It's been a good two years since General Electric (GE 1.99%) Vice Chairman John Rice famously promised to invest "$30 billion" into retooling GE into an industrial superpower again. Two years on -- and depending on how you define "industrial" -- the company's probably only halfway through fulfilling on that promise today. And GE's not done shopping yet.

This week, according to The Wall Street Journal, GE's gearing up to make one of its biggest acquisitions yet -- a potential $4 billion deal to capture Italian aerospace company Avio SpA.

Avio is currently majority-owned by European private equity firm Cinven, which bought its stake from Carlyle Group (CG) in 2006 for $3.3 billion. Cinven reportedly wanted to IPO Avio itself but found the markets unreceptive. As a result, it's now settling for a cash-out to GE, accepting a middling 21% profit on a deal six years old ... so about 3.5% profit per year.

So Avio hasn't been such a great investment for Cinven. Can GE do better?

Avio: It gives you wings!
To find out, let's start with the valuation. In addition to Cinven, Italy's Finmeccanica also owns part of Avio -- about 15%. Assuming this stake is not already part of the rumored $4 billion purchase price, then acquiring it might cost GE an extra $700 million or so, raising the total valuation on Avio up to $4.7 billion.

Now, Avio is said to have generated as much as $2.6 billion  in revenues last year. As a privately held company, it's hard to verify this figure. But if accurate, it suggests GE may have to pay 1.8 times annual sales to own all of Avio. That's slightly more than the 1.6 P/S ratio that GE's own shares currently command -- but is it too much to pay?

I don't think so, and I'll tell you why: Avio grew its aerospace sales by 16% last year. That's a nice growth rate, and especially so when you consider that GE's own revenues actually declined  last year. Not to put too fine a point on it, but if GE is worth 1.6 times sales with declining sales, it's not too much of a stretch to see why Avio might be worth a mere two-tenths of a point more when it's growing sales at a double-digit clip.

The more so when you consider that Avio's faster-growing revenues are also more profitable than GE's. According to data taken from Dun & Bradstreet, Avio earned an operating profit margin of about 11.3% in 2011. That's a good 1.6 percentage points better than the 9.7% operating margin that GE is currently earning.

Foolish final thought(s)
So this could turn out to be a very good deal for GE and its shareholders -- and not only for GE. Avio, you see, is already a GE partner and helps the company build engines  for Boeing's (BA 1.63%) 777 and 787 jetliners. Now Boeing, as you may recall, had a bit of trouble getting its supply chain in order on the 787 recently. So by taking Avio in-house, GE will be shortening Boeing's supply chain by precisely one link, helping to keep costs under control, and helping to ensure that part arrive on time.

On the other hand, this deal could be bad news for GE rival United Technologies (RTX 0.82%), which also builds engines, and which has also partnered with Avio in the past. By taking its partner in-house, GE will make it just a little bit harder for UTC to do business.

And if GE can do this while goosing its own growth rate a bit, and raking in a little bit more profit on each revenue dollar collected ... so much the better.