Hand solo,. .About six years ago whilst the Pilots carried out a diversion I tore the flightdeck apart. We were all on oxy and about an hour away from the nearest airfield. After about 15 mins of very low vis ie the pilots could not see the instrements without peering forward through the smoke. I found the burning windshield heat controler and unplugged it. The smoke cleared, we downgraded the emergency and eventually landed safely. . .I don't think the same would have happened on a two man flightdeck do you??