As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - C21 CK - C - BS 178 PRESS BULKHEAD CENTER WEB HAS A 1 INCH CRACK AT LBL 6.6, WL 221.5 TO WL 222.5 BELOW REINFORCEMENT AS DETERMINED WITH ULTRASONIC INSPECTION. MAINTENANCE CUT OUT DAMAGED AREA, FABRICATED REPAIR DOUBLER AND FILLERS AND INSTALLED REPAIR IAW AWA ER 15-5312-01249-DL3.