 As the crew prepared for a final approach for an emergency landing on runway 28L, they lost the number one and number two engines to flameout, at which point a Mayday was declared.This was the last radio transmission from Flight 173 to Air Traffic Control; it crashed into a wooded section of a populated area of suburban Portland, about southeast of the airport.Of the crew members, two were killed, flight engineer Mendenhall and flight attendant Joan Wheeler; two sustained injuries classified by the National Transportation Safety Board (NTSB) as "serious," and four sustained injuries classified as "minor/none."