Two passengers aboard the Asiana Airlines 020560.SE -0.21% flight that crashed while touching down in San Francisco have sued the airline, claiming they suffered 'extreme and catastrophic injuries and emotional distress' as a result of the accident.

The suit is believed to be the first following the crash. A lawyer for Asiana didn't immediately respond to a request seeking comment.

Asiana flight 214 hit a seawall in front of a runway as it came in to land at San Francisco International Airport on July 6. The plane skidded to a stop before catching fire. The crash killed three and injured dozens more.

In their initial probe, investigators from the National Transportation Safety Board didn't find evidence of equipment malfunctions, NTSB Chairman Deborah Hersman said last week. The agency was looking into whether the pilots had received adequate training, according to people familiar with the investigation.

Asiana officials have repeatedly said the pilots were both highly experienced and the airline's training programs meet all international and South Korean requirements.

The lawsuit was filed in San Francisco federal court by Younga Jun Machorro and her son Benjamin Hyo-Ik Machorro. Also joining the suit was Hector Machorro, the husband of Younga and father of Benjamin, who wasn't aboard the flight. He claims losses stemming from his wife's injuries.

'The conduct of Asiana's flight crew was egregiously reckless and negligent,' said Michael Verna of Bowles & Verna LLP, the Walnut Creek, Calif., lawyers for the plaintiffs. 'These pilots were unable to do the most basic task