At 19:03 CST, a Douglas DC-9-31 operating as TAESA Flight 725 crashed just after takeoff from UPN. All 18 aboard were killed. Witnesses said the airplane assumed a higher than normal climb attitude as soon as it departed from runway 20. The airplane impacted the ground in a nose low attitude on a heading of 110 degrees in an avocado grove located on the east side of the departure course, 3.3 miles south of the airport.