What was found
APU AUTO SHUTDOWN AT GATE, SMOKE FROM TAILPIPE IMMEDIATELY AFTER SHUTDOWN. INSPECTED APU, FOUND DAMAGE TO FIBERGLASS SHROUD BELOW COMPRESSOR SCREEN. INSPECTED APU COMPARTMENT FOR DAMAGE, FOUND NONE, TAILPIPE WAS CLEAN, APU ACCESS DOORS CLOSE AND LATCH NORMALLY, DAMAGE IS LIMITED TO APU INTERNALS AND FIBERGLASS COMPRESSOR SCREEN SHROUD AREA. APU IS INOPERATIVE. REPLACED APU PER TOD. OPS & LEAK CHK NORMAL.