Water in Fuel Tanks
Are some of those who do regular water drains able to comment on whether they are seeing increasing amounts of water relative to the amount of tank top ups.
There was a time when we were concerned about Cladisporeum (spelling?) which grew in aircraft fuel tanks at the water fuel interface producing a corrosive of integral tanks. Many wing skins had to be replaced. Fuel additives were developed to combat the problem.
Then there was/is the additive called FS11 (I think) which is supposed to lower the temperatures at which icicles form in fuel..
Are we seeing the result of a relaxation of fuel specifications/testing and a growing problem of water content between the refineries and the final deliveries.?