Say my list is as follows:
- AP-5 carrying Leia Organa. Currently on 1 Hull, no shields. All charges active.
- 4 x Blue Squadron Pilot B-Wings, none are stressed.

I dial in a 3-straight with AP-5, 2-Ks with the B-Wings. I use Leia's ability at start of Activation. I move AP-5, who overlaps an asteroid, rolls a hit, and is destroyed.

The B-Wings reveal their dials. Is the revealed 2-K a red or white maneuver? Does Leia's ability still apply?

RRG, p. 9, destroying ships:

Quote

• A destroyed ship’s abilities remain active until that ship is removed unless the ability specifies a different timing for the effect to end, such as “until the end of the Engagement Phase.” Such effects remain active until the end of the specified time.

Once you've used Leia's ability, the effect remains in place until the end of the activation phase, even if the ship carrying Leia is then destroyed.