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Kmody

ATM GENERATOR won’t run ESS Bus

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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

 

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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

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Kindly Check  power 09 CB FS 245 Station upper crew bank and ESS Buss Off ind relay CBs and relay

Regards

Munir Abbasi

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Please Check  supply on the TB of ATM Generator output located at left side  near center wing. 

Thanks

Regards

Munir Abbasi

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