In years past, the Board has also focused on the expanded use of data capture to enhance safety. The NTSB took a further step forward this year by recommending the installation of data recorders and increased focus on topics like safety management systems focused specifically on aircraft operating under Part 135. NTSB Chairman Robert Sumwalt said, “While many Part 135 operators meet extremely high safety standards, operators across the country are not required to meet the same standards as … the domestic airlines. We’ve investigated crashes that killed passengers and we discovered ways Part 135 operations could improve on safety. A paying passenger should have the same level of safety as other commercial operators. There’s a plethora of data that’s captured from regular flights, not just from accidents. That’s what the airlines are using and this could be scalable to Part 135.” Part 121 carriers for instance are required to undergo controlled flight into terrain training, while Part 135 operators are not.