Investigators continued to review evidence from a fatal plane crash in a Connecticut suburb left four people dead earlier this week, and a preliminary report on the accident is expected to be released within the next two weeks.  The Cessna took off from Robertson Airport in Plainville, a few miles away, Thursday morning and crashed into a manufacturing company building. The flight was headed to North Carolina.  Farmington police said the pilots aboard the small jet were Mark Morrow,  57, of Danbury and William O’Leary, 55, of Bristol. 33-year-old Courtney Haviland and her husband, 32-year-old William Shrauner, also died. The preliminary report will contain factual information about the plane, pilots, weather conditions and other factors, but a final report detailing the cause of the accident could take a year or more to complete.  Two employees at the manufacturing company suffered minor injuries.