As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUSELAGE SKIN FWD OF WTB HAVE MULTIPLE BELLY DRAINS WITH CORROSION. GROUNDED - YES. REMOVED CORR FOUND TO BE IN LIMITS IAW B737-900 SRM 53-30-01-1A-1 REFINSHED AREA IAW B737-900 SRM 51-20-01 SOPM 20-44-04 THIS IS A CAT B REPAIR WITH AN INSPECTION THRESHOLD OF 50,000 CYCLES & 16,000 FLIGHT CYCLES REPEAT INTERVALS.W=1" O= .080 R= .078 L= 1" D= .002.