Southwest Airlines Co. LUV, -1.14 % announced Friday that they have reached a tentative agreement with the union representing their mechanics and other employees. Air carrier’s agreement covers over 2,800 employees including aircraft maintenance technicians, aircraft inspectors. maintenance controllers, and training instructors. Southwest says the AMFA will give details on the agreement, including the date and time of its vote by members. Southwest Airlines’ stock dropped 1.6% during premarket trading in line with the U.S. decline. Global Jets exchange traded fund JETS -1.46% ., but less than the 0.8% drop in futures ES00 -0.69% of the S&P 500. SPX, -0.59%