herky400M Posted November 18, 2016 Share Posted November 18, 2016 C-130World, we have an engine who indicated low performance on the test stand: the turbine and compressor have the almost the same Flight Hours, -power performance 96.7%, compressor EST 117 psi / OBS 114psi ==> so normal zone. 2nd attempt brand new overhauled turbine full potential, same compressor as above but the results were very bad 92.7% power performance, compressor Compressor perf done with CDP ESt 107Psi/CDP OBs 114 Psi Result : Compressor LOW ZONE. Power performance: OAT 55°f BARO 29.97inHg TORQUE 19115 inLB TIT 1050°C result 92,7% hmm, Question why suddenly low zone compressor and why suddenly low performance has anyone heard if the graphs are reviewed to calculate the compressor performances? best regards HERKY400M Quote Link to comment Share on other sites More sharing options...
pjvr99 Posted November 18, 2016 Share Posted November 18, 2016 Looks like a stuck bleed valve Bob. Check 6 and 12 o'clock positions Quote Link to comment Share on other sites More sharing options...
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