As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORIGINAL CUSTOMER SQUAWK WAS LOOSE AND SMOKING FASTENERS. AFTER DETAILED INSPECTION, FOUND COWL FLAP EXIT (LT/RT) CRACKED. EACH CRACK ABOUT 1 INCH IN LENGTH. SUSPECT CAUSE AT THIS TIME IS EXCESSIVE VIBRATION DUE TO SHAPE OF PARTS AND AMONT OF AIR FLOW PASSING OVER PARTS.