The answer is clearly NO...
I quote pilot may 2007 page 28: can a ppl fly a jumbo ?
'a novice would not even be able to get into the electrical seats without being shown how they work'
'it's just a whimsical VFR piston-pilot's pipe dream'
'all flight decks now have armoured doors with deadbolts that cannot be opened from the outside, sorry, you're gonna die'
'where is he? where is he going ? to whom is he talking ? a mere twenty minutes of faffing around will put the aeroplane at least 200miles further along tract, VHF radios have a 200 mile range so the aeroplanes probably out of the range of the ATC they were talking to, if he can figure out a frequency to select, where's the transmit button ? there are a couple but both are hidden away out of sight, one looks very like the button that disengages the autopilot, you're all dead'
'need to program the runway in use and its ILS into the flight management system, that has to be manually selected'
'at least his final moments will be beautiful...'