What was found
UPPER CABIN SEAT TRACK HAS CORROSION STA 469 RBL 45. FOUND CORROSION OUT OF LIMITS. REMOVED SEAT TRACK RBL 400 TO 480 IAW B727 SRM 51-30-2, FABRICATED NEW SEAT TRACK FROM BAC 1520 KTP 017 792 7178 IAW B727 SRM 53-10-2 FIG 7, & 51-20-1. ALODINED & PRIMED IAW B727 SRM 51-10-2, INSTALL TRACK IAW B727 SRM 53-10-5.