As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3310 - AFTER TAKEOFF, THE LEFT ENGINE CHIP DETECTOR ILLUMINATED. AIRCRAFT RETURNED TO DTW. MAINTENANCE INSPECTED SCAVENGE SCREENS AND FOUND NO DEBRIS. COMPLETED ALL APPLICABLE STEPS IAW GEMM 72-00-00. ENGINE RUN AND ALL CHECKS GOOD. (M)