As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS COMPARTMENT, FRAME FS 394.00 HAS SURFACE CORROSION ON FWD LOWER CAP BETWEEN STGR 26L-26R. (FILED CLOSED) REMOVED AND REPLACED SKIN SUPPORT ON FWD SIDE OF FRAME FS394.00 IN REF TO SRM 51-42-06 AND 51-42-21. COMPLIED WITH TASK CARD 51-900-1003-SKY. COMPLETED M-337.