As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON UPPER SURFACE OF SEAT TRACK ATTACH FITTING LOCATED AT LBL22 BETWEEN STA 328-344. REMOVED CORROSION INTERCOSTAL, FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-10-51. REMOVED AND REPLACED INTERCOSTAL PN# 141A5770U3 IAW SRM 51-40-02, BAC DWG 141A5730 REV A.