What was found
DURING ROUTINE C-CHECK, FOUND EXISTING DOUBLER CRACKED AT STATION 1620 BETWEEN LONGERON 17 LEFT AND 24 LEFT. REMOVED FASTENERS AS NEEDED TO REMOVE DAMAGED DOUBLER. FABRICATED NEW DOUBLER, LOCATED, DRILLED, TRIMMED, TREATED, PRIMED, INSTALLED NEW DOUBLER AND FASTENERS AT STATION 1620 BETWEEN LONGERON 17 LEFT AND 24 LEFT IAW DC8 SRM 53-2-0, 51-1-21, 51-3-0, 51-1-4, 51-1-5, AND 51-1-8.