I may have told this story before, but when I first showed up to -37 (literally a few days after), one of the dets tried to launch what was either the last Penguin shot or one of the very last shots. When they pickled the weapon, the front lock on the BRU released but the aft one did not. The nose of the missile dropped a bit and then yawed out into the wind stream, thereby point the motor towards the fuselage, and as you know, right behind the AW.
Everyone apparently just stared at it for a moment trying to figure out what to do next, since the EPs didn't really cover a partially hung, armed missile. The AW said he could pop the window out and try and kick the back of the weapon loose, but as you can imagine, that idea was vetoed.
I think they finally ended up just landing with it, either on the boat or at the range (I can't remember if it was PMRF or San Clemente). No doubt that download took some time.
I want to say they deployed with at least one Penguin, but only ever flew with Hellfires, especially after OIF kicked off on their deployment.
The capability of that missile was actually really good, kind of like a mini-Harpoon, but the Navy never bought the Mx package with it (as it was explained to me), so the US version was extremely unreliable as they aged. I believe the Navy only bought ~100 units.