As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, FOUND CORROSION ON FUSELAGE SKIN COMMON TO VHF 1 LOWER ANTENNA MATING SURFACE. LEVEL 2 CORROSION REQUIRED REPLACEMENT OF ANTENNA DOUBLER. REMOVED LOWER VHF 1 ANTENNA DOUBLER AND FABRICATED AND INSTALLED NEW DOUBLER IAW ATR42 SRM. (M)