What was found
DURING ROUTINE CPCP INSPECTION FOUND LEVEL 2 CORROSION, SEAT TRACK CORRODED BETWEEN BS 580-BS 600, BWL 310 (UPPER DECK), LBL 45. REMOVED CORROSION IAW SRM 51-10-01. CORROSION OUT OF LIMITS IAW 53-10-01. ID MATERIAL PN BAC1520-1567P .07295. REPAIRED SEAT TRACK IAW B747 SRM 53-10-21. CORROSION TASK CARD NUMBER C53-210-03-4. NON-ROUTINE TASK CARD NUMBER B0083-16-N-00394.