At 18:00 EDT, a Cessna 411 sustained substantial damage from fire and explosions while the pilot was starting the engines at Oakland/Troy Airport. No one was injured. The pilot said he started the left engine first without any problems, then started the right engine. He heard two loud backfires or explosions after the right engine started and part of the wing expanded upward. The passenger saw flames coming from the right wing, the pilot shut down both engines and they evacuated.