The coroner's office identified the sixth victim of Saturday's crash of a Cessna 320 in the Sepulveda Dam Recreation Area as Harvey Lewis Victor, 63, of Woodland Hills. Victor and five others were killed when the plane crashed on approach to Van Nuys Airport. The Cessna, piloted by Dr. Stanley Z. Daniels, 56, of Granada Hills, a medical examiner for the Federal Aviation Administration, was one of two planes that crashed within two hours while attempting to land at the airport. The other aircraft, a Socata TB20 Trinidad flown solo by former soap opera actor John Gibson, flipped over in the air and crashed into a curb on Roscoe Boulevard, exploding in flames. Gibson, 37, died instantly. The other passengers in the Cessna were identified as Donald Stern, 55, of Granada Hills; Bertran Stern, 47, of Mountain View; Donald Scott Swanger, 39, of Chatsworth, and his daughter, Nicole, 14.