As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) LT AND RT ENGINES AND PROPELLERS SUFFERED OVERTORQUE. ENGINE GAS GENERATOR MODULES SUFFERED OVERSPEED. CAUSED BY OPERATING INEXTREME TURBULENCE. BOTH ENGINES AND PROPELLERS REMOVED AND RETURNED TO RESPECTIVE MANUFACTURERS FOR INSPECTION.