An 18-year-old pilot was flying with his grandmother and cousins aboard when something went wrong over the Cajon Pass northeast of Los Angeles. The first flight of the new year was one to remember for a teen pilot and his family. Brock Peters, 18, was flying his grandmother and two cousins from Apple Valley to Riverside Municipal Airport Monday morning when his small plane lost power over the Cajon Pass. He said heard a ‘boom’ sounds coming from the engine before the power loss. The rugged mountain pass between the…