help needed

After several months ofr inactivity I start CFS and find several duplicate missions. When I try to fly aircraft explodes on runway. Any ideas?
Flight Simulator and other chat
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https://forums.simviation.com/phpBB3/viewtopic.php?f=4&t=17821
Are you unloading a bomb while sitting on the runway?
Trust me I have done this!
Being used to flying FS9 for so long switching to a sim with different key commands is confusing.
If I didn't drop a bomb I would shoot up the aircraft in front of by hitting my brakes, oh wait in CFS1 that is the trigger!