On 25 May 1979, American Airlines Flight 191 a McDonnell Douglas DC-10 lost its No.1 engine moments after take-off at Chicago's O'Hare International Airport and crashed into a trailer park shortly thereafter. All 271 people on board the plane as well as two other people on the ground were killed making it the worst single-aircraft air disaster in United States history.

On 28 December 1978, United Airlines Flight 173 ran out of fuel after a landing gear problem. The DC-8 circled in the vicinity of Portland and crashed in a sparsely populated area near 158th and East Burnside Street, killing 10 and seriously injuring 24 of the 189 on board. According to the NTSB, the flight crew failed to check the fuel state causing the plane to crash.