As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT LANDED SHORT DUE TO REPORTED "STUCK THROTTLE" CONDITION. INVESTIGATION FOUND CSU BETA VALVE TO BE CORRODED (HEAVY RUST). AFTER REPAIR OF ACFT INCLUDING NEW CSU PROBLEM HAS NOT RETURNED. SUGGEST MFG ADD BETTER CORROSION PREVENTION IN THE DRY AREA OF THE CSU BETA VALVE AND INSTRUCTION FOR FIELD LUBRICATION/INSPECTION.