What was found
LT INBD SEAT TRACK COMMON TO FRAME 23-29 CORROSION BEYOND SRM LIMITS. (LEVEL II) BLENDED CORROSION ON LT OUTBOARD SEAT TRACK BETWEEN FRAMES 23 AND 29 IAW ATR 72 SRM 51-21-42 REV 77. MEASURED MATERIAL LOSS AT BLEND AREAS AND FOUND VARIOUS AREAS BETWEEN FRAMES 23 +23A, 25+27 AND 28A+28D TO BE OUT OF LIMITS IAW ATR 72 SRM 53-00-00 FIGURE 304 REV 77. REMOVED SEAT TRACK FR 23-29 AND RADIUS BRACKETS AT FR 29 AND FR 23 IAW ATR 72 SRM 51-25-04 REV 77. INSTALLED SPLICE MATERIAL ONTO NEW SEAT TRACK BETWEEN FRAMES 23C/23D AND FR 28/28A IAW ATR 72 SRM 53-00-00 FIG 434 AND 51-25-04 REV 77. INSTALLED SEAT TRACK FR 23A-29 AND RADIUS BLOCK AT FR 29 IAW ATR 72 SRM 51-25-04 REV 77.