As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BULGE AND MISSING RIVETS FOUND AFT OF THE LWR BEACON ON THE LEFT SIDE OF THE FUSELAGE. AREA IS MARKED WITH TAPE CORROSION FOUND UNDER SKIN AT STR 47L AND FRAME # 1761. UN ABLE TO DETERMIN AMOUNT OF DAMAGE TO FRAME AND STRINGER UNTIL SKIN IS CUT OUT. PERFORMED TRIMOUT REPAIR FOR CORROSION. ALL STEPS COMPLIED WITH IAW EA 1-5330-T0345505 PART 2.