What was found
ACFT WAS IN FOR A 3C INSPECTION AND THE NR 1 ENGINE FORWARD BOLT FLANGE WAS FOUND CORRODED. 2 BOLT HOLES AT NR 29 AND NR 45 WERE FOUND IF REPAIRED WOULD RESULT IN BEING BEYOND THE MM LIMITS AND REPAIR OF THE HOLES WOULD RESULT IN A THINWALL CONDITION. ALL OTHER CORROSION WAS WITHIN LIMITS. THE BOLT HOLES WERE REPAIRED BY PERFORMING A KEYHOLE REPAIR AND INSTALLING REINFORCEMENT PLATES PER SERVICE BULLETIN AE3007A-72-247. ALL WORK WAS ACCOMPLISHED IN REFERENCE TO THE SB AND WILL BE RELEASED AT THE END OF THE CHECK.