Boeing Co. (NYSE: BA) shares fell after the second-largest commercial plane maker reported disappointing second quarter earnings.

Net income dropped 19% to $852 million, or $1.16 a share, from $1.05 billion, or $1.35 a share, a year earlier, the Chicago-based company said in a statement. Revenue was flat at $17 billion. The results fell short of the $1.22 profit estimate and the $17.3 billion revenue estimate of analysts surveyed by Bloomberg News.

Boeing reaffirmed its 2008 earnings per share guidance of between $5.70 and $5.85 as well as its 2009 earnings per share guidance of between $6.80 and $7.00.

"While we faced some challenges this quarter that affected our results, we remain confident in our outlook for the remainder of this year and 2009," said Chairman, President and CEO Jim McNerney in the earnings release. "Strong global demand for our products and services, a record backlog, and a sustained focus on productivity improvement and execution will continue to drive growth and profitability for this company."

Wall Street does not seem so confident given the precarious state of the airline industry, the continued delays in the 787 Dreamliner and the questions surrounding the huge tanker contract for the U.S. Air Force.

The outlook for Boeing is cloudy at best.