As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT RIGHT OVERWING EMERGENCY EXIT DOOR VIBRATING WITH EXCESSIVE NOISE DUE TO DOOR STEP CABLE NOT SECURED PROPERLY INTO FUSELAGE CAUSING A GAP BETWEEN THE STEP AND FUSELAGE. RESECURED DOOR STEP CABLE IAW AMM 52-21-01. OPERATIONAL CHECK GOOD. AIRCRAFT WAS GROUNDED.