Kmody Posted October 4, 2018 Share Posted October 4, 2018 Struggling with an ongoing ATM gen problem. Getting good freqs good volts. Turn ATM gen to on gen out light does not come on but the ESS bus off lite stays on and all systems requiring 3 phase power do not work. The single phase AC items on bus do work. AC instrument fuel control bus works and Elevator trim works. We have changed contactor, generator, GCP, and voltage regulator multiple times with no luck. Anyone seen this?? Thanks Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 6, 2018 Share Posted October 6, 2018 On 10/4/2018 at 7:32 PM, Kmody said: Struggling with an ongoing ATM gen problem. Getting good freqs good volts. Turn ATM gen to on gen out light does not come on but the ESS bus off lite stays on and all systems requiring 3 phase power do not work. The single phase AC items on bus do work. AC instrument fuel control bus works and Elevator trim works. We have changed contactor, generator, GCP, and voltage regulator multiple times with no luck. Anyone seen this?? Thanks Have check battery was connected and SW solenoide CB push in? EXT power contactar is not de-energized , check the K9 contactor Thanks Regards Munir Abbasi Home of hercules pakistan Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 6, 2018 Share Posted October 6, 2018 Kindly Check power 09 CB FS 245 Station upper crew bank and ESS Buss Off ind relay CBs and relay Regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted October 7, 2018 Share Posted October 7, 2018 Please Check supply on the TB of ATM Generator output located at left side near center wing. Thanks Regards Munir Abbasi Quote Link to comment Share on other sites More sharing options...
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