AM.III.I.K15

From the FAA library

• Aviation Maintenance Technician Handbook - Airframep. 14-34
  Chapter 14: Aircraft Fuel Systems › Fuel System Components › Fuel Filters

  bypass-activated switch or a pressure differential switch. A high fuel differential pressure indicates a blockage to the fuel filter. The bypass valve physically activates a switch that closes the circuit to the annunciator in the first type. The differential ... pressure type indicator compares the input pressure of the fuel filter to the output pressure. A circuit is completed when a preset difference occurs. Thus, an indicator is illuminated should a blockage cause the bypass to open or the inlet…

• Aviation Maintenance Technician Handbook - Powerplantp. 2-42
  Chapter 2: Engine Fuel & Fuel Metering Systems › Engine Fuel System Components › Fuel Filters

  Fuel Filters A low-pressure filter is installed between the supply tanks and the engine fuel system to protect the engine-driven fuel pump and various control devices. An additional high-pressure fuel filter is installed between the fuel pump ... fuel control to protect the fuel control from contaminants that could come from the low pressure pump. The three most common types of filters in use are the micron filter, the wafer screen filter, and the plain screen mesh filter…

• Aviation Maintenance Technician Handbook - Powerplantp. 2-35
  Chapter 2: Engine Fuel & Fuel Metering Systems › Turbine Engine Fuel System—General Requirements › Hydromechanical/Electronic Fuel Control

  Fuel pump and filter. This fixed Wf/P3 ratio is such that the engine operates surge free and is capable of producing a minimum of 90 percent thrust up to 30,000 feet for this example system. All speed ... acting on the metering valve servo. The P3 limiter valve bleeds down the P3 pressure acting in the metering valve servo when engine structural limits are encountered in either control mode. The start fuel enrichment solenoid valve provides…