A Volaris Airbus A320-200, registration XA-VLC performing flight Y4-165 from Mexicali to Culiacan (Mexico), was accelerating for takeoff from Mexicali's runway 28 when a burning odour became noticeable in the cabin, subsequently smoke was observed. The flight crew stopped the climb at 6000 feet and returned to Mexicali for a safe landing on runway 28 about 15 minutes after departure. Mexico's AIB rated the occurrence a serious incident and opened an investigation. The occurrence aircraft was able to depart again after about 2.5 hours on the ground and reached Culiacan with a delay of 2.5 hours.