Boeing 747-9 mid-air malfunction: Inability to locate records for door panel maintenance

Boeing admits inability to locate maintenance records for a malfunctioning door panel during an Alaska Airlines flight in a letter to Congress. Sen. Maria Cantwell demands response regarding grounding of Alaska Airlines' Boeing 737-9 fleet. Alaska Airlines CEO Ben Minicucci announces emergency landing in Portland. Records regarding panel removal and reinstallation in Renton, Washington, were potentially never generated.