Four pilots were on board the plane. The pilots flying when the plane crashed were Lee Jeong-min, who has flown for 12,387 hours (3,220 with the 777) and Lee Kang-kook, who has flown for 9,793 hours, according to the South Korean transport ministry. Lee Kang-kook being trained to fly the 777, and this was his first landing at San Francisco in the aircraft. However, he had landed at San Francisco before in a Boeing 747. Lee Kang-kook only had 43 hours of experience with the 777 before the crash.