executive director of the American company, Dave Callun, spoke with Homedi.
Immediately after the incident, which caused no injuries, the US Civil Aviation Administration (FAA) grounded the MAX 9 jets for several weeks in January, barring Boeing from ramping up production and ordering the US company to develop a comprehensive plan to address “quality control issues in its production system” within 90 days.
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