What was found
DURING ROUTINE CPCP INSPECTION FOUND LEVEL 2 CORROSION, SEAT TRACK CORRODED BETWEEN BS 510 AND BS 520, BWL 199.8, RBL 12. FOUND SEAT TRACK OUT OF LIMITS, STA 450 TO 510 IAW SRM 51-10-01. ID MATERIAL PN BAC1520-1566. REMOVED OUT OF LIMIT SEAT TRACK STA 450 TO 5510 IAW SRM 51-10-01. REPAIRED IAW B747 SRM 53-10-03. CORROSION TASK CARD NUMBER C53-210-03-4. NON-ROUTINE TASK CARD NUMBER B0083-16-N-00396.