A small plane crashed in a San Diego shopping center parking lot Wednesday, killing an 80-year-old woman who was the lone passenger and injuring the pilot, authorities said. The single-engine 1988 Mooney M-20L went down around 5:30 p.m. in a parking lot that serves a Costco and a Target store in the Kearny Mesa neighborhood. The plane bounced while landing at nearby Montgomery Field, continued westbound and went down, said Ian Gregor, a spokesman for the Federal Aviation Administration.