What was found
DURING SCHEDULED INSPECTION AT AERO CORP IN LAKE CITY, FL, FOUND THE NR 4 SEAT TRACK STA 180 - STA 218 INBOARD AND OUTBOARD FLANGES WERE CORRODED. REMOVED CORROSION IAW SRM 51-10-3. FOUND TO BE OUT OF LIMITS IAW SRM 53-05 FIG 4B. REMOVED, DRILLED AND DEBURRED NEW SEAT TRACK IAW DC9 SRM 51-10-4 AND SRM 53-05 FIG 4F. INSTALLED NEW SEAT TRACK IAW DC9 SRM 53-05 FIG 4F AND SRM 51-10-3. (X)