As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE AND CLIMB OUT, THE PILOT NOTICED A VIBRATION IN THE T/R PEDALS THAT WOULD INCREASE WITH POWER WAS INCREASES. HE RETURNED TO THE AIRPORT AND LANDED UNEVENTFULLY. MAINTENANCE FOUND THE T/R TEETERING BEARINGS WERE WORN EXCESSIVELY.