Sikorsky UH-60A crash near San Diego, California, United States

Sikorsky UH-60A N160AQ, operated by HeliStream on a Part 91 instructional flight with two pilots on board. Damage was substantial: four main rotor blade tips, one tail rotor blade and the vertical stabiliser. The two helicopters collided over the runway 26L underrun at Brown Field Municipal, San Diego, at about 17:50 Pacific time. Seahawk 410, the Navy MH-60R, was complying with the local controller's instruction to go around and overtook the HeliStream UH-60A from overhead as that aircraft was taking off. The UH-60A's main rotor blades struck the MH-60R's stabilator. Both crews landed and shut down, and nobody on either aircraft was hurt. The NTSB found the probable cause to be the failure of the crew of the second helicopter to maintain visual separation from the first while complying with the go-around instruction, with the night conditions and the absence of a safety alert from the controller as contributing factors. NTSB accident number WPR23LA045.