As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NUMBER 1 AND 3 ENGINE FORWARD MOUNT UPPER FLANGES WERE FOUND TO HAVE 1 LOOSE HI-LOK FASTENER EACH AT ENGINE STATION 146. REMOVED FASTENERS AND REAMED HOLES PER SUN COUNTRY ENGINEERING ORDER, PERFORMED HFEC ON OPEN HOLES, NO CRACKS NOTED. INSTALLED REPLACEMENT FASTENERS.