As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS PROPELLER CAME INTO OUR SHOP FOR STC BLADE ANGLE CHANGE ON A NEW PROPELLER. ON OUR FIRST CHECK OF THE BLADE ANGLE WE GOT 4 DEGREES AND KENW SOMETHING WAS WRONG. SO WE PULLED TH DOEM AND THE PISTON SNAP RING HAD NOT BEEN INSTALLED FROM THE FACTORY. (K)