As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT GATE, SMOKE IN COCKPIT WITH APU RUNNING. BURNING SMELL FOLLOWED BY APU FAIL ON EICAS. RAN APU FAIL AOM CHECKLIST. OIL LEAKING FROM APU COMPARTMENT. DEFERRED APU M PROCEDURES COMPLIED WITH. PERFORMED GND & VERIFIED SMELL WAS COMING FROM APU. FOUND CORE ENG DAMAGED. R & R APU ENG ASSEMBLY IAW WC 49-800-05. OPERATIONS & LEAK CHECKED GOOD & MEL ITEM RESTORED. PN AML 3930974-1 & SN M4504113A.