What was found
MIR / FSD- ON DEPARTURE, GOT A BAD AIRFRAME VIBRATION, RETURNED TO AIRPORT. LEFT ENGINE, LEFT MAGNETO HAD A 700 RPM DROP, REMOVED AND REPLACED MAGNETO. OPS CHECK GOOD. AC RETURNED TO SERVICE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MIR / FSD- ON DEPARTURE, GOT A BAD AIRFRAME VIBRATION, RETURNED TO AIRPORT. LEFT ENGINE, LEFT MAGNETO HAD A 700 RPM DROP, REMOVED AND REPLACED MAGNETO. OPS CHECK GOOD. AC RETURNED TO SERVICE.