As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: LEFT HAND SIDE OF FUSELAGE SKIN HAS AREAS OF CORROSION AROUND LAVATORY VENT AT AIRCRAFT STA 917 AND STR 21L TO 22L. CUT OUT DAMAGED SKIN AND INSTALLED EXTERNAL DOUBLER AND TRIPLER REPAIR. PER B737-NG SRM 53-70-01-2R-3.