As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IND - DURING A 'C4' CHECK, THE L1 DOOR WAS FOUND WITH A CRACK AT THE LOWER AFT CORNER, APPROX 1.5 INCHES LONG. A VISUAL INSPECTION DETECTED THIS CRACK TO A TRIPLER CUTOUT. STACKED DOUBLER ARRANGEMENT INSTALLED IAW SRM 53-31-00, FIG 836.