<P> The United States ' first CVR rules were passed in 1964 , requiring all turbine and piston aircraft with four or more engines to have CVRs by March 1 , 1967 . As of 2008 it is an FAA requirement that the CVR recording duration is a minimum of two hours , following the NTSB recommendation that it should be increased from its previously - mandated 30 - minute duration . As of 2014 , the United States requires flight data recorders and cockpit voice recorders on aircraft that have 20 or more passenger seats , or those that have six or more passenger seats , are turbine - powered , and require two pilots . </P>
<P> The United States ' first CVR rules were passed in 1964 , requiring all turbine and piston aircraft with four or more engines to have CVRs by March 1 , 1967 . As of 2008 it is an FAA requirement that the CVR recording duration is a minimum of two hours , following the NTSB recommendation that it should be increased from its previously - mandated 30 - minute duration . As of 2014 , the United States requires flight data recorders and cockpit voice recorders on aircraft that have 20 or more passenger seats , or those that have six or more passenger seats , are turbine - powered , and require two pilots . </P>
when did black boxes get installed in planes
when did black boxes get installed in planes
by March 1 , 1967
by March 1 , 1967