What was found
(MTND) CORROSION FOUND UNDER ADF ANTENNA BETWEEN FRAMES 28C AND 28D, FOUND ON 2 YEAR INSPECTION FOR ANTENNA`S AND SKIN UNDERNEATH. ATR SOURCE DOCUMENT 535101-4. REPAIRED IAW ATR 72, SRM 53-51-27. PROBABLE CAUSE DETERIORATED SEALANT AND MOISTURE ENTRAPMENT. TO PREVENT DAMAGE, CREATE A GOOD WATER TIGHT SEAL BETWEEN ANTENNA AND FUSELAGE SKIN.