As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DTW - ULTRASONIC AND EDDY CURRENT INDICATION CRACK EMANATING FROM NR 9 ATTACH HOLE IN UPPER AFT HORIZONTAL FLANGE OF LT TRAP PANEL. CRACK LENGTH APPROX 1 INCH. REPAIR ACCOMPLISHED IAW SB 53-182 AND DOUGLAS STRUCTURAL REPAIR MANUAL (SRM) 57-09 FIGURE 7A AND EA 5700-97-004. (M)