What was found
ON MG FOUND CORROSION AROUND LAV EXHAUST VENT. TRANSFERRED TO NRF 1 IAW TOPP 50-30-05. 278320. SUMMARY: CORROSION REMOVED, DAMAGE CONTAINED, AND REPAIR INSTALLED IAW ER /A 636893-14, REV ORIGINAL. RII'S COMPLIED WITH. (LP: 9490440, AIRCRAFT WAS GROUNDED)