How does Accelerated Aging effect Lenara Kahn with an Engineering Pad
From this ruling we read (emphasis mine):

When a personnel gains a skill that is not printed on his or her card, that skill is not inserted anywhere into that personnel's listed skills and is therefore unaffected by Accelerated Aging.
However, if a personnel gains an additional level of a printed skill he or she already has, that printed skill can still be affected by Accelerated Aging.

Given that Lenara Kahn already has Astrometrics (that is, it's already printed on her card), it seems that Accelerated Aging will affect her.
Disclaimer: I was not so familiar with this game, but did quite some reading and searching. Still, open for suggestions.