Statistical Analysis of U.S. Navy Major Aircraft Accident Rates, Pilot and Aircraft Time-Dependent Variables

Aircraft accident rates by month were analyzed for randomness, cyclic pattern or increasingdecreasing trends for all attack, fighter and propeller type aircrafts. The technique of Runs test was employed to the runs above and below the median. The analysis of pilotaircraft time dependent variables was also done for both accident and non-accident pilotsaircrafts. The hypothesis tested was, the accidents per hundred pilotsaircrafts were same for each category of pilotaircraft variable. The chi square one sample test, the chi square test for K independent samples and the Mann-Whitney U test were used for the analysis. The aircrafts considered for the analysis of pilot variables were A-4, A-7 and F-4, and the aircraft considered for the analysis of aircraft variable was F-4.