At 11:16 mountain time, a Cessna P210N lost power on final approach to Deer Valley Airport and crashed during the ensuing forced landing. The pilot and passenger were killed. The pilot and passenger were returning from Puerto Penasco, Mexico, and had reentered the United States at Nogales. The pilot contacted the Deer Valley Tower southeast of the airport for landing and was given a five-minute hold for landing sequence. The pilot reported a loss of engine power about 1 miles from the runway on final approach, and said he was uncertain whether he could reach the runway. The landing gear and flaps were found extended.