建立皮托静压型空速指示器的基本最低安全性能标准，主要用于往复式发动机动力运输机，其运行可能会使仪表符合第3.3节规定的条件。

To establish the essential minimum safe performance standards for pitot static pressure type of airspeed indicators, primarily for use with reciprocating engine power transport aircraft, the operation of which may subject the instruments to the conditions specified in Section 3.3.