If you receive, or have to expose, two of the same critical damage cards on the same ship, do the penalties stack? For example Weapons Failure or Damaged Engine.

Would you reduce your attack dice by two or would a blue turn become red?

It came up for the first time in a casual game, my opponent got two Weapons Failures, we decided not to stack it because we weren't sure.

Yes, they stack.

The expand on what Hiemfire said, yes they stack because everyone card is an individual effect on the ship it is dealt to.

To expand even further...

They are each treated individually, and the effects are cumulative because you are resolving each one separately, one at a time.

For instance, You attack with 2 Weapons Failure damage cars. You come to "Roll Attack Dice step, and determine the number of dice you roll, starting with the attack value of the weapon. Lets say 3. Since Weapons Failure is modifying this, you resolve it. "Roll 1 fewer attack die". You're down to 2. Resolve the 2nd one. You're down to 1.

By that same token, because they are treated individually, Their actions are also treated individually, as per this rule on page 3 of the Rules Reference.

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If a ship has multiple damage cards with the same name, each damage card’s ability is a different action.

Meaning you need to spend 2 actions to repair both Weapons Failure damage cards.

So how does that work for the 'blinded pilot' critical?

8 minutes ago, LTuser said:

So how does that work for the 'blinded pilot' critical?

That you are unable to modify your dice besides Force does obviously not stack, but you still need one action to repair each Blinded Pilot critical (so if you have both you need two actions).

So a single Critical damage can trigger multiple Fuel Leaks at once?

16 minutes ago, TedW said:

So a single Critical damage can trigger multiple Fuel Leaks at once?

Each Fuel Leak would add a hit to the queue with the same critical hit as trigger.

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So a single Critical damage can trigger multiple Fuel Leaks at once?

I'm not sure how one would have more than one Fuel Leak face up at a time, as gaining the second Fuel Leak would resolve the first.

Is there some ability that assigns a face up card with out resolving it?

Exposing a damage card is not the same things as suffering damage, so having something like Explosion with Wings or R2-D2 (Crew) expose a damage card does not trigger Fuel Leak (which only triggers on suffering a crit).

27 minutes ago, RedSquadBW said:

I'm not sure how one would have more than one Fuel Leak face up at a time, as gaining the second Fuel Leak would resolve the first.

Is there some ability that assigns a face up card with out resolving it?

Exposing a damage card is not the same as suffering critical damage. So a fireball could have an existing face-up Fuel Leak, then expose another Fuel Leak from their ability after a SLAM. Or Thane/Rexler/Concussion Missiles could expose a second one without causing the ship to suffer a critical that triggers the first one.