The letter, initially reported by The Seattle Times, came after a heated Senate committee hearing on Wednesday, during which Boeing and the National Transportation Safety Board clashed over the extent of the company's cooperation with investigators. During the hearing, the chair of the safety board, Jennifer Homendy, said that Boeing had consistently declined to disclose the identities of employees responsible for door panel work on Boeing 737s for two months. Additionally, Boeing failed to furnish documentation pertaining to a repair task involving the removal and reinstallation of the door panel.