What was found
DURING HEAVY CHECK, LT WING FUEL TUBE AND COUPLING UNDER PANEL 521AB IS CORRODED. MX R & R LT WING FUEL TUBE AND COUPLING IAW AMM 20-10-13, TUBE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY CHECK, LT WING FUEL TUBE AND COUPLING UNDER PANEL 521AB IS CORRODED. MX R & R LT WING FUEL TUBE AND COUPLING IAW AMM 20-10-13, TUBE.