On July 1, 1965 Continental Airlines Flight 12 overran the runway while attempting to land at Kansas City Municipal Airport.

The accident also led to widespread implementation of runway grooving, which improves braking in wet landing conditions.

[citation needed] Flight 12 landed in heavy rain at 5:29 a.m. Central Standard Time, about 1,050 feet (320 m) past the start of Runway 18.

3 and 4 (right-side) engines, the aircraft pivoted 35 degrees to the left but continued to slide down the runway, still traveling at 40 knots (74 km/h) when it went off the concrete.

The CAB also determined that the point Flight 12 had touched down (1,050 feet (320 m) beyond the start of the runway) was within the designated ILS touchdown area.

[1]: 12–13  Based on information from Boeing on the 707's braking performance, input from a NASA technical expert, and witness interviews, the CAB determined that under the landing conditions at the time, it was not possible for Flight 12 to come to a stop in the remaining distance.

[1]: 14 In June 1966, the CAB released their final report, concluding that "the probable cause of this accident was hydroplaning of the landing gear wheels which precluded braking effectiveness.

"[1]: 13 Although there were no fatalities in the accident, it highlighted a number of shortcomings with jet aircraft operations at Kansas City Municipal Airport.

Runway conditions at the airport, and the Flight 12 accident, were given by ALPA as specific reasons for including Kansas City on their 10 worst list.