sharif101 Posted February 3, 2013 Share Posted February 3, 2013 gtc bleed pressure 42psi.leak check 18 sec.but when any engine start button press at that time bleed press decrease to12 psi.all bleed air valve leak check.pls give any idea Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted February 3, 2013 Share Posted February 3, 2013 ATM "OFF"? Sounds like the GTC Bleed air valve is closing to reduce the air output to prevent over temp of the GTC. "When turbine exhaust temperature reaches 648.8°C (1,200°F) maximum, an overload thermostat starts to open to meter a discharge of some of the bleed valve opening-pressure air. The valve opening is thus regulated to limit compressor loading." Check or change you thermostat. Quote Link to comment Share on other sites More sharing options...
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