CHICAGO — The Boeing Co. delayed its 787 jetliner program again Tuesday, pushing back its expected debut in commercial service to the third quarter of 2009 as it continues to grapple with problems involving its supply chain and the need to redo some outside work. The plane’s first flight, originally targeted for last year, now isn’t expected to take place until the fourth quarter of this year as Boeing builds more time into the schedule to reduce the risk of further delays on the program. The fourth delay with the 787, coming less than three months after the last one, further undermines Boeing’s credibility on the much-hyped program and also is a setback to the more than 50 airlines that have placed about 900 orders for the top-selling plane. Buyers are likely to seek compensation for the delays. For the full story visit http://www.latimes.com/business/la-fi-boeing10apr10,1,7019202.story