What was found
SEAT TRACK BETWEEN FRAME 40 AND 47 AT -Y1959 IS CORRODED AT LOCATIONS: FR40.3+0", FR41+3", FR41+4", FR42+16", FR45+5". CORROSION REMOVED PER SRM 51-74-00 REV 98. UNABLE TO FULLY REMOVE CORROSION DAMAGE OR ACCURATELY MEASURE DEPTH. DAMAGE LOCATED AT FR40.3, FR41+3?, FR41+4?,FR42+16?,FR45+5? SEAT TRACK CROWN INNER VERTICAL AREAS. ASSESSED AS OUTSIDE OF SRM 53-31-15 REV98 LIMITS. CONFIRMED AS LEVEL 2 CORROSION. PART REPLACEMENT REQUIRED. SEAT TRACK REPLACED AS PER SRM 51-72-11 REV98 AND DRAWINGS F57112824 ISSUE C.