Powerplant Instruments; Fuel Pressure Indication

This document amends the certification requirement for fuel pressure indicators on pump-fed engines of normal, utility, acrobatic, and commuter category airplanes to permit regulatory alternatives to fuel pressure indicators to warn pilots of fuel system problems. A fuel pressure indicator is not technically the only means available to the pilot of indicating a fuel system problem. The amendment allows airplanes to be certificated with a means that indicates fuel flow or that monitors the fuel system and warns the pilot of any fuel flow trend that could lead to engine failure. New technology incorporated as a means of compliance with the revised rule could improve engine operation and reduce airplane operating costs.