Sorta on-topic - What happened with the BMI Kegworth 737-400 when they shut down the RH engine? They tried a restart so it would seem that they didn't turn the handle ... ?
Time to get the report out and review it
Timing and conditions of a restart attempt are critical. Too little time and too little speed doom the attempt. If they had realized soon after they shutdown the wrong engine then a restart attempt would have been successful on the good engine. But since the flight conditions were such to keep the bad engine docile (vibs went away) they didn't realize their mistake until they spooled the bad engine way up for landing and trashed it. By then there was too little time and airspeed to restart the good engine. I don't believe that the fire handles entered into this until they trashed the bad engine during landing, but the details are in the report.