What was found
THE BRACKETS (PN E6977-11D) THAT SUPPORT THE QUICK DISCONNECT PLUG ASSEMBLY FOR THE PROP DEICE BOOT DUG INTO THE PROPELLER BACKPLATE. THIS WAS DONE TO VARYING DEGREES AT EACH BLADE POSITION ON THE BACKPLATE. THIS OCCURRED ON BOTH PROPS ALTHOUGH IT WAS WORSE ON THE RIGHT PROP. THIS IS THE PROP REFERENCED ON THE FORM. THE HITTING OF THE BACKPLATE BY THE DEICE BRACKET ONLY OCCURS WHEN THE PROP GOES TO MAX REVERSE. THE PROPS ARE NOW AT THE PROP SHOP FOR INVESTIGATION.