eliasafr Posted January 16, 2016 Share Posted January 16, 2016 With 4 eng low when fetharing pump on for fetharing the prop on ground check atm generator light goes on. We changed the atm gen and atm but prob remain same.............need ur suggestion please. Quote Link to comment Share on other sites More sharing options...
AMPTestFE Posted January 19, 2016 Share Posted January 19, 2016 How many are you trying to feather at once? We used to limit to two aux feather motors at one time while on ATM. Quote Link to comment Share on other sites More sharing options...
eliasafr Posted January 28, 2016 Author Share Posted January 28, 2016 Only one........even some time if the aux pump switch on the gen out light comes on...... Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted January 28, 2016 Share Posted January 28, 2016 Change your Voltage Regulator or increase the voltage output reading. Watch the frequency and voltage when you feather the prop and see if it drops. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted January 30, 2016 Share Posted January 30, 2016 Aux motor relay contacts are pitted. open the relay contacts see the condition. Munir abbasi Quote Link to comment Share on other sites More sharing options...
FredG Posted January 30, 2016 Share Posted January 30, 2016 Assuming one aux pump may be overloading the ATM generator. Check your ATM gen load for each aux pump (energize one prop aux pump at a time) to find out if one of the aux pump is drawing more power than the others. This may indicate the pump or wiring is going/bad. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted February 3, 2016 Share Posted February 3, 2016 On 1/16/2016 at 1:52 PM, eliasafr said: With 4 eng low when feathering pump on for feathering the prop on ground check atm generator light goes on. We changed the atm gen and atm but prob remain same.............need ur suggestion please. Normally it happened due ATM regulating valve assembly. please cannibalize to other munir abbasi Quote Link to comment Share on other sites More sharing options...
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