AT: "ar" Helmsman McKenna was the conn officer assigned to the USS Enterprise for its launch in 2258.
Hikaru Sulu was a last-minute replacement for McKenna, however, when the latter was diagnosed with lungworm. (Star Trek)
McKenna's first name was revealed to be Kyle in the Starfleet Academy novel The Gemini Agent. He also had a sister named Amy. (Red Level Down)
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