Tuesday was a great day to be a Boeing (NYSE: BA) investor. After years of delays, the company launched its first 787 Dreamliner into the skies, en route to delivery to Japan's All-Nippon Airways in Tokyo. Ferried aloft with the plane is a soaring stock price for Boeing, which after rising 4.2% in anticipation of the launch yesterday, tacked on an additional 2.5% gain this morning.

It's "official"
The plane's first "official" delivery sets up Boeing for a marathon run from today's production rate. Over the coming months, 787-building will accelerate from two planes per month, to 2.5 planes by November, then 3.5 planes early next year -- eventually topping out at a frenetic 10-planes-per-month pace.

With 800-odd planes on order backlog, and more on the way, accelerating production is Boeing's best chance to smooth things over with disgruntled customers like ANA, United Continental (NYSE: UAL), AMR (NYSE: AMR), and Delta (NYSE: DAL) -- all of which have been kept waiting for years as Boeing got its supply chain unkinked. It's the best way, too, to assuage the anger at suppliers such as Spirit AeroSystems (NYSE: SPR), General Electric (NYSE: GE), and Honeywell (NYSE: HON), which have been ready for years to help Boeing build the 787 -- but been kept waiting by their customer's faulty production planning. Faster production also brings Boeing closer to CEO Jim McNerney's goal of earning "huge sums" on initial plane sales, followed by "an annuity for the next 25 to 35 years" as Boeing sells customers spare parts and collects fees to service the planes.

Now here's the bad news: The first nine years of this multi-decade revenue stream are going to look simply awful. As far back as June, Boeing had been warning investors that despite enjoying incredible sales success, the 787 would not actually become profitable "for some time." Yesterday, management put a number on that caveat: New Dreamliners will begin grossing profits by 2020.

Foolish takeaway
If all Boeing was telling us were that the 787 might not earn a profit for nine years, that would be bad enough. But it gets worse. Selling each incremental 787 at a loss means that by building planes faster, Boeing may actually increase the size of its losses over the next few years. As an investor, I wonder what effect this will have on the stock price once Mr. Market begins to notice the earnings impact.

My advice: Enjoy this week's gains while you can. They won't last long.

Or could I be wrong? Add Boeing to your Fool Watchlist and see if the stock can hold onto its gains.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.