Technically a bad call can not be appealed. A ruling where an appeal is allowed , batting out of order, illegal sub etc. is a moot point once all players have left the field.
For a call which is questioned, and you are asked to confer with your partner, would I reverse a bad call? Yes I would (if I ever made one
).
Scorekeeping errors can be corrected this way , but they are also not appealls.
See thread titled "Fix this one" for more.