As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - PILOT RECORDED IN LOG BOOK THAT THE CABIN CREW HEARD A LOUD NOISE FROM THE LEFT SIDE OF THE AIRCRAFT. NO IRREGULARITIES WERE REPORTED FOR ENGINE READINGS. MAINTENANCE FOUND PARTS OF THE COWLING SKIN BLOW OUT NEAR THE 12 O'CLOCK POSITION. A 3 FT BY 6 INCH HOLE IN THE FAN DISCHARGE FRONT OUTER DUCT AT THE 2 TO 5 O'CLOCK POSITION WAS FOUND. THE ENGINE WAS REPLACED. (M)