Originally Posted by
mirion
I am thinking you guts probably meant to say NSK bearings, right, I cant find any NGK bearings, just spark plugs.
I think mike is going to have the last laugh here,it's me suffering a touch of alz this time see pic.What was your job occupation mirion?
Bruce (acdc) worn bearings in flight don't make a howling noise might be prop and other things you are hearing.