Following situation:

1) a ship with an ability like the TIE interceptor or A-wing: "After you perform an action, you may perform a red [Boost] or [Barrel Roll]red action.
2) Attempted an action that failed (e.g. boost/roll).

Can this ship now do its ship ability?

Reasons for Yes :

• The failed action did resolve, by failing.
• It is not a linked action.
• It is not an ability that requires a completed action

Reasons for No :

• It would be triggered by a specifically resolved action.

Relevant rules block: Fail

Some effects can fail, which means the effect did not resolve as intended and instead is resolved in a default way.

• A ship can fail when it barrel rolls, boosts, coordinates, decloaks, deploys, jams, locks, or SLAMs.
• An effect that fails does not trigger any effects that would occur after a ship resolves that effect.
• If an action fails, the player does not choose a different action to perform and cannot choose to resolve the effect in a different way.
• If an action fails, since the action was not completed, that ship cannot perform a linked action.
• If a red action fails, the ship still gains a stress token.

No. Failing an action is not performing an action, because you failed to perform it.

Rules Reference pg 11

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* An effect that fails does not trigger any effects that would occur after a ship resolves that effect.

* If an action fails, since the action was not completed, that ship cannot perform a linked action.

So, you kinda answered your own question.

As for this..

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S ome effects can fail, which means the effect did not resolve as intended and instead is resolved in a default way.

Yea. The intended result of an action is you perform it. The "instead" is you fail it.

Thanks, I was pretty sure there's no other action, but wasn't sure enough.