As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON LOWER FRAME SECTOR AT FS310.00 BETWEEN STGR 26L AND STGR 26R. (C-CHECK) RO: 04/21/2019 REMOVED AND INSTALLED NEW LOWER FRAME SECTOR P/N # 601R32002-69 AT FS310.00 BETWEEN STGR 23L AND STGR 23R IAW SRM. PERFORMED PRESSURIZATION LEAK CHECK, NO LEAKS NOTED.