After a 737 Max 9 door panel blew off during an early January Alaska Airlines flight, an investigation initiated by the air safety regulator found that Boeing used Dawn liquid detergent as a lubricant for the 737 door seal.

According to a slide presentation seen by The New York Times, the Federal Aviation Administration discovered hundreds of issues with Boeing and one of its major suppliers' manufacturing processes during a six-week audit of the aircraft manufacturer's 737 Max productio...