As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:SI CORROSION (C57-581-01.02-01) NR 4 FLAP TRACK HAS CORROSION ON THE MAIN LANDING GEAR BEAM AND SPOILER BEAM MOUNT SURFACE. REPLACED NR 4 FLAP TRACK IAW SRM 51-10-1, WILL BE INSTALLED ON TC C57-581-04-3D COROSION OUT OF LIMITS IAW OHM 57-40-01.