Title: Cessna Models 140A, 150, A150, 170, 172, 175, P172D, R172, 177, 180, 182, 185, A185, 188, A188, 205, 206, U206, TU206, P206, TP206, 207, T207, 210, T210, 336, 337, T337, M337B Series Airplanes
Effective Date: May 30, 1988
Subject: Alternate source of fuel tank venting