cheema Posted November 8, 2010 Share Posted November 8, 2010 Why dash-1 calls "low press" lights for main tanks. but for Ext and aux calls them "tank empty" light. Quote Link to comment Share on other sites More sharing options...
lownslow Posted November 8, 2010 Share Posted November 8, 2010 The 8.5 PSI pressure switches that provide the "Low Press" indication on the fuel panel are actually on the engines just past the fuel heater/strainer. They provide indication of not only an empty tank but also of possible contamination of the fuel heater/strainer whereas the switches at the external and aux tanks provide only an indication of an empty tank. Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted November 8, 2010 Share Posted November 8, 2010 That's what I would have said....lol! Quote Link to comment Share on other sites More sharing options...
tenten Posted November 8, 2010 Share Posted November 8, 2010 “Low pressure†is a “warning†to the operators that the engine is under low pressure supply and need to be corrected-if engine is running- (the pressure switch is up stream of engine driven fuel pumps). And it can be due to: main tank pump failure, leakage/break on the engine fuel supply line, fuel tank contamination in addition to what brothers already mentioned. While the "tank empty" light (the pressure switch is on the lines leading to the cross-feed manifold) which mostly indicates that the tank (Aux or Ext) is empty, beside other possibilities of malfunctions, (but doesn’t indicate imminent hazard to the engines) Quote Link to comment Share on other sites More sharing options...
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