What was found
DURING ROUTINE CPCP INSPECTION, FOUND LEVEL 2 CORROSION. CORROSION AROUND 2 CLIP NUTS ON RBL 49 SEAT TRACK FWD OF BS 240. REMOVED CORROSION IAW 51-10-01. FOUND TO BE OUT OF LIMITS IAW B747 SRM 53-10-01. REMOVED SEAT TRACK SECTION IAW B747 SRM 51-30-02. REPLACED SEAT TRACK IAW B747 SRM 51-10-01 AND 51-30-02. FABRICATED SEAT TRACK SPLICE REPAIR DOUBLERS IAW B747 SRM 53-10-05 FIG 1A. INSTALLED SEAT TRACK SPLICE REPAIR IAW B747 SRM 53-10-05 FIG 1A. CORROSION TASK CARD NUMBER C53-210-07. NON-ROUTINE TASK CARD NUMBER 25228.