As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4593 PIT-TOL. AFTER THE A/C RETURNED TO PIT DUE TO MULTIPLE COMPRESSOR STALLS, THE A/C WAS PARKED WHEN A BAGGAGE CART CAME LOOSE FROM THE TUG THAT WAS PULLING IT AND SLAMMED INTO THE AFT PART OF THE A/C FUSELAGE BEHIND THE CARGO DOOR.