What was found
SEVERAL LOCATIONS OF CORROSION ON UPPER CHORD FROM FS 760 TO 840, LBL 45.5 REMOVED CORROSION BY REMOVING DAMAGED UPPER CHORD AT STA 760-850, LBL 45.5 REF SRM 51-30-2. REMOVED FLOOR SUPPORT T-CHORD AND ATTACHED FLOOR SUPPORT ASSY'S AT LBL 45.5-62.0 -25.0-45.5 STA 760-850 REF SRM 51-30-2 AND BOEING DWG 65-16279. INSTALLED SEAT TRACK TO NEW UPPER T-CHORD AT STA 760 - 850, LBL 45.5 REF SOPM20-50- 01. INSTALLED NEW BUSHING AT STA 738 REF AMM 20-10-007. INSTALLED FWD SEAT TRACK AND FITTING AT STA 850-870 PLUS FITTING AT STA 774, LBL 44, REF SRM 51-30-2 AND 51-30-4. INSTALLED T-CHORD STRAPS REF SRM 51-30-2. THIS IS CLASSIFIED AS A MAJOR REPAIR.