Service Letter: 2100/2350 Series Bonded Stiffener Corrosion

Serial Letter Number: 212

Applicable Aircraft: Piper PA-12, PA-18, PA-19, American Champion 8GCBC, Aviat Husky A-1, A-1A, A-1B, A-1C-180, A-1C-200, Textron Aviation 170A, 170B, 172 Series, 175 Series, 2100 Floats, 2350 Floats

Applicable Serial Numbers: 21659-21998 and 23097-23180