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SAN DIEGO (CNS) – Two people including a former candidate for a U.S. House of Representatives seat were injured Thursday when a flight-trainer biplane crashed in a parking lot just north of Montgomery-Gibbs Executive Airport.

The Great Lakes 2T-1A-2 went down for unknown reasons shortly before 4:30 p.m. in an industrial area in the 8600 block of Balboa Avenue in Kearny Mesa, according to the San Diego Fire-Rescue Department and the Federal Aviation Administration.

The plane’s passenger, Chris Stoddard, returned to the site of the crash Thursday and told FOX 5 they’d experienced a mechanical issue before they crashed. According to Stoddard, a military pilot who unsuccessfully ran this year for California’s 53rd Congressional District seat, they were training how to use the plane and conducting touch-and-go maneuvers.

Paramedics took the two people who had been aboard the plane to nearby Sharp Memorial Hospital, SDFRD spokeswoman Monica Munoz said. The pilot’s name has not yet been publicly disclosed.

The FAA and the National Transportation Safety Board are investigating.