My Ercoupe 415C wing tanks show evidence of fuel leaking (both odor, loss of fuel, and blue staining). Most of the staining is around one of the drain valve fittings, but there seems to be evidence of seepage along one of the riveted seams.
I have been told to use sloshing compound by my AI, but others have said that this is to be avoided and possibly prohibited by an AD (Does anyone have this reference)? Does anyone know a way to stop leaks by somehow sealing from the outside, without the time and expense of drilling rivets and resealing from the inside? If not, is sloshing still a viable option?I would appreciate your recommendations. Bill Liggett
