As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OVERHAUL OF THE CENTRIFUGAL FUEL BOOSTER PUMP 2 NEW ARMATURE SHAFT BEARINGS (PN: RB56637) WERE INSTALLED. ABOUT AN HOUR INTO THE BRUSH RUN-IN SEQUENCE, AN UNUSUAL NOISE WAS HEARD. THE NOISE WAS TRACED TO THE 2 NEWLY REPLACED BRGS. THE BRGS WERE SUBSEQUENTLY REMOVED FROM THE PUMP AND FOUND TO HAVE SOME ROUGHNESS.