As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER AEROBATICS, EXCESSIVE NOSE/PROPELLER VIBRATION WAS FELT, VERY ROUGH AND LOW AIRSPEED. ACFT LANDED SAFELY. FOUND NR 1 PROPELLER BLADE HAD EXCESSIVE PLAY. REMOVED AND REPLACED THE PROPELLER. PROPELLER WAS SENT TO MANUFACTURER FOR INSPECTION AND REPAIR.