As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE POSTFLIGHT INSPECTION THE CRACK WAS FOUND VISUALLY ON THE YELLOW BLADES FREQUENCY ADAPTER ELASTOMER SURFACE TRAILING EDGE SIDE JUST BEGINNING TO EXCEED THE M LIMITATION OF 10 MM OF LENGTH. THIS IS A VERY COMMON FAILURE THAT OCCURS USUALLY BEFORE THE HALF LIFE OF THE COMPONENT IS REACHED. THE OLDER PN OF THIS DESIGN USED A DIFFERENT ELASTOMER FORMULA AND RARELY CRACKED BEFORE 3000 HOURS OF SERVICE. SUGGEST MFG RETURN TO OLDER ELASTOMER FORMULA OR VENDOR FOR THE OLDER PN PARTS. (K)