sentences:  The crash of Crossair Flight 498 was the first time in Crossair's 25-year history that the regional airline had lost an aircraft, and was the deadliest accident to hit the SAirGroup since the crash of Swissair Flight 111, an MD-11 flying from New York to Geneva that crashed into the Atlantic Ocean off Nova Scotia on 2 September 1998, killing all 229 aboard.At the time, Crossair operated 17 Saab-340 type planes, but eventually phased them out, replacing them with Embraer ERJ-145 regional jets.The crash came about in the midst of a bitter labor-management dispute between Crossair and its pilots over a possible pay raise and work rules changes.