Let’s first understand the difference between a intransitive and transitive verb.
A transitive verb is a verb that does need an object.
EXAMPLE: I bought a new notebook.
An intransitive verb is a verb that does not need an object.
EXAMPLE: The dog barked.
Here would be a sentence to change the transitive verb to an intransitive:
“The pilot did a successful job doing the test flight.”
This would be transitive because an object is needed at the end of the sentence, other wise the sentence wouldn’t make complete sense.
I hope this helps, have a wonderful day head! :)