What was found
CORROSION AT LEFT HAND FLOOR BEAM AT FRAME 17, Y-12. (LEVEL 2 CORROSION) BLENDED CORROSION ON LEFT HAND BEAM AT FR 17 Y-12 IAW E-175 SRM 51-10-03. FOUND TO BE OUT OF ALLOWABLE LIMITS IAW E-175 SRM 51-75-16. LOCATED, DRILLED, COUNTERSUNK, AND DEBURRED FASTENER HOLES ON NEW LH SEAT TRACK PN 170-03264-001 PER EMB-175 SRM 51-40-02 AND 51-40-04. RESTORED FINISH ON NEW LH SEAT TRACK FROM FR 12 TO FR 20 PER EM 175 ETN EJ-51-025, GN-51-016, AND CPM 51-25-00. INSTALLED LH SEAT TRACK FROM FR 12 TO FR 20 PER SRM 51-40-08.