Field), St. Louis, Missouri, while both aircraft were in the landing pattern for runway 17. The Cessna was destroyed during the collision with the DC-9 and the subsequent impact with the ground, and both of its occupants were killed. The DC-9 sustained light damage and was able to land safely; none of its 44 passengers or five crewmembers were injured. The probable cause was determined to be a combination of inadequate visual flight rules (VFR) procedures in place at the airport, the failure of the DC-9 crew to notice the other aircraft in time, the controller's failure to ensure that the Cessna had received and understood important landing information, and the Cessna crew's deviation from their traffic pattern instructions and/or their continuation to a critical point in the traffic pattern without informing the controller of the progress of the flight. 4 August 1968. Cessna 150F N8742S collided with North Central Airlines Flight 261, a Convair CV-580, southwest of General Mitchell Airport in Milwaukee at , as the northbound Convair from Chicago descended for an approach to the airport's runway 7R. The cabin section of the northwest-bound Cessna embedded itself in the Convair's forward baggage compartment. The Convair lost electrical power and its right engine was shut down due to a damaged propeller; the captain completed a successful emergency landing six minutes later. All three occupants aboard the Cessna were killed and the first officer on the Convair was seriously injured, but the other three crew and eight passengers were uninjured. The Cessna was on a VFR flight from Lombard, Illinois, to Sheboygan County Memorial Airport in Sheboygan Falls, Wisconsin. It was determined that the inability of the Convair 580 flight crew to detect the Cessna 150 visually in sufficient time to take evasive action, despite having been provided with three radar traffic advisories, caused the crash. The crew's visual detection capabilities were reduced by heavy insect smears on the Convair's cockpit windows that had accumulated during the flight. Visibility was further reduced by haze, smoke and sunglare, and by the Cessna's inconspicuous color and its lack of relative motion as the two aircraft converged. 9 January 1971. Cessna 150J N60942, conducting a student training flight for Linden Flight Service, Inc., collided with American Airlines Flight 30, a Boeing 707-323C, at about 2,975 feet over Edison, New Jersey, while the 707 was on approach to Newark Airport. The Cessna ran head-on