As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING WALK-AROUND, INSTRUCTOR NOTICED CRACK ON TOP OF AXLE FLANGE BOLT THROUGH-HOLE. SUSPECT CRACK FORMED BY STRESS CORROSION. SUBMITTER RECOMMENDED AXLE BE REPLACED AT 2,000-HR OR REPLACE ANODIZED ALUMINUM WITH ONE MADE OF STEEL JUST LIKE THE MATING SURFACE OF GEAR LEG. (X)