As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REMOVED DUE TO EXCESSIVE CORROSION ON MAIN HOUSING IN AREA AROUND CHIP PLUG, AIR BREATHER VENT AND AT HOLES WHERE SAFETY WIRE IS ATTACHED TO HOUSING. GEARBOX WAS OVERHAULED AT T.T. 2575.00 ON FORM TRACKING AND W/O BH2122TN. SEND GEARBOX TO MFG FOR WARRANTY REPAIR DUE TO IMPROPER SURFACE PREPARATION WHEN IT WAS OVERHAULED AT A MFG OVERHAUL AND REPAIR FACILITY. RETURNED ON RO0056646. REFERENCE: MFG DMR NR 755847.