As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
***CORROSION*** LEFT WING FUEL TANK ACCESS DOOR 533CB HAS CORROSION ON MACHINED STEP COMMON TO FASTENER HOLES. / PROCURED SERVICABLE PANEL 533CB FROM STOCK FOR USE ON L/W FUEL TANK ACCESS DOOR 533CB TO BE INSTALLED ON SA-M 565S. 81147U 6-3-18