As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED AN UNUSUAL VIBRATION IN FLIGHT. AFTER INSPECTING TRANSMISSION CORNER MOUNTS WE FOUND THAT THE LH CORNER MOUNTS WERE DELAMINATING/SEPARATING. WE JUST INSTALLED THESE CORNER MOUNTS ON 10/11/25 AND SHOULDN'T HAVE FAILED ALREADY.