As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT #2906, FROM DTW LH CHIP DETECT LIGHT ILLUMINATED AFTER DEPARTURE FROM DTW. AT UNDER 1000' AGL. ALL ENGINE PARAMETERS NORMAL. QRH WAS COMPLETED MX NOTIFIED. AIR RETURN TO DTW. MAINTENANCCE REPLACED LH ENGINE S/N ON GE-E-367252. IAW JC #7100-301 PERFORMED TYPE 1 AND 11 BREAK IN RUNS, NO DISCREPANCIES NOTED. LEAK CHECK GOOD.