And if you need an engine driven pump then you probably already have a
backup electrical pump. Would there really be any need to replace the
mechanical one before it wears out?


Are people actually flying with this logic?

Key words here are "need" engine driven pump and "backup" electrical.

Is it a matter of the pump failure that could cause other problems besides
fuel pressure, like lack of fuel flow.. do you know why the SB was
suggested?

Like another poster said, it's free.. why NOT do it.

BT