As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORTLY AFTER CONTROL SETUP FOR CRUISE CONDITION, ENG VIBRATION WAS DETECTED. THE PILOT ELECTED TO CARRY OUT A MAGNETO CHECK WHICH RESULTED IN A SUBSTANTIAL ENG RPM DROP WHEN THE NR RT MAGNETO WAS TESTED. THE PILOT ELECTED TO RETURN TO BASE. REMOVED THE MAGNETO & RETURNED IT TO THE MFG FOR WARRANTY. A STRIP REPORT HAS BEEN REQUESTED & WILL BE FORWARDED ON RECEIPT. PLEASE REFER TO SDR 20110209025.