The Federal Aviation Administration (FAA) has issued a proposed rule that would require all certificate holders conducting operations under Part 135 to include in their flight training programs crew resource management (CRM) for crewmembers, including pilots and flight attendants. The proposed rule would affect operators of both single and dual pilot fixed-wing airplanes and helicopters The notice of proposed rulemaking continues a precedent established by the 1995 CRM mandate for Part 121 airlines. The NPRM is open for comment through July 30. ‘This proposal is needed to ensure that crewmembers in Part 135 operations receive training and practice in the use of crew resource management principles, as appropriate for their operation,” the NPRM states. The proposed rule responds to National Transportation Safety Board (NTSB) recommendations, address a recommendation from the Part125/135 Aviation Rulemaking Committee (ARC), and would codify current FAA guidance. “The intended effect of this proposal is to reduce the frequency and severity of errors that are crew based, which will reduce the frequency of accidents and incidents within the scope of Part 135 operations,” the NPRM continued.