As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT CAME INTO THE MX SHOP FOR AN ANNUAL INSPECTION. THE ACFT IS ON A SET OF AMPHIBIOUS FLOATS, MODEL 3450. AFTER REMOVING THE RIGHT FLOAT BUMPER, 2 CRACKS WERE DISCOVERED ON THE BULKHEAD NOSE ASSY. PN 30A01000-329. THE CRACK STARTED FROM EACH OF THE BOTTOM NUT PLATES AND WERE 1" IN LENGTH.