Array value from table as parameter

Hi,
I need to pass an array as a parameter in a function, but it is a part of a trigger that get a "new" value.

I've tested it like
select function_x(10000,555555,array[['xxxxx'],['yyyyy']]) orselect function_x(10000,555555,array[['xxxxx','yyyyy']])
and it worked.

But if I use
select function_x(10000,555555,new.situations)
it doesn't work, as the value comes like this: {"xxxxx","yyyyy"}

I couldn't find a function that converts {} values back to [] without treat it as a string and use replace, what I think that is not the ideal solution because it may can't satisfy more complex arrays.

Regards,
Aislan Luiz Wendling