What happened
During the initial phase of flight operations at King Salmon Airport, the airplane encountered significant obstacles on the runway surface. As the aircraft accelerated down the runway for departure, it struck several large rocks embedded in or lying upon the pavement.
The impact with these hard objects was severe enough to compromise the structural integrity of the landing gear assembly. The force of the collision caused the main landing gear to tear away from the fuselage. This catastrophic failure of the undercarriage resulted in additional damage to the airframe. Specifically, the main wing spar and the stabilator sustained damage as a consequence of the gear separation.
Following the incident on the runway, the pilot managed to maintain control of the aircraft. After departing the beach area adjacent to the airport environment, the pilot navigated the damaged airplane directly back to King Salmon Airport for an emergency landing.