What happened
While flying at 11,000 feet, the left engine of the aircraft lost power during an attempt by the pilot to switch the fuel selector from the left main tank to the left auxiliary tank. Following the loss of power, the pilot performed troubleshooting according to the onboard checklist but was unable to restart the left engine. Additionally, the pilot was unable to feather the left propeller during securing procedures.
As the flight continued, the pilot utilized all remaining fuel from the right tip tank, the left tip tank, and the right auxiliary tank. During the descent for landing, the right engine also lost power due to fuel starvation. The pilot subsequently initiated a forced landing, resulting in the aircraft impacting high desert terrain in a gear-up configuration. The pilot was not injured.
Upon completing the landing, the pilot moved the right engine's fuel selector to the off position as a precaution against fire.