As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJO - DURING Q-CHECK, FOUND THE CABIN FLOOR CHANNEL BETWEEN BS 1006 - BS 1030 BL ZERO HAD CORROSION OUT OF LIMITS. L = 7.00 INCHES. W = 2.00 INCHES. D = 0.040 INCH. REPLACED THE CABIN FLOOR CHANNEL BETWEEN BS 1006 - BS 1030 BL ZERO IAW BOEING SRM 51-10-1 PAGE 8 AND SRM 51-30-2. (X)