As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT GENERATOR DRIVE LIGHT ILLUMINATED. AIRCRAFT RETURNED TO FIELD. *S/D* RIGHT INTEGRATED DRIVE GENERATOR WAS REMOVED AND SENT TO SHOP. INTEGRATED DRIVE GENERATOR HAD BROKEN PISTON SLIPPERS. NEW INTEGRATED DRIVE INSTALLED, OPERATION CHECKS NORMAL.