As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION NOTED OVER LT WING FUSELAGE. RETURNED TO A AIRPORT. LANDING OUT 319.9 NORMAL LANDING. FOUND LT WING EXIT HATCH, DROP DOWN STEP HINGE PIN MIGRATED LOOSE. REINSTALLED HINGE PIN AND SECURED. ACCOMPLISHED ETOPS 1. OPENED AND CLOSED AFT NR 1 ENG CORE COWLS MM 05-51-38 MM 52-21-01.