Boeing has not provided crucial information sought by the National Transportation Safety Board as it investigates what caused a door panel to come off a 737 Max 9 plane during an Alaska Airlines flight in January, the safety board’s chairwoman told a Senate panel on Wednesday.The official, Jennifer Homendy, told the Senate Commerce Committee that her agency had requested any documentation that exists regarding the opening and closing of the panel, known as a door plug, at Boeing’s factory in Renton, Wash. Ms. Homendy said the safety board had also requested the names of certain workers…