Poor maintenance is often a factor when skydiving planes crash like one did in Missouri on Sunday, and the National Transportation Safety Board has said in past investigations that weak oversight of the skydiving industry can allow problems to go unnoticed.
It is far too soon to know what caused this weekend's crash that happened shortly after a plane took off from a small airport about an hour south of Kansas City. Twelve people died in the crash while some of their family members watched from the ground at Butler Memorial Airport. The NTSB will work to determine what happened over the next year or more before publishing its final report on the cause although the agency will release some preliminary details over the next month.
Just two years ago, another skydiving plane crashed near the same airport, but in that case everyone aboard was able to parachute to safety beforehand. The NTSB found that the handle for deploying a skydiver's emergency parachute got caught on something and sent him crashing into the plane's horizontal stabilizer as he jumped, causing the crash.
