What was found
CHAFING ON NR 4 ENGINE LEFT COWL INNER DOUBLER ABOVE UPPER ACCESSORY EXHAUST CUTOUT. REPLACED DOUBLER PER BAC SRM 51-10-01.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CHAFING ON NR 4 ENGINE LEFT COWL INNER DOUBLER ABOVE UPPER ACCESSORY EXHAUST CUTOUT. REPLACED DOUBLER PER BAC SRM 51-10-01.