What was found
AIRCRAFT WAS MODIFIED BY INSTALLING GAR-AERO WHEEL ADAPTERS AND 8:50X10 TIRES PER STC SA4305WE WITH THE EXCEPTION - INSTALLED ON MCCAULEY WHEELS INSTEAD OF CLEVELAND WHEELS WITH A FIELD APPROVAL, 60.5 HRS AGO. THIS AIRCRAFT HAD A LIGHT DUTY WHEEL, PN C163006-0103, ON RT SIDE THAT FAILED (INNER WEBBING AND PARTING SURFACES CRACKED). THE LEFT SIDE HAD HEAVY DUTY PN C163006-0102 THAT DID NOT FAIL BUT SHOWED SIGNS ON MATING SURFACE OF FRETTING AND BOLTS LOOSE.