A 10-YEAR HISTORY OF AIR FORCE MOTORCYCLE MISHAPS (Fiscal 2000 to fiscal 2009) 2,170 total mishaps 144 Airmen dead 73 percent staff sergeant or below 44 percent killed in springtime 42 percent occurred at night 27 average age of mishap cyclist 23 killed in April, making it the deadliest month for riders 17 percent were not wearing their helmet 15 percent involved alcohol -- Air Force Safety Center