What was found
CORROSION ON LOWER REAR FUSE 1, ON ANTENNA DOUBLER FOR AFT RADIO ALTIMETER #2 BTW FR 68-69. BTW FR 68-69, CORROSION FOUND ON LOWER REAR FUSELAGE 1. SUPPORT ANTENNA AND PLATE ASSEMBLY FOUND OUT OF LIMITS AND NEED TO BE REPLACED. SKIN BLENDED FOUND OUT OF LIMITS, NEED TO BE REPLACED. LAY OUT FOR PATCH REPAIR DONE. CUT OUT AND PATCH FABRICATED. SKIN REPAIR DONE. PLATE ASSEMBLY AND SUPPORT ANTENNA REPLACED AND INSTALLED WITH NEW PART.