As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 1702 - LEFT GEAR UNSAFE LIGHT ILLUMINATED AFTER TAKEOFF AT DTW WITH GEAR HANDLE UP. ACCOMPLISHED PROCEDURE IN QRH. RED LIGHT EXTINGUISHED UPON GEAR EXTENSION AT CLE. ADJUSTED LEFT DOOR POSITION SWITCH PER DC-9 MM 32-60-3. OPS CHECK GOOD. (X)