Al wrote

Regulations require that any failure requires a landing as
soon as reasonably possible.


Better quote a cite on that one Jim, and surely not ANY failure.

Section 121.565: Engine inoperative: Landing; reporting.
(a) Except as provided in paragraph (b) of this section, whenever an engine
of an airplane fails or whenever the rotation of an engine is stopped to
prevent possible damage, the pilot in command shall land the airplane at
the nearest suitable airport, in point of time, at which a safe landing can
be made.

(b) If not more than one engine of an airplane that has three or more
engines fails or its rotation is stopped, the pilot in command may proceed
to an airport that he selects if, after considering the following, he
decides that proceeding to that airport is as safe as landing at the
nearest suitable airport:

Bob Moore